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api.lua

@@ -0,0 +1,12 @@
+local utils = ...
+
+
+
+-- function (spawn_pos, itemstack, owner, spawner_pos, spawner_dir, force)
+function lwcomponents.register_spawner (itemname, spawn_func)
+	return utils.register_spawner (itemname, spawn_func)
+end
+
+
+
+--

breaker.lua

@@ -0,0 +1,727 @@
+local utils = ...
+local S = utils.S
+
+
+
+if utils.digilines_supported or utils.mesecon_supported then
+
+
+
+local break_interval = 1.0
+
+
+
+local function get_breaker_side (pos, param2, side)
+	local base = nil
+
+	if side == "left" then
+		base = { x = -1, y = pos.y, z = 0 }
+	elseif side == "right" then
+		base = { x = 1, y = pos.y, z = 0 }
+	elseif side == "back" then
+		base = { x = 0, y = pos.y, z = -1 }
+	else -- "front"
+		base = { x = 0, y = pos.y, z = 1 }
+	end
+
+	if param2 == 3 then -- +x
+		return { x = base.z + pos.x, y = base.y, z = (base.x * -1) + pos.z }
+	elseif param2 == 0 then -- -z
+		return { x = (base.x * -1) + pos.x, y = base.y, z = (base.z * -1) + pos.z }
+	elseif param2 == 1 then -- -x
+		return { x = (base.z * -1) + pos.x, y = base.y, z = base.x + pos.z }
+	else -- param2 == 2 +z
+		return { x = base.x + pos.x, y = base.y, z = base.z + pos.z }
+	end
+end
+
+
+
+local function get_break_pos (pos, param2, range)
+	local breakpos = { x = pos.x, y = pos.y, z = pos.z }
+
+	for i = 1, range do
+		breakpos = get_breaker_side (breakpos, param2, "front")
+
+		if i < range then
+			local node = minetest.get_node_or_nil (breakpos)
+
+			if not node or node.name ~= "air" then
+				return nil
+			end
+		end
+	end
+
+	return breakpos
+end
+
+
+
+local function send_break_message (pos, action, name, range)
+	if utils.digilines_supported then
+		local meta = minetest.get_meta (pos)
+
+		if meta then
+			local channel = meta:get_string ("channel")
+
+			if channel:len () > 0 then
+				utils.digilines_receptor_send (pos,
+														 utils.digilines_default_rules,
+														 channel,
+														 { action = action,
+															name = name,
+															range = range })
+			end
+		end
+	end
+end
+
+
+
+local function get_tool (pos)
+	local meta = minetest.get_meta (pos)
+
+	if meta then
+		local inv = meta:get_inventory ()
+
+		if inv then
+			local stack = inv:get_stack ("tool", 1)
+
+			if stack and not stack:is_empty () then
+				return stack
+			end
+		end
+	end
+
+	return nil
+end
+
+
+
+local function add_wear (pos, wear)
+	if wear > 0 then
+		local meta = minetest.get_meta (pos)
+
+		if meta then
+			local inv = meta:get_inventory ()
+
+			if inv then
+				local stack = inv:get_stack ("tool", 1)
+
+				if stack and not stack:is_empty () then
+					local cur_wear = stack:get_wear ()
+
+					if (cur_wear + wear) >= 65535 then
+						inv:set_stack ("tool", 1, nil)
+						send_break_message (pos, "tool", stack:get_name ())
+					else
+						stack:set_wear (cur_wear + wear)
+						inv:set_stack ("tool", 1, stack)
+					end
+				end
+			end
+		end
+	end
+end
+
+
+
+local function can_break_node (pos, breakpos)
+	local node = minetest.get_node (pos)
+
+	if node then
+		local dig_node = minetest.get_node_or_nil (breakpos)
+
+		if dig_node and dig_node.name ~= "air" then
+			local node_def = minetest.registered_nodes[dig_node.name]
+
+			if node_def then
+				-- try tool first
+				local tool = get_tool (pos)
+				local dig_params = nil
+
+				if tool then
+					local tool_def = minetest.registered_items[tool:get_name ()]
+
+					if tool_def then
+						dig_params =
+							minetest.get_dig_params (node_def.groups,
+															 tool_def.tool_capabilities)
+
+						if dig_params.diggable then
+							return true, tool:get_name (), dig_params.wear
+						end
+					end
+				end
+
+				-- then try hand
+				dig_params =
+					minetest.get_dig_params (node_def.groups,
+													 minetest.registered_items[""].tool_capabilities)
+
+				if dig_params.diggable then
+					return true, nil, 0
+				end
+			end
+		end
+	end
+
+	return false
+end
+
+
+
+local function dig_node (pos, toolname)
+	local node = minetest.get_node_or_nil (pos)
+	local dig = false
+	local drops = nil
+
+	if toolname == true then
+		dig = true
+		toolname = nil
+	end
+
+	if node and node.name ~= "air" and node.name ~= "ignore" then
+		local def = utils.find_item_def (node.name)
+
+		if not dig then
+			if def and def.can_dig then
+				local result, can_dig = pcall (def.can_dig, pos)
+
+				dig = ((not result) or (result and (can_dig == nil or can_dig == true)))
+			else
+				dig = true
+			end
+		end
+
+		if dig then
+			local items = minetest.get_node_drops (node, toolname)
+
+			if items then
+				drops = { }
+
+				for i = 1, #items do
+					drops[i] = ItemStack (items[i])
+				end
+
+				if def and def.preserve_metadata then
+					def.preserve_metadata (pos, node, minetest.get_meta (pos), drops)
+				end
+			end
+
+			if def and def.sounds and def.sounds.dug then
+				pcall (minetest.sound_play, def.sounds.dug, { pos = pos })
+			end
+
+			minetest.remove_node (pos)
+		end
+	end
+
+	return drops
+end
+
+
+
+local function break_node (pos, range)
+	local node = minetest.get_node_or_nil (pos)
+
+	if node then
+		local breakpos = get_break_pos (pos, node.param2, range)
+
+		if breakpos then
+			local diggable, toolname, wear = can_break_node (pos, breakpos)
+
+			if diggable then
+				local breaknode = minetest.get_node_or_nil (breakpos)
+
+				if breaknode and breaknode.name ~= "air" then
+					local drops = dig_node (breakpos, toolname)
+
+					if drops then
+						local break_name = breaknode.name
+						local eject_pos = get_breaker_side (pos, node.param2, "back")
+
+						for i = 1, #drops do
+							utils.item_drop (drops[i], nil, eject_pos)
+						end
+
+						add_wear (pos, wear)
+						send_break_message (pos, "break", break_name, range)
+					end
+				end
+			end
+		end
+	end
+end
+
+
+
+local function breaker_off (pos)
+	local node = minetest.get_node (pos)
+
+	if node then
+		if node.name == "lwcomponents:breaker_on" then
+			node.name = "lwcomponents:breaker"
+
+			minetest.get_node_timer (pos):stop ()
+			minetest.swap_node (pos, node)
+
+		elseif node.name == "lwcomponents:breaker_locked_on" then
+			node.name = "lwcomponents:breaker_locked"
+
+			minetest.get_node_timer (pos):stop ()
+			minetest.swap_node (pos, node)
+
+		end
+	end
+end
+
+
+
+local function breaker_on (pos, range)
+	local node = minetest.get_node (pos)
+
+	range = tonumber (range) or 1
+
+	if node and range < 6 and range > 0 then
+		if node.name == "lwcomponents:breaker" then
+			node.name = "lwcomponents:breaker_on"
+
+			minetest.swap_node (pos, node)
+			break_node (pos, range)
+			minetest.get_node_timer (pos):start (break_interval)
+
+		elseif node.name == "lwcomponents:breaker_locked" then
+			node.name = "lwcomponents:breaker_locked_on"
+
+			minetest.swap_node (pos, node)
+			break_node (pos, range)
+			minetest.get_node_timer (pos):start (break_interval)
+
+		end
+	end
+end
+
+
+
+local function eject_tool (pos, side)
+	local node = minetest.get_node (pos)
+	local meta = minetest.get_meta (pos)
+
+	if meta and node then
+		local inv = meta:get_inventory ()
+
+		if inv then
+			local stack = inv:get_stack ("tool", 1)
+
+			if stack and not stack:is_empty () then
+				utils.item_drop (stack, nil, get_breaker_side (pos, node.param2, side))
+				inv:set_stack ("tool", 1, nil)
+			end
+		end
+	end
+end
+
+
+
+local function after_place_node (pos, placer, itemstack, pointed_thing)
+	local meta = minetest.get_meta (pos)
+	local spec =
+	"formspec_version[3]\n"..
+	"size[11.75,10.75;true]\n"..
+	"field[1.0,1.0;4.0,0.8;channel;Channel;${channel}]\n"..
+	"button[5.5,1.0;2.0,0.8;setchannel;Set]\n"..
+	"list[context;tool;5.0,2.75;1,1;]\n"..
+	"list[current_player;main;1.0,5.0;8,4;]\n"..
+	"listring[]"
+
+	meta:set_string ("inventory", "{ tool = { } }")
+	meta:set_string ("formspec", spec)
+
+	local inv = meta:get_inventory ()
+
+	inv:set_size ("tool", 1)
+	inv:set_width ("tool", 1)
+
+	-- If return true no item is taken from itemstack
+	return false
+end
+
+
+
+local function after_place_node_locked (pos, placer, itemstack, pointed_thing)
+	after_place_node (pos, placer, itemstack, pointed_thing)
+
+	if placer and placer:is_player () then
+		local meta = minetest.get_meta (pos)
+
+		meta:set_string ("owner", placer:get_player_name ())
+		meta:set_string ("infotext", "Breaker (owned by "..placer:get_player_name ()..")")
+	end
+
+	-- If return true no item is taken from itemstack
+	return false
+end
+
+
+
+local function on_receive_fields (pos, formname, fields, sender)
+	if not utils.can_interact_with_node (pos, sender) then
+		return
+	end
+
+	if fields.setchannel then
+		local meta = minetest.get_meta (pos)
+
+		if meta then
+			meta:set_string ("channel", fields.channel)
+		end
+	end
+end
+
+
+
+local function can_dig (pos, player)
+	if not utils.can_interact_with_node (pos, player) then
+		return false
+	end
+
+	local meta = minetest.get_meta (pos)
+
+	if meta then
+		local inv = meta:get_inventory ()
+
+		if inv then
+			if not inv:is_empty ("tool") then
+				return false
+			end
+		end
+	end
+
+	return true
+end
+
+
+
+local function on_rightclick (pos, node, clicker, itemstack, pointed_thing)
+	if not utils.can_interact_with_node (pos, clicker) then
+		if clicker and clicker:is_player () then
+			local owner = "<unknown>"
+			local meta = minetest.get_meta (pos)
+
+			if meta then
+				owner = meta:get_string ("owner")
+			end
+
+			local spec =
+			"formspec_version[3]"..
+			"size[8.0,4.0,false]"..
+			"label[1.0,1.0;Owned by "..minetest.formspec_escape (owner).."]"..
+			"button_exit[3.0,2.0;2.0,1.0;close;Close]"
+
+			minetest.show_formspec (clicker:get_player_name (),
+											"lwcomponents:component_privately_owned",
+											spec)
+		end
+	end
+
+	return itemstack
+end
+
+
+
+local function on_blast (pos, intensity)
+	local meta = minetest.get_meta (pos)
+
+	if meta then
+		if intensity >= 1.0 then
+			local inv = meta:get_inventory ()
+
+			if inv then
+				local slots = inv:get_size ("tool")
+
+				for slot = 1, slots do
+					local stack = inv:get_stack ("tool", slot)
+
+					if stack and not stack:is_empty () then
+						if math.floor (math.random (0, 5)) == 3 then
+							utils.item_drop (stack, nil, pos)
+						else
+							utils.on_destroy (stack)
+						end
+					end
+				end
+			end
+
+			minetest.remove_node (pos)
+
+		else -- intensity < 1.0
+			local inv = meta:get_inventory ()
+
+			if inv then
+				local slots = inv:get_size ("tool")
+
+				for slot = 1, slots do
+					local stack = inv:get_stack ("tool", slot)
+
+					if stack and not stack:is_empty () then
+						utils.item_drop (stack, nil, pos)
+					end
+				end
+			end
+
+			local node = minetest.get_node_or_nil (pos)
+			if node then
+				local items = minetest.get_node_drops (node, nil)
+
+				if items and #items > 0 then
+					local stack = ItemStack (items[1])
+
+					if stack then
+						preserve_metadata (pos, node, meta, { stack })
+						utils.item_drop (stack, nil, pos)
+						minetest.remove_node (pos)
+					end
+				end
+			end
+		end
+	end
+end
+
+
+
+local function on_timer (pos, elapsed)
+	breaker_off (pos)
+end
+
+
+
+local function allow_metadata_inventory_put (pos, listname, index, stack, player)
+	if listname == "tool" then
+		if stack and not stack:is_empty () then
+			local def = utils.find_item_def (stack:get_name ())
+
+			if def and def.tool_capabilities then
+				return 1
+			end
+		end
+	end
+
+	return 0
+end
+
+
+
+local function digilines_support ()
+	if utils.digilines_supported then
+		return
+		{
+			wire =
+			{
+				rules = utils.digilines_default_rules,
+			},
+
+			effector =
+			{
+				action = function (pos, node, channel, msg)
+					local meta = minetest.get_meta(pos)
+
+					if meta then
+						local this_channel = meta:get_string ("channel")
+
+						if this_channel ~= "" and this_channel == channel and
+							type (msg) == "string" then
+
+							local m = { }
+							for w in string.gmatch(msg, "[^%s]+") do
+								m[#m + 1] = w
+							end
+
+							if m[1] == "break" then
+								breaker_on (pos, m[2])
+
+							elseif m[1] == "eject" then
+								eject_tool (pos, m[2])
+
+							end
+						end
+					end
+				end,
+			}
+		}
+	end
+
+	return nil
+end
+
+
+
+local function mesecon_support ()
+	if utils.mesecon_supported then
+		return
+		{
+			effector =
+			{
+				rules = utils.mesecon_default_rules,
+
+				action_on = function (pos, node)
+					-- do something to turn the effector on
+					breaker_on (pos, 1)
+				end,
+			}
+		}
+	end
+
+	return nil
+end
+
+
+
+minetest.register_node("lwcomponents:breaker", {
+	description = S("Breaker"),
+	tiles = { "lwbreaker.png", "lwbreaker.png", "lwbreaker.png",
+				 "lwbreaker.png", "lwbreaker_rear.png", "lwbreaker_face.png"},
+	is_ground_content = false,
+	groups = { cracky = 3 },
+	sounds = default.node_sound_stone_defaults (),
+	paramtype = "none",
+	param1 = 0,
+	paramtype2 = "facedir",
+	param2 = 1,
+	floodable = false,
+	drop = "lwcomponents:breaker",
+	_digistuff_channelcopier_fieldname = "channel",
+
+	mesecons = mesecon_support (),
+	digiline = digilines_support (),
+
+	on_receive_fields = on_receive_fields,
+	can_dig = can_dig,
+	after_place_node = after_place_node,
+	on_blast = on_blast,
+	on_timer = on_timer,
+	on_rightclick = on_rightclick,
+	allow_metadata_inventory_put = allow_metadata_inventory_put
+})
+
+
+
+minetest.register_node("lwcomponents:breaker_locked", {
+	description = S("Breaker (locked)"),
+	tiles = { "lwbreaker.png", "lwbreaker.png", "lwbreaker.png",
+				 "lwbreaker.png", "lwbreaker_rear.png", "lwbreaker_face.png"},
+	is_ground_content = false,
+	groups = { cracky = 3 },
+	sounds = default.node_sound_stone_defaults (),
+	paramtype = "none",
+	param1 = 0,
+	paramtype2 = "facedir",
+	param2 = 1,
+	floodable = false,
+	drop = "lwcomponents:breaker_locked",
+	_digistuff_channelcopier_fieldname = "channel",
+
+	mesecons = mesecon_support (),
+	digiline = digilines_support (),
+
+	on_receive_fields = on_receive_fields,
+	can_dig = can_dig,
+	after_place_node = after_place_node_locked,
+	on_blast = on_blast,
+	on_timer = on_timer,
+	on_rightclick = on_rightclick,
+	allow_metadata_inventory_put = allow_metadata_inventory_put
+})
+
+
+
+
+minetest.register_node("lwcomponents:breaker_on", {
+	description = S("Breaker"),
+	tiles = { "lwbreaker.png", "lwbreaker.png", "lwbreaker.png",
+				 "lwbreaker.png", "lwbreaker_rear.png", "lwbreaker_face_on.png"},
+	is_ground_content = false,
+	groups = { cracky = 3, not_in_creative_inventory = 1 },
+	sounds = default.node_sound_stone_defaults (),
+	paramtype = "none",
+	param1 = 0,
+	paramtype2 = "facedir",
+	param2 = 1,
+	light_source = 3,
+	floodable = false,
+	drop = "lwcomponents:breaker",
+	_digistuff_channelcopier_fieldname = "channel",
+
+	mesecons = mesecon_support (),
+	digiline = digilines_support (),
+
+	on_receive_fields = on_receive_fields,
+	can_dig = can_dig,
+	after_place_node = after_place_node,
+	on_blast = on_blast,
+	on_timer = on_timer,
+	on_rightclick = on_rightclick,
+	allow_metadata_inventory_put = allow_metadata_inventory_put
+})
+
+
+
+minetest.register_node("lwcomponents:breaker_locked_on", {
+	description = S("Breaker (locked)"),
+	tiles = { "lwbreaker.png", "lwbreaker.png", "lwbreaker.png",
+				 "lwbreaker.png", "lwbreaker_rear.png", "lwbreaker_face_on.png"},
+	is_ground_content = false,
+	groups = { cracky = 3, not_in_creative_inventory = 1 },
+	sounds = default.node_sound_stone_defaults (),
+	paramtype = "none",
+	param1 = 0,
+	paramtype2 = "facedir",
+	param2 = 1,
+	light_source = 3,
+	floodable = false,
+	drop = "lwcomponents:breaker_locked",
+	_digistuff_channelcopier_fieldname = "channel",
+
+	mesecons = mesecon_support (),
+	digiline = digilines_support (),
+
+	on_receive_fields = on_receive_fields,
+	can_dig = can_dig,
+	after_place_node = after_place_node_locked,
+	on_blast = on_blast,
+	on_timer = on_timer,
+	on_rightclick = on_rightclick,
+	allow_metadata_inventory_put = allow_metadata_inventory_put
+})
+
+
+
+utils.hopper_add_container({
+	{"bottom", "lwcomponents:breaker", "tool"}, -- insert items below from hopper above
+	{"side", "lwcomponents:breaker", "tool"}, -- insert items from hopper at side
+})
+
+
+
+utils.hopper_add_container({
+	{"bottom", "lwcomponents:breaker_locked", "tool"}, -- insert items below from hopper above
+	{"side", "lwcomponents:breaker_locked", "tool"}, -- insert items from hopper at side
+})
+
+
+
+utils.hopper_add_container({
+	{"bottom", "lwcomponents:breaker_on", "tool"}, -- insert items below from hopper above
+	{"side", "lwcomponents:breaker_on", "tool"}, -- insert items from hopper at side
+})
+
+
+
+utils.hopper_add_container({
+	{"bottom", "lwcomponents:breaker_locked_on", "tool"}, -- insert items below from hopper above
+	{"side", "lwcomponents:breaker_locked_on", "tool"}, -- insert items from hopper at side
+})
+
+
+
+end -- utils.digilines_supported or utils.mesecon_supported

camera.lua

@@ -0,0 +1,452 @@
+local utils = ...
+local S = utils.S
+
+
+
+if utils.digilines_supported then
+
+
+
+local function is_drop (obj)
+	if obj then
+		local entity = obj.get_luaentity and obj:get_luaentity ()
+
+		return (entity and entity.name and entity.name == "__builtin:item")
+	end
+
+	return false
+end
+
+
+
+local function get_entity_dims (obj)
+	local dims = { -0.5, 0, -0.5, 0.5, 2, 0.5 }
+	local found = false
+
+	if obj.get_luaentity then
+		local entity = obj:get_luaentity ()
+
+		if entity and entity.name then
+			local def = minetest.registered_entities[entity.name]
+
+			if def and type (def.collisionbox) == "table" then
+
+				dims = { def.collisionbox[1] or -0.5,
+							def.collisionbox[2] or -0.5,
+							def.collisionbox[3] or -0.5,
+							def.collisionbox[4] or 0.5,
+							def.collisionbox[5] or 0.5,
+							def.collisionbox[6] or 0.5 }
+
+				found = true
+			end
+		end
+	end
+
+	if not found then
+		local props = obj:get_properties ()
+		if props and props.collisionbox and type (props.collisionbox) == "table" then
+
+			dims = { props.collisionbox[1] or -0.5,
+						props.collisionbox[2] or -0.5,
+						props.collisionbox[3] or -0.5,
+						props.collisionbox[4] or 0.5,
+						props.collisionbox[5] or 0.5,
+						props.collisionbox[6] or 0.5 }
+		end
+	end
+
+	dims[1] = math.min (dims[1], dims[3])
+	dims[3] = dims[1]
+	dims[4] = math.max (dims[4], dims[6])
+	dims[6] = dims[4]
+
+	if (dims[3] - dims[1]) < 1 then
+		dims[1] = -0.5
+		dims[3] = -0.5
+		dims[4] = 0.5
+		dims[6] = 0.5
+	end
+
+	return dims
+end
+
+
+
+local function get_entity (pos)
+	local objects = minetest.get_objects_inside_radius (pos, 2.0)
+
+	if #objects > 0 then
+		for _, obj in ipairs (objects) do
+			if obj.get_pos then
+				if obj:is_player () then
+					local epos =  vector.round (obj:get_pos ())
+
+					if epos.x == pos.x and epos.z == pos.z and
+							(epos.y == pos.y or epos.y == pos.y - 1) then
+						return 1
+					end
+				end
+
+				if not is_drop (obj) then
+					local epos =  vector.new (obj:get_pos ())
+					local dims = get_entity_dims (obj)
+
+					if pos.x >= (epos.x + dims[1]) and pos.x <= (epos.x + dims[4]) and
+							pos.y >= (epos.y + dims[2]) and pos.y <= (epos.y + dims[5]) and
+							pos.z >= (epos.z + dims[3]) and pos.z <= (epos.z + dims[6]) then
+						return 2
+					end
+				end
+			end
+		end
+	end
+
+	return nil
+end
+
+
+
+local function camera_scan (pos, resolution, distance)
+	local node = utils.get_far_node (pos)
+	local image = { }
+
+	for y = 1, resolution, 1 do
+		image[y] = { }
+
+		for x = 1, resolution, 1 do
+			image[y][x] = "000000"
+		end
+	end
+
+	if node then
+		local dir = vector.multiply (minetest.facedir_to_dir (node.param2), -1)
+		local last_pos = nil
+		local last_color = "000000"
+		local view = (distance * 1.414213562) / resolution
+
+		for dist = distance, 1, -1 do
+			local scale = dist / distance
+
+			for y = 1, resolution, 1 do
+				for x = 1, resolution, 1 do
+					local horz = (x - (resolution / 2)) * scale * view
+					local vert = (y - (resolution / 2)) * scale * view
+
+					local tpos = nil
+					if dir.x ~= 0 then
+						tpos = vector.round ({ x = (dist * dir.x) + pos.x, y = pos.y - vert, z = horz + pos.z })
+					else
+						tpos = vector.round ({ x = horz + pos.x, y = pos.y - vert, z = (dist * dir.z) + pos.z })
+					end
+
+
+					if last_pos and vector.equals (last_pos, tpos) then
+						image[y][x] = last_color
+					else
+						local entity = get_entity (tpos)
+
+						if entity == 1 then
+							local color = (((distance - dist) / distance) * 98) + 30
+
+							last_color = string.format ("00%02X00", color)
+							image[y][x] = last_color
+							last_pos = tpos
+						elseif entity == 2 then
+							local color = (((distance - dist) / distance) * 98) + 30
+
+							last_color = string.format ("0000%02X", color)
+							image[y][x] = last_color
+							last_pos = tpos
+						else
+							local node = utils.get_far_node (tpos)
+
+							if node and node.name ~= "air" then
+								local color = (((distance - dist) / distance) * 98) + 30
+
+								last_color = string.format ("%02X%02X%02X", color, color, color)
+								image[y][x] = last_color
+								last_pos = tpos
+							else
+								last_pos = nil
+							end
+						end
+					end
+				end
+			end
+		end
+	end
+
+	return image
+end
+
+
+
+local function send_scan (pos)
+	local meta = minetest.get_meta (pos)
+
+	if meta then
+		local channel = meta:get_string ("channel")
+
+		if channel:len () > 0 then
+			local image = camera_scan (pos,
+												tonumber (meta:get_string ("resolution")),
+												tonumber (meta:get_string ("distance")))
+
+			utils.digilines_receptor_send (pos,
+													 utils.digilines_default_rules,
+													 channel,
+													 image)
+		end
+
+
+	end
+end
+
+
+
+local function after_place_node (pos, placer, itemstack, pointed_thing)
+	local meta = minetest.get_meta (pos)
+	local spec =
+	"formspec_version[3]\n"..
+	"size[8.5,5.5;true]\n"..
+	"field[1.0,1.0;4.0,0.8;channel;Channel;${channel}]\n"..
+	"button[5.5,1.0;2.0,0.8;setchannel;Set]\n"..
+	"field[1.0,2.5;4.0,0.8;distance;Distance;${distance}]\n"..
+	"button[5.5,2.5;2.0,0.8;setdistance;Set]\n"..
+	"field[1.0,4.0;4.0,0.8;resolution;Resolution;${resolution}]\n"..
+	"button[5.5,4.0;2.0,0.8;setresolution;Set]\n"
+
+	meta:set_string ("formspec", spec)
+	meta:set_string ("distance", "5")
+	meta:set_string ("resolution", "16")
+
+	-- If return true no item is taken from itemstack
+	return false
+end
+
+
+
+local function after_place_node_locked (pos, placer, itemstack, pointed_thing)
+	after_place_node (pos, placer, itemstack, pointed_thing)
+
+	if placer and placer:is_player () then
+		local meta = minetest.get_meta (pos)
+
+		meta:set_string ("owner", placer:get_player_name ())
+		meta:set_string ("infotext", "Camera (owned by "..placer:get_player_name ()..")")
+	end
+
+	-- If return true no item is taken from itemstack
+	return false
+end
+
+
+
+local function on_receive_fields (pos, formname, fields, sender)
+	if not utils.can_interact_with_node (pos, sender) then
+		return
+	end
+
+	if fields.setchannel then
+		local meta = minetest.get_meta (pos)
+
+		if meta then
+			meta:set_string ("channel", fields.channel)
+		end
+	end
+
+	if fields.setdistance then
+		local meta = minetest.get_meta (pos)
+
+		if meta then
+			local distance = math.min (math.max (tonumber (fields.distance) or 1, 1), 16)
+			fields.distance = tostring (distance)
+
+			meta:set_string ("distance", tostring (distance))
+		end
+	end
+
+	if fields.setresolution then
+		local meta = minetest.get_meta (pos)
+
+		if meta then
+			local resolution = math.max (tonumber (fields.resolution) or 1, 1)
+			fields.resolution = tostring (resolution)
+
+			meta:set_string ("resolution", tostring (resolution))
+		end
+	end
+end
+
+
+
+local function can_dig (pos, player)
+	if not utils.can_interact_with_node (pos, player) then
+		return false
+	end
+
+	return true
+end
+
+
+
+local function on_blast (pos, intensity)
+	local meta = minetest.get_meta (pos)
+
+	if meta then
+		if intensity >= 1.0 then
+			minetest.remove_node (pos)
+
+		else -- intensity < 1.0
+			local node = minetest.get_node_or_nil (pos)
+			if node then
+				local items = minetest.get_node_drops (node, nil)
+
+				if items and #items > 0 then
+					local stack = ItemStack (items[1])
+
+					if stack then
+						preserve_metadata (pos, node, meta, { stack })
+						utils.item_drop (stack, nil, pos)
+						minetest.remove_node (pos)
+					end
+				end
+			end
+		end
+	end
+end
+
+
+
+local function on_rightclick (pos, node, clicker, itemstack, pointed_thing)
+	if not utils.can_interact_with_node (pos, clicker) then
+		if clicker and clicker:is_player () then
+			local owner = "<unknown>"
+			local meta = minetest.get_meta (pos)
+
+			if meta then
+				owner = meta:get_string ("owner")
+			end
+
+			local spec =
+			"formspec_version[3]"..
+			"size[8.0,4.0,false]"..
+			"label[1.0,1.0;Owned by "..minetest.formspec_escape (owner).."]"..
+			"button_exit[3.0,2.0;2.0,1.0;close;Close]"
+
+			minetest.show_formspec (clicker:get_player_name (),
+											"lwcomponents:component_privately_owned",
+											spec)
+		end
+	end
+
+	return itemstack
+end
+
+
+
+local function digilines_support ()
+	if utils.digilines_supported then
+		return
+		{
+			wire =
+			{
+				rules = utils.digilines_default_rules,
+			},
+
+			effector =
+			{
+				action = function (pos, node, channel, msg)
+					local meta = minetest.get_meta(pos)
+
+					if meta then
+						local this_channel = meta:get_string ("channel")
+
+						if this_channel ~= "" and this_channel == channel and
+							type (msg) == "string" then
+
+							local m = { }
+							for w in string.gmatch(msg, "[^%s]+") do
+								m[#m + 1] = w
+							end
+
+							if m[1] == "scan" then
+								send_scan (pos)
+
+							elseif m[1] == "distance" then
+								meta:set_string ("distance", tostring (tonumber (m[2] or 5) or 5))
+
+							elseif m[1] == "resolution" then
+								meta:set_string ("resolution", tostring (tonumber (m[2] or 16) or 16))
+
+							end
+						end
+					end
+				end,
+			}
+		}
+	end
+
+	return nil
+end
+
+
+
+minetest.register_node("lwcomponents:camera", {
+	description = S("Camera"),
+	tiles = { "lwcamera.png", "lwcamera.png", "lwcamera.png",
+				 "lwcamera.png", "lwcamera.png", "lwcamera_lens.png"},
+	is_ground_content = false,
+	groups = { cracky = 3 },
+	sounds = default.node_sound_stone_defaults (),
+	paramtype = "none",
+	param1 = 0,
+	paramtype2 = "facedir",
+	param2 = 0,
+	floodable = false,
+	drop = "lwcomponents:camera",
+	_digistuff_channelcopier_fieldname = "channel",
+
+	digiline = digilines_support (),
+
+	on_receive_fields = on_receive_fields,
+	can_dig = can_dig,
+	after_place_node = after_place_node,
+	on_blast = on_blast,
+	on_rightclick = on_rightclick
+})
+
+
+
+minetest.register_node("lwcomponents:camera_locked", {
+	description = S("Camera (locked)"),
+	tiles = { "lwcamera.png", "lwcamera.png", "lwcamera.png",
+				 "lwcamera.png", "lwcamera.png", "lwcamera_lens.png"},
+	is_ground_content = false,
+	groups = { cracky = 3 },
+	sounds = default.node_sound_stone_defaults (),
+	paramtype = "none",
+	param1 = 0,
+	paramtype2 = "facedir",
+	param2 = 0,
+	floodable = false,
+	drop = "lwcomponents:camera_locked",
+	_digistuff_channelcopier_fieldname = "channel",
+
+	digiline = digilines_support (),
+
+	on_receive_fields = on_receive_fields,
+	can_dig = can_dig,
+	after_place_node = after_place_node_locked,
+	on_blast = on_blast,
+	on_rightclick = on_rightclick
+})
+
+
+
+end -- utils.digilines_supported
+
+
+
+--

cannon_shell.lua

@@ -0,0 +1,293 @@
+local utils = ...
+local S = utils.S
+
+
+
+--[[
+on_step info
+
+info.touching_ground = bool
+info.standing_on_object = bool
+info.collides = bool
+
+
+info.collisions[n].type = "node"
+info.collisions[n].node_pos = vector
+info.collisions[n].old_velocity = vector
+info.collisions[n].now_velocity = vector
+info.collisions[n].axis = "x" | "y" | "z" - axis hit
+
+or
+
+info.collisions[n].type = "object"
+info.collisions[n].object = userdata
+info.collisions[n].old_velocity = vector
+info.collisions[n].now_velocity = vector
+info.collisions[n].axis = "x" | "y" | "z" - axis hit
+]]
+
+
+
+local function get_adjacent_node (collision_info, spawn_pos)
+	if vector.equals (collision_info.node_pos, spawn_pos) then
+		return collision_info.node_pos
+	end
+
+	local adj = { x = 0, y = 0, z = 0 }
+
+	if collision_info.axis == "x" then
+		adj.x = (collision_info.old_velocity.x > 0 and -1) or 1
+	elseif collision_info.axis == "y" then
+		adj.y = (collision_info.old_velocity.y > 0 and -1) or 1
+	elseif collision_info.axis == "z" then
+		adj.z = (collision_info.old_velocity.z > 0 and -1) or 1
+	end
+
+	local pos = vector.new (collision_info.node_pos)
+	local node = utils.get_far_node (pos)
+	local def = minetest.registered_nodes[node and node.name or nil]
+
+	while (node and node.name ~= "air") and (def and not def.buildable_to) do
+		local next_pos = vector.add (pos, adj)
+
+		if vector.equals (next_pos, spawn_pos) then
+			return pos
+		end
+
+		pos = next_pos
+		node = utils.get_far_node (pos)
+		def = minetest.registered_nodes[node and node.name or nil]
+	end
+
+	return pos
+end
+
+
+
+local function register_shell (name, description, texture, inventory_image,
+										 stack_max, shell_speed, explode_func)
+
+	minetest.register_entity (name.."_entity", {
+		initial_properties = {
+			physical = true,
+			collide_with_objects = true,
+			collisionbox = { -0.25, -0.125, -0.25, 0.25, 0.125, 0.25 },
+			pointable = false,
+			visual_size = { x = 0.7, y = 0.7, z = 0.7 },
+			visual = "mesh",
+			mesh = "lwcomponents_shell.obj",
+			textures = { texture },
+			use_texture_alpha = false,
+			is_visible = true,
+			makes_footstep_sound = false,
+			automatic_face_movement_dir = false,
+			automatic_face_movement_max_rotation_per_sec = false,
+			automatic_rotate = 0,
+			backface_culling = true,
+			damage_texture_modifier = "",
+			glow = 0,
+			static_save = false,
+			shaded = true,
+			show_on_minimap = false,
+		},
+
+		on_activate = function (self, staticdata, dtime_s)
+			if not self.spawn_pos then
+				self.spawn_pos = vector.new (self.object:get_pos ())
+			end
+
+			if not self.time_lived then
+				self.time_lived = 0
+			end
+
+			if not self.shell_speed then
+				self.shell_speed = shell_speed
+			end
+
+			self.staticdata = staticdata
+		end,
+
+		get_staticdata = function (self)
+			return self.staticdata
+		end,
+
+		on_step = function (self, dtime, info)
+			local explode_pos = nil
+
+			self.object:set_rotation (vector.dir_to_rotation (self.object:get_velocity ()))
+
+			if self.time_lived then
+				self.time_lived = self.time_lived + dtime
+
+				if self.time_lived > self.shell_speed then
+					self.object:remove ()
+
+					return
+				end
+			end
+
+			if info.collides then
+				--For each collision that was found in reverse order
+				for i = #info.collisions, 1, -1 do
+					local c = info.collisions[i]
+
+					if c.type == "node" then
+						local node = utils.get_far_node (c.node_pos)
+
+						if node and node.name ~= "air" then
+							local def = minetest.registered_nodes[node.name]
+
+							if def and def.walkable then
+								-- adjacent for explosion
+								explode_pos = get_adjacent_node (c, self.spawn_pos)
+
+--minetest.log ("action", "Shell on node "..node.name.." at "..minetest.pos_to_string (explode_pos)..
+							--" node at "..minetest.pos_to_string (c.node_pos))
+
+								break
+							end
+						end
+
+						if not explode_pos then
+							self.object:set_velocity (c.old_velocity)
+						end
+
+					elseif c.type == "object" then
+						-- explode at this pos
+						if c.object:get_armor_groups ().immortal then
+							self.object:set_velocity (c.old_velocity)
+						else
+							explode_pos = vector.new (c.object:get_pos ())
+
+--minetest.log ("action", "Shell on entity "..c.object:get_luaentity ().name.." at "..minetest.pos_to_string (explode_pos))
+
+							break
+						end
+					end
+				end
+			end
+
+			if explode_pos then
+				self.object:remove ()
+
+				explode_func (explode_pos)
+			end
+		end,
+
+		on_punch = function (self, puncher, time_from_last_punch, tool_capabilities, dir)
+			return true
+		end,
+	})
+
+	minetest.register_craftitem (name, {
+		description = description,
+		short_description = description,
+		groups = { },
+		inventory_image = inventory_image,
+		wield_image = inventory_image,
+		stack_max = stack_max,
+	})
+
+
+	lwcomponents.register_spawner (name,
+	function (spawn_pos, itemstack, owner, spawner_pos, spawner_dir, force)
+		if not itemstack:is_empty() then
+			local def = minetest.registered_entities[name.."_entity"]
+
+			if def then
+				local obj = minetest.add_entity (spawn_pos, name.."_entity")
+
+				if obj then
+					obj:set_armor_groups ({ immortal = 1 })
+					obj:set_acceleration ({ x = 0, y = -9.81, z = 0 })
+					obj:set_rotation (vector.dir_to_rotation (vector.multiply (spawner_dir, shell_speed)))
+					obj:set_velocity (vector.multiply (spawner_dir, shell_speed))
+
+					local luaent = obj:get_luaentity ()
+
+					if luaent then
+						luaent.spawn_pos = { x = spawn_pos.x, y = spawn_pos.y, z = spawn_pos.z }
+						luaent.time_lived = 0
+						luaent.shell_speed = shell_speed
+					end
+
+					return obj, false
+				end
+			end
+		end
+
+		return nil, false
+	end)
+end
+
+
+register_shell ("lwcomponents:cannon_shell",
+	S("Shell"),
+	"lwcannon_shell.png",
+	"lwcannon_shell_item.png",
+	99,
+	25,
+	function (pos)
+		utils.boom (pos,
+						2, -- node_radius
+						70, -- node_chance in 100
+						2, -- fire_radius
+						5, -- fire_chance in 100
+						4, -- entity_radius
+						20, -- entity_damage
+						false, -- disable_drops
+						nil, -- node_filter
+						false, -- burn_all
+						nil) -- sound
+	end)
+
+
+register_shell ("lwcomponents:cannon_soft_shell",
+	S("Soft Shell"),
+	"lwcannon_soft_shell.png",
+	"lwcannon_soft_shell_item.png",
+	99,
+	25,
+	function (pos)
+		utils.boom (pos,
+						 2, -- node_radius
+						 50, -- node_chance in 100
+						 2, -- fire_radius
+						 5, -- fire_chance in 100
+						 4, -- entity_radius
+						 20, -- entity_damage
+						 false, -- disable_drops
+						 {
+							 buildable_to = true,
+							 buildable_to_undefined = false,
+						 }, -- node_filter
+						 false, -- burn_all
+						 nil) -- sound
+	end)
+
+
+if minetest.global_exists ("fire") then
+register_shell ("lwcomponents:cannon_fire_shell",
+	S("Fire Shell"),
+	"lwcannon_fire_shell.png",
+	"lwcannon_fire_shell_item.png",
+	99,
+	25,
+	function (pos)
+		utils.boom (pos,
+						2, -- node_radius
+						0, -- node_chance in 100
+						2, -- fire_radius
+						70, -- fire_chance in 100
+						4, -- entity_radius
+						20, -- entity_damage
+						false, -- disable_drops
+						nil, -- node_filter
+						true, -- burn_all
+						nil) -- sound
+	end)
+end
+
+
+
+--

change.log

@@ -26,3 +26,79 @@ v0.1.3
 
 v0.1.4
 *	Bug fix to spawning owned mobs.
+
+
+v0.1.5
+*	Added setting Spawn mobs.
+*	Added lwcomponents.register_spawner api.
+
+
+v0.1.6
+*	Added holograms.
+*	Added breakers.
+*	Added fans.
+
+
+v0.1.7
+*	Fixed fan description.
+*	Breakers can break nodes up to 5 forward with digilines message.
+*	Added deployers.
+
+
+v0.1.8
+*	Changed detector digilines message to single message with list of
+	detected items.
+*	Added conduits.
+*	Fixed fans not blowing upward.
+*	Made changes to lwcomponents.register_spawner api - called function
+	must now set velocity, can use force parameter.
+*	Removed spawning from this mod. Created lwcomponents_spawners to
+	register spawers.
+
+
+v0.1.9
+*	Fixed infotext on various nodes.
+
+
+v0.1.10
+*	Added cannons.
+
+
+v0.1.11
+*	Fix to breakers (?).
+*	Added position aiming to cannons.
+
+
+v0.1.12
+*	Added sensitivity option for game controller in cannons.
+*	Added cannon shells.
+*	Fixed bug in utils.is_creative.
+*	Increased cannon pitch to -20 to 70.
+
+
+v0.1.13
+*	Removed optional dependency lwdrops.
+
+
+v0.1.14
+*	Calls on_drop when item is dropped.
+
+
+v0.1.15
+*	Fixed bug call to clear_map in fan on_blast.
+*	Added pistons.
+
+
+v0.1.16
+*	Fixed piston interaction with non-walkable nodes.
+
+
+v0.1.17
+*	Fixed unintended global variable in pistons.lua.
+
+v0.1.18
+*	Added mesecons through wire.
+
+
+v0.1.19
+*	Added camera.

collector.lua

@@ -400,7 +400,9 @@ local function digilines_support ()
 					if meta then
 						local this_channel = meta:get_string ("channel")
 
-						if this_channel ~= "" and this_channel == channel then
+						if this_channel ~= "" and this_channel == channel and
+							type (msg) == "string" then
+
 							local m = { }
 							for w in string.gmatch(msg, "[^%s]+") do
 								m[#m + 1] = w

conduit.lua

@@ -0,0 +1,748 @@
+local utils, mod_storage = ...
+local S = utils.S
+
+
+
+if utils.digilines_supported or utils.mesecon_supported then
+
+
+
+local transfer_rate = 0.1
+local conduit_interval = 1.0
+local conduit_connections = utils.connections:new (mod_storage, "conduit_connections")
+
+
+
+local function get_target_list (pos)
+	local tlist = conduit_connections:get_connected_ids (pos)
+	local list = { }
+
+	for i = 1, #tlist do
+		if tlist[i].pos.x ~= pos.x or
+			tlist[i].pos.y ~= pos.y or
+			tlist[i].pos.y ~= pos.y then
+
+			list[#list + 1] = tlist[i].id
+		end
+	end
+
+	return list
+end
+
+
+
+local function send_targets_message (pos)
+	if utils.digilines_supported then
+		local meta = minetest.get_meta (pos)
+
+		if meta then
+			local channel = meta:get_string ("channel")
+
+			if channel:len () > 0 then
+				utils.digilines_receptor_send (pos,
+														 utils.digilines_default_rules,
+														 channel,
+														 { action = "targets",
+															targets = get_target_list (pos) })
+			end
+		end
+	end
+end
+
+
+
+local function deliver_slot (pos, slot)
+	local meta = minetest.get_meta (pos)
+
+	if meta then
+		local inv = meta:get_inventory ()
+		local transfer_data = minetest.deserialize (meta:get_string ("transfer_data"))
+
+		if inv then
+			local item = inv:get_stack ("transfer", slot)
+
+			if transfer_data[slot] and item and not item:is_empty () then
+				local tmeta = minetest.get_meta (transfer_data[slot].pos)
+
+				if tmeta then
+					local tinv = tmeta:get_inventory ()
+
+					if tinv then
+						tinv:add_item ("main", item)
+
+						--send_conduit_message (pos, target, slot)
+					end
+				end
+			end
+
+			transfer_data[slot] = nil
+			meta:set_string ("transfer_data", minetest.serialize (transfer_data))
+			inv:set_stack ("transfer", slot, nil)
+		end
+	end
+end
+
+
+
+local function run_deliveries (pos)
+	local meta = minetest.get_meta (pos)
+
+	if meta then
+		local inv = meta:get_inventory ()
+		local transfer_data = minetest.deserialize (meta:get_string ("transfer_data")) or { }
+
+		if inv then
+			local slots = inv:get_size ("transfer")
+			local tm = minetest.get_us_time ()
+
+			for i = 1, slots do
+				if transfer_data[i] and
+					(transfer_data[i].due <= tm or
+					 tm < (transfer_data[i].due - 1000000000)) then
+
+					deliver_slot (pos, i)
+				end
+			end
+		end
+
+		return not inv:is_empty ("transfer")
+	end
+
+	return false
+end
+
+
+
+local function deliver_all (pos)
+	local meta = minetest.get_meta (pos)
+
+	if meta then
+		local inv = meta:get_inventory ()
+
+		if inv then
+			local slots = inv:get_size ("transfer")
+
+			for i = 1, slots do
+				local item = inv:get_stack ("transfer", i)
+
+				if item and not item:is_empty () then
+					deliver_slot (pos, i)
+				end
+			end
+		end
+
+		meta:set_string ("transfer_data", minetest.serialize({ }))
+		inv:set_list ("transfer", { })
+	end
+end
+
+
+
+local function delivered_earliest (pos)
+	local meta = minetest.get_meta (pos)
+
+	if meta then
+		local inv = meta:get_inventory ()
+		local transfer_data = minetest.deserialize (meta:get_string ("transfer_data")) or { }
+
+		if inv then
+			local slots = inv:get_size ("transfer")
+			local slot = 0
+			local tm = 0
+
+			for i = 1, slots do
+				if transfer_data[i] and transfer_data[i].due < tm then
+					slot = i
+					tm = transfer_data[i].due
+				end
+			end
+
+			if slot > 0 then
+				deliver_slot (pos, slot)
+			end
+		end
+	end
+end
+
+
+
+local function get_transfer_free_slot (pos)
+	local meta = minetest.get_meta (pos)
+
+	if meta then
+		local inv = meta:get_inventory ()
+
+		if inv then
+			local slots = inv:get_size ("transfer")
+
+			for i = 1, slots do
+				local item = inv:get_stack ("transfer", i)
+
+				if not item or item:is_empty () then
+					return i
+				end
+			end
+		end
+	end
+
+	return 0
+end
+
+
+
+local function add_to_send_list (pos, item, destpos, distance)
+	local slot = get_transfer_free_slot (pos)
+
+	while slot < 1 do
+		delivered_earliest (pos)
+	end
+
+	local meta = minetest.get_meta (pos)
+
+	if meta then
+		local inv = meta:get_inventory ()
+		local transfer_data = minetest.deserialize (meta:get_string ("transfer_data")) or { }
+
+		if inv then
+			transfer_data[slot] =
+			{
+				pos = destpos,
+				due = minetest.get_us_time () + (transfer_rate * 1000000 * distance)
+			}
+
+			inv:add_item ("transfer", item)
+
+			meta:set_string ("transfer_data", minetest.serialize (transfer_data))
+
+			local timer = minetest.get_node_timer (pos)
+
+			if not timer:is_started () then
+				timer:start (conduit_interval)
+			end
+		end
+	end
+end
+
+
+
+local function send_to_target (pos, target, slot)
+	local meta = minetest.get_meta (pos)
+
+	if meta then
+		local inv = meta:get_inventory ()
+
+		target = (target and tostring (target)) or meta:get_string ("target")
+
+		if inv and target:len () > 0 then
+			if not slot then
+				local slots = inv:get_size ("main")
+
+				for i = 1, slots do
+					local stack = inv:get_stack ("main", i)
+
+					if not stack:is_empty () and stack:get_count () > 0 then
+						slot = i
+						break
+					end
+				end
+
+			elseif type (slot) == "string" then
+				local name = slot
+				slot = nil
+
+				local slots = inv:get_size ("main")
+
+				for i = 1, slots do
+					local stack = inv:get_stack ("main", i)
+
+					if not stack:is_empty () and stack:get_count () > 0 then
+						if name == stack:get_name () then
+							slot = i
+							break
+						end
+					end
+				end
+
+			else
+				slot = tonumber (slot)
+
+			end
+
+			if slot then
+				local stack = inv:get_stack ("main", slot)
+
+				if not stack:is_empty () and stack:get_count () > 0 then
+					local name = stack:get_name ()
+					local item = ItemStack (stack)
+
+					if item then
+						item:set_count (1)
+
+						local tpos, distance = conduit_connections:is_connected (pos, target)
+
+						if tpos then
+							local tmeta = minetest.get_meta (tpos)
+
+							if tmeta then
+								local tinv = tmeta:get_inventory ()
+
+								if tinv and tinv:room_for_item ("main", item) then
+									add_to_send_list (pos, item, tpos, distance)
+
+									stack:set_count (stack:get_count () - 1)
+									inv:set_stack ("main", slot, stack)
+
+									--send_conduit_message (pos, target, slot)
+
+									return true, target, slot
+								end
+							end
+						end
+					end
+				end
+			end
+		end
+	end
+
+	return false
+end
+
+
+
+local function run_conduit (pos)
+	local meta = minetest.get_meta (pos)
+	local automatic = false
+
+	if meta then
+		automatic = meta:get_string ("automatic") == "true"
+	end
+
+	if automatic then
+		send_to_target (pos)
+	end
+
+	return run_deliveries (pos) or automatic
+end
+
+
+
+local function get_formspec (pos)
+	local meta = minetest.get_meta (pos)
+	local automatic = "false"
+
+	if meta then
+		automatic = meta:get_string ("automatic")
+	end
+
+	return
+		"formspec_version[3]\n"..
+		"size[11.75,12.25;true]\n"..
+		"field[1.0,1.5;3.0,0.8;channel;Channel;${channel}]\n"..
+		"button[4.2,1.5;1.5,0.8;setchannel;Set]\n"..
+		"field[1.0,3.0;3.0,0.8;target;Target;${target}]\n"..
+		"button[4.2,3.0;1.5,0.8;settarget;Set]\n"..
+		"checkbox[1.0,4.5;automatic;Automatic;"..automatic.."]\n"..
+		"list[context;main;6.0,1.0;4,4;]\n"..
+		"list[current_player;main;1.0,6.5;8,4;]\n"..
+		"listring[]"
+end
+
+
+
+local function on_construct (pos)
+	conduit_connections:add_node (pos)
+end
+
+
+
+local function on_destruct (pos)
+	deliver_all (pos)
+	conduit_connections:remove_node (pos)
+end
+
+
+
+local function after_place_node (pos, placer, itemstack, pointed_thing)
+	local meta = minetest.get_meta (pos)
+	local spec =
+	"formspec_version[3]"..
+	"size[7.0,3.8]"..
+	"field[0.5,1.0;6.0,0.8;channel;Channel;${channel}]"..
+	"button[2.0,2.3;3.0,0.8;setchannel;Set]"
+
+	meta:set_string ("inventory", "{ main = { }, transfer = { } }")
+	meta:set_string ("formspec", spec)
+	meta:set_string ("transfer_data", minetest.serialize({ }))
+	meta:set_string ("automatic", "false")
+
+	local inv = meta:get_inventory ()
+
+	inv:set_size ("main", 16)
+	inv:set_width ("main", 4)
+
+	inv:set_size ("transfer", 32)
+	inv:set_width ("transfer", 8)
+
+	-- If return true no item is taken from itemstack
+	return false
+end
+
+
+
+local function after_place_node_locked (pos, placer, itemstack, pointed_thing)
+	after_place_node (pos, placer, itemstack, pointed_thing)
+
+	if placer and placer:is_player () then
+		local meta = minetest.get_meta (pos)
+
+		meta:set_string ("owner", placer:get_player_name ())
+		meta:set_string ("infotext", "Conduit (owned by "..placer:get_player_name ()..")")
+	end
+
+	-- If return true no item is taken from itemstack
+	return false
+end
+
+
+
+local function can_dig (pos, player)
+	if not utils.can_interact_with_node (pos, player) then
+		return false
+	end
+
+	local meta = minetest.get_meta (pos)
+
+	if meta then
+		local inv = meta:get_inventory ()
+
+		if inv then
+			if not inv:is_empty ("main") then
+				return false
+			end
+		end
+	end
+
+	return true
+end
+
+
+
+local function on_receive_fields (pos, formname, fields, sender)
+	if not utils.can_interact_with_node (pos, sender) then
+		return
+	end
+
+	if fields.setchannel then
+		local meta = minetest.get_meta (pos)
+
+		if meta then
+			if tostring (fields.channel):len () > 0 then
+				if meta:get_string ("channel"):len () < 1 then
+					meta:set_string ("formspec", get_formspec (pos))
+				end
+
+				meta:set_string ("channel", fields.channel)
+
+				conduit_connections:set_id (pos, tostring (fields.channel))
+
+			elseif meta:get_string ("channel"):len () > 0 then
+				if can_dig (pos, sender) ~= false then
+					local spec =
+					"formspec_version[3]"..
+					"size[7.0,3.8]"..
+					"field[0.5,1.0;6.0,0.8;channel;Channel;${channel}]"..
+					"button[2.0,2.3;3.0,0.8;setchannel;Set]"
+
+					meta:set_string ("channel", fields.channel)
+
+					meta:set_string ("formspec", spec)
+
+					conduit_connections:set_id (pos, nil)
+
+				elseif sender and sender:is_player () then
+					fields.channel = meta:get_string ("channel")
+
+					local spec =
+					"formspec_version[3]"..
+					"size[8.0,4.0,false]"..
+					"label[2.5,1.0;Conduit not empty]"..
+					"button_exit[3.0,2.0;2.0,1.0;close;Close]"
+
+					minetest.show_formspec (sender:get_player_name (),
+													"lwcomponents:conduit_not_empty",
+													spec)
+
+				end
+			end
+		end
+	end
+
+	if fields.settarget then
+		local meta = minetest.get_meta (pos)
+
+		if meta then
+			meta:set_string ("target", fields.target)
+		end
+	end
+
+	if fields.automatic then
+		local meta = minetest.get_meta (pos)
+
+		if meta then
+			meta:set_string ("automatic", fields.automatic)
+			meta:set_string ("formspec", get_formspec (pos))
+
+			local timer = minetest.get_node_timer (pos)
+
+			if not timer:is_started () then
+				timer:start (conduit_interval)
+			end
+		end
+	end
+end
+
+
+
+local function on_blast (pos, intensity)
+	local meta = minetest.get_meta (pos)
+
+	if meta then
+		if intensity >= 1.0 then
+			local inv = meta:get_inventory ()
+
+			if inv then
+				local slots = inv:get_size ("main")
+
+				for slot = 1, slots do
+					local stack = inv:get_stack ("main", slot)
+
+					if stack and not stack:is_empty () then
+						if math.floor (math.random (0, 5)) == 3 then
+							utils.item_drop (stack, nil, pos)
+						else
+							utils.on_destroy (stack)
+						end
+					end
+				end
+			end
+
+			on_destruct (pos)
+			minetest.remove_node (pos)
+
+		else -- intensity < 1.0
+			local inv = meta:get_inventory ()
+
+			if inv then
+				local slots = inv:get_size ("main")
+
+				for slot = 1, slots do
+					local stack = inv:get_stack ("main", slot)
+
+					if stack and not stack:is_empty () then
+						utils.item_drop (stack, nil, pos)
+					end
+				end
+			end
+
+			local node = minetest.get_node_or_nil (pos)
+			if node then
+				local items = minetest.get_node_drops (node, nil)
+
+				if items and #items > 0 then
+					local stack = ItemStack (items[1])
+
+					if stack then
+						preserve_metadata (pos, node, meta, { stack })
+						utils.item_drop (stack, nil, pos)
+						on_destruct (pos)
+						minetest.remove_node (pos)
+					end
+				end
+			end
+		end
+	end
+end
+
+
+
+local function on_rightclick (pos, node, clicker, itemstack, pointed_thing)
+	if not utils.can_interact_with_node (pos, clicker) then
+		if clicker and clicker:is_player () then
+			local owner = "<unknown>"
+			local meta = minetest.get_meta (pos)
+
+			if meta then
+				owner = meta:get_string ("owner")
+			end
+
+			local spec =
+			"formspec_version[3]"..
+			"size[8.0,4.0,false]"..
+			"label[1.0,1.0;Owned by "..minetest.formspec_escape (owner).."]"..
+			"button_exit[3.0,2.0;2.0,1.0;close;Close]"
+
+			minetest.show_formspec (clicker:get_player_name (),
+											"lwcomponents:component_privately_owned",
+											spec)
+		end
+	end
+
+	return itemstack
+end
+
+
+
+local function on_timer (pos, elapsed)
+	return run_conduit (pos)
+end
+
+
+
+local function digilines_support ()
+	if utils.digilines_supported then
+		return
+		{
+			wire =
+			{
+				rules = utils.digilines_default_rules,
+			},
+
+			effector =
+			{
+				action = function (pos, node, channel, msg)
+					local meta = minetest.get_meta(pos)
+
+					if meta then
+						local this_channel = meta:get_string ("channel")
+
+						if this_channel ~= "" and this_channel == channel then
+							if type (msg) == "string" then
+								local m = { }
+								for w in string.gmatch(msg, "[^%s]+") do
+									m[#m + 1] = w
+								end
+
+								if m[1] == "target" then
+									meta:set_string ("target", (m[2] and tostring (m[2])) or "")
+
+								elseif m[1] == "targets" then
+									send_targets_message (pos)
+
+								elseif m[1] == "transfer" then
+									send_to_target (pos)
+
+								end
+
+							elseif type (msg) == "table" then
+								if msg.action and tostring (msg.action) == "transfer" then
+									send_to_target (pos, msg.target, msg.slot or msg.item)
+								end
+
+							end
+						end
+					end
+				end,
+			}
+		}
+	end
+
+	return nil
+end
+
+
+
+local function mesecon_support ()
+	if utils.mesecon_supported then
+		return
+		{
+			effector =
+			{
+				rules = utils.mesecon_flat_rules,
+
+				action_on = function (pos, node)
+					send_to_target (pos)
+				end
+			}
+		}
+	end
+
+	return nil
+end
+
+
+
+minetest.register_node("lwcomponents:conduit", {
+	description = S("Conduit"),
+	drawtype = "glasslike_framed",
+	tiles = { "lwconduit_edge.png", "lwconduit.png" },
+	is_ground_content = false,
+	groups = { cracky = 3 },
+	sounds = default.node_sound_stone_defaults (),
+	paramtype = "none",
+	param1 = 0,
+	paramtype2 = "none",
+	param2 = 0,
+	floodable = false,
+	_digistuff_channelcopier_fieldname = "channel",
+
+	mesecons = mesecon_support (),
+	digiline = digilines_support (),
+
+	on_construct = on_construct,
+	on_destruct = on_destruct,
+	on_receive_fields = on_receive_fields,
+	after_place_node = after_place_node,
+	can_dig = can_dig,
+	on_blast = on_blast,
+	on_timer = on_timer,
+	on_rightclick = on_rightclick
+})
+
+
+
+minetest.register_node("lwcomponents:conduit_locked", {
+	description = S("Conduit (locked)"),
+	drawtype = "glasslike_framed",
+	tiles = { "lwconduit_edge.png", "lwconduit.png" },
+	is_ground_content = false,
+	groups = { cracky = 3 },
+	sounds = default.node_sound_stone_defaults (),
+	paramtype = "none",
+	param1 = 0,
+	paramtype2 = "none",
+	param2 = 0,
+	floodable = false,
+	_digistuff_channelcopier_fieldname = "channel",
+
+	mesecons = mesecon_support (),
+	digiline = digilines_support (),
+
+	on_construct = on_construct,
+	on_destruct = on_destruct,
+	on_receive_fields = on_receive_fields,
+	after_place_node = after_place_node_locked,
+	can_dig = can_dig,
+	on_blast = on_blast,
+	on_timer = on_timer,
+	on_rightclick = on_rightclick
+})
+
+
+
+utils.hopper_add_container({
+	{"top", "lwcomponents:conduit", "main"}, -- take items from above into hopper below
+	{"bottom", "lwcomponents:conduit", "main"}, -- insert items below from hopper above
+	{"side", "lwcomponents:conduit", "main"}, -- insert items from hopper at side
+})
+
+
+
+utils.hopper_add_container({
+	{"top", "lwcomponents:conduit_locked", "main"}, -- take items from above into hopper below
+	{"bottom", "lwcomponents:conduit_locked", "main"}, -- insert items below from hopper above
+	{"side", "lwcomponents:conduit_locked", "main"}, -- insert items from hopper at side
+})
+
+
+
+end -- utils.digilines_supported or utils.mesecon_supported

connections.lua

@@ -0,0 +1,300 @@
+
+
+
+local connections = { }
+
+
+
+function connections:new (mod_storage, name)
+	local obj = { }
+
+   setmetatable (obj, self)
+   self.__index = self
+
+   obj.connector_list = { }
+   obj.name = tostring (name)
+   obj.storage = mod_storage
+
+	if mod_storage then
+		local stored = mod_storage:get_string (obj.name)
+
+		if stored == "" then
+			stored = "{ }"
+		end
+
+		obj.connector_list = minetest.deserialize (stored)
+
+		if not obj.connector_list then
+			obj.connector_list = { }
+		end
+	end
+
+	return obj
+end
+
+
+
+function connections:load ()
+	if self.storage then
+		local stored = self.storage:get_string (self.name)
+
+		if stored == "" then
+			stored = "{ }"
+		end
+
+		self.connector_list = minetest.deserialize (stored)
+	end
+end
+
+
+
+function connections:store ()
+	if self.storage then
+		self.storage:set_string (self.name, minetest.serialize (self.connector_list))
+	end
+end
+
+
+
+
+function connections:add_node (pos, id)
+	self.connector_list[minetest.pos_to_string (pos, 0)] =
+	{
+		id = (id and tostring (id)) or nil,
+		checked = false
+	}
+
+	self:store ()
+end
+
+
+
+function connections:remove_node (pos)
+	self.connector_list[minetest.pos_to_string (pos, 0)] = nil
+
+	self:store ()
+end
+
+
+
+function connections:set_id (pos, id)
+	local con = self.connector_list[minetest.pos_to_string (pos, 0)]
+
+	if con then
+		con.id = (id and tostring (id)) or nil
+
+		self:store ()
+
+		return true
+	end
+
+	return false
+end
+
+
+
+local function is_connected (self, pos, id, tally, test_coords)
+	if not id then
+		return nil
+	end
+
+	local con = self.connector_list[minetest.pos_to_string (pos, 0)]
+
+	if con and not con.checked then
+		con.checked = true
+
+		if con.id == id then
+			con.checked = false
+
+			return pos, tally
+		end
+
+		for i = 1, #test_coords do
+			local result, agg = is_connected (self,
+														 {
+															 x = pos.x + test_coords[i].x,
+															 y = pos.y + test_coords[i].y,
+															 z = pos.z + test_coords[i].z
+														 },
+														 id,
+														 tally,
+														 test_coords)
+
+			if result then
+				con.checked = false
+
+				return result, (tally + agg + 1)
+			end
+		end
+
+		con.checked = false
+	end
+
+	return nil, 0
+end
+
+
+
+function connections:is_connected (pos, id)
+	return is_connected (self,
+								pos,
+								tostring (id),
+								0,
+								{
+									{ x =  1, y =  0, z =  0 },
+									{ x = -1, y =  0, z =  0 },
+									{ x =  0, y =  0, z =  1 },
+									{ x =  0, y =  0, z = -1 },
+									{ x =  0, y =  1, z =  0 },
+									{ x =  0, y = -1, z =  0 }
+								})
+end
+
+
+
+function connections:is_connected_horizontal (pos, id)
+	return is_connected (self,
+								pos,
+								tostring (id),
+								0,
+								{
+									{ x =  1, y =  0, z =  0 },
+									{ x = -1, y =  0, z =  0 },
+									{ x =  0, y =  0, z =  1 },
+									{ x =  0, y =  0, z = -1 }
+								})
+end
+
+
+
+function connections:is_connected_vertical (pos, id)
+	return is_connected (self,
+								pos,
+								tostring (id),
+								0,
+								{
+									{ x =  0, y =  1, z =  0 },
+									{ x =  0, y = -1, z =  0 }
+								})
+end
+
+
+
+local function get_connected_ids (self, pos, test_coords, list)
+	local con = self.connector_list[minetest.pos_to_string (pos, 0)]
+
+	if con and not con.checked then
+		con.checked = true
+
+		if con.id then
+			list[#list + 1] =
+			{
+				pos = { x = pos.x, y = pos.y, z = pos.z },
+				id = con.id
+			}
+		end
+
+		for i = 1, #test_coords do
+			get_connected_ids (self,
+									 {
+										  x = pos.x + test_coords[i].x,
+										  y = pos.y + test_coords[i].y,
+										  z = pos.z + test_coords[i].z
+									  },
+									  test_coords,
+									  list)
+		end
+
+		con.checked = false
+	end
+
+	return list
+end
+
+
+
+function connections:get_connected_ids (pos)
+	local list = get_connected_ids (self,
+											  pos,
+											  {
+												  { x =  1, y =  0, z =  0 },
+												  { x = -1, y =  0, z =  0 },
+												  { x =  0, y =  0, z =  1 },
+												  { x =  0, y =  0, z = -1 },
+												  { x =  0, y =  1, z =  0 },
+												  { x =  0, y = -1, z =  0 }
+											  },
+											  { })
+
+	for i = #list, 1, -1 do
+		for j = 1, i - 1, 1 do
+			if list[i].pos.x == list[j].pos.x and
+				list[i].pos.y == list[j].pos.y and
+				list[i].pos.z == list[j].pos.z then
+
+				list[i] = nil
+				break
+			end
+		end
+	end
+
+	return list
+end
+
+
+
+function connections:get_connected_ids_horizontal (pos)
+	return get_connected_ids (self,
+									  pos,
+									  {
+										  { x =  1, y =  0, z =  0 },
+										  { x = -1, y =  0, z =  0 },
+										  { x =  0, y =  0, z =  1 },
+										  { x =  0, y =  0, z = -1 }
+									  },
+									  { })
+end
+
+
+
+function connections:get_connected_ids_vertical (pos)
+	return get_connected_ids (self,
+									  pos,
+									  {
+										  { x =  0, y =  1, z =  0 },
+										  { x =  0, y = -1, z =  0 }
+									  },
+									  { })
+end
+
+
+
+function connections:get_connected_ids_north_south (pos)
+	return get_connected_ids (self,
+									  pos,
+									  {
+										  { x =  0, y =  0, z =  1 },
+										  { x =  0, y =  0, z = -1 }
+									  },
+									  { })
+end
+
+
+
+function connections:get_connected_ids_east_west (pos)
+	return get_connected_ids (self,
+									  pos,
+									  {
+										  { x =  1, y =  0, z =  0 },
+										  { x = -1, y =  0, z =  0 }
+									  },
+									  { })
+end
+
+
+
+return connections
+
+
+
+--

crafting.lua

@@ -3,6 +3,70 @@ local S = utils.S
 
 
 
+minetest.register_craft( {
+	output = "lwcomponents:cannon",
+	recipe = {
+		{ "default:steel_ingot", "default:steel_ingot", "default:steel_ingot" },
+		{ "default:chest", "default:wood", "" },
+		{ "default:copper_ingot", "default:stone", "" },
+	},
+})
+
+
+minetest.register_craft( {
+	output = "lwcomponents:cannon_locked",
+	recipe = {
+		{ "default:steel_ingot", "default:steel_ingot", "default:steel_ingot" },
+		{ "default:chest_locked", "default:wood", "" },
+		{ "default:copper_ingot", "default:stone", "" },
+	},
+})
+
+
+minetest.register_craft( {
+	output = "lwcomponents:cannon_shell 10",
+	recipe = {
+		{ "default:steel_ingot", "default:steel_ingot" },
+		{ "", "default:coalblock" },
+	},
+})
+
+
+minetest.register_craft( {
+	output = "lwcomponents:cannon_soft_shell 10",
+	recipe = {
+		{ "default:steel_ingot", "default:steel_ingot" },
+		{ "default:copper_lump", "default:coalblock" },
+	},
+})
+
+
+if minetest.global_exists ("fire") then
+minetest.register_craft( {
+	output = "lwcomponents:cannon_fire_shell 10",
+	recipe = {
+		{ "default:steel_ingot", "default:steel_ingot" },
+		{ "default:iron_lump", "default:coalblock" },
+	},
+})
+end -- minetest.global_exists ("fire")
+
+
+
+if utils.mesecon_supported then
+
+minetest.register_craft( {
+	output = "lwcomponents:through_wire_off 2",
+	recipe = {
+		{ "", "mesecons:wire_00000000_off" },
+		{ "mesecons:wire_00000000_off", "" },
+	},
+})
+
+end -- utils.mesecon_supported
+
+
+
 if utils.digilines_supported or utils.mesecon_supported then
 
 minetest.register_craft( {
@@ -94,6 +158,100 @@ minetest.register_craft( {
 	},
 })
 
+
+minetest.register_craft( {
+	output = "lwcomponents:breaker",
+	recipe = {
+		{ "default:chest", "default:pick_stone" },
+		{ "default:copper_ingot", "default:steel_ingot" },
+	},
+})
+
+
+minetest.register_craft( {
+	output = "lwcomponents:breaker_locked",
+	recipe = {
+		{ "default:chest_locked", "default:pick_stone" },
+		{ "default:copper_ingot", "default:steel_ingot" },
+	},
+})
+
+
+minetest.register_craft( {
+	output = "lwcomponents:deployer",
+	recipe = {
+		{ "default:chest", "group:wood" },
+		{ "default:copper_ingot", "default:steel_ingot" },
+	},
+})
+
+
+minetest.register_craft( {
+	output = "lwcomponents:deployer_locked",
+	recipe = {
+		{ "default:chest_locked", "group:wood" },
+		{ "default:copper_ingot", "default:steel_ingot" },
+	},
+})
+
+
+minetest.register_craft( {
+	output = "lwcomponents:fan",
+	recipe = {
+		{ "default:chest", "default:steel_ingot" },
+		{ "default:copper_ingot", "default:steel_ingot" },
+	},
+})
+
+
+minetest.register_craft( {
+	output = "lwcomponents:fan_locked",
+	recipe = {
+		{ "default:chest_locked", "default:steel_ingot" },
+		{ "default:copper_ingot", "default:steel_ingot" },
+	},
+})
+
+
+minetest.register_craft( {
+	output = "lwcomponents:conduit 5",
+	recipe = {
+		{ "default:stone", "", "default:stone" },
+		{ "", "default:chest", "" },
+		{ "default:stone", "default:steel_ingot", "default:stone" },
+	},
+})
+
+
+minetest.register_craft( {
+	output = "lwcomponents:conduit_locked 5",
+	recipe = {
+		{ "default:stone", "", "default:stone" },
+		{ "", "default:chest_locked", "" },
+		{ "default:stone", "default:steel_ingot", "default:stone" },
+	},
+})
+
+
+minetest.register_craft({
+	output = "lwcomponents:piston 2",
+	recipe = {
+		{ "group:wood", "group:wood", "group:wood" },
+		{ "default:cobble", "default:steel_ingot", "default:cobble" },
+		{ "default:stone", "default:copper_ingot", "default:stone" },
+	}
+})
+
+
+minetest.register_craft({
+	output = "lwcomponents:piston_sticky",
+	recipe = {
+		{"group:sapling"},
+		{"lwcomponents:piston"},
+	}
+})
+
+
 end -- utils.digilines_supported or utils.mesecon_supported
 
 
@@ -117,6 +275,44 @@ minetest.register_craft( {
 	},
 })
 
+
+minetest.register_craft( {
+	output = "lwcomponents:hologram",
+	recipe = {
+		{ "dye:red", "dye:green", "dye:blue" },
+		{ "default:copper_ingot", "default:steel_ingot", "default:copper_ingot" },
+		{ "default:chest", "default:stone", "default:glass" },
+	},
+})
+
+
+minetest.register_craft( {
+	output = "lwcomponents:hologram_locked",
+	recipe = {
+		{ "dye:red", "dye:green", "dye:blue" },
+		{ "default:copper_ingot", "default:steel_ingot", "default:copper_ingot" },
+		{ "default:chest_locked", "default:stone", "default:glass" },
+	},
+})
+
+
+minetest.register_craft( {
+	output = "lwcomponents:camera",
+	recipe = {
+		{ "default:copper_ingot", "default:iron_lump" },
+		{ "default:chest", "default:stone" },
+	},
+})
+
+
+minetest.register_craft( {
+	output = "lwcomponents:camera_locked",
+	recipe = {
+		{ "default:copper_ingot", "default:iron_lump" },
+		{ "default:chest_locked", "default:stone" },
+	},
+})
+
 end -- utils.digilines_supported
 
 

depends.txt

@@ -1,9 +1,7 @@
 default
-lwdrops?
 mesecons?
 digilines?
 unifieddyes?
 intllib?
 hopper?
-mobs?
 digistuff?

deployer.lua

@@ -0,0 +1,681 @@
+local utils = ...
+local S = utils.S
+
+
+
+if utils.digilines_supported or utils.mesecon_supported then
+
+
+
+local deploy_interval = 1.0
+
+
+
+local function send_deploy_message (pos, slot, name, range)
+	if utils.digilines_supported then
+		local meta = minetest.get_meta (pos)
+
+		if meta then
+			local channel = meta:get_string ("channel")
+
+			if channel:len () > 0 then
+				utils.digilines_receptor_send (pos,
+														 utils.digilines_default_rules,
+														 channel,
+														 { action = "deploy",
+															name = name,
+															slot = slot,
+															range = range })
+			end
+		end
+	end
+end
+
+
+
+local function deployer_front (pos, param2)
+	if param2 == 0 then
+		return { x = pos.x, y = pos.y, z = pos.z - 1 }
+	elseif param2 == 1 then
+		return { x = pos.x - 1, y = pos.y, z = pos.z }
+	elseif param2 == 2 then
+		return { x = pos.x, y = pos.y, z = pos.z + 1 }
+	elseif param2 == 3 then
+		return { x = pos.x + 1, y = pos.y, z = pos.z }
+	else
+		return { x = pos.x, y = pos.y, z = pos.z }
+	end
+end
+
+
+
+local function get_deploy_pos (pos, param2, range)
+	local deploypos = { x = pos.x, y = pos.y, z = pos.z }
+
+	for i = 1, range do
+		deploypos = deployer_front (deploypos, param2)
+
+		if i < range then
+			local node = minetest.get_node_or_nil (deploypos)
+
+			if not node or node.name ~= "air" then
+				local nodedef = utils.find_item_def (node.name)
+
+				if not nodedef or not nodedef.buildable_to then
+					return nil
+				end
+			end
+		end
+	end
+
+	return deploypos
+end
+
+
+
+local function place_node (item, pos)
+	local node = minetest.get_node_or_nil ({ x = pos.x, y = pos.y - 1, z = pos.z })
+
+	if not node then
+		return false
+	end
+
+	local nodedef = utils.find_item_def (node.name)
+
+	if node.name == "air" or not nodedef or (nodedef and nodedef.buildable_to) then
+		return false
+	end
+
+	node = minetest.get_node_or_nil (pos)
+
+	if not node then
+		return false
+	end
+
+	nodedef = utils.find_item_def (node.name)
+
+	if node.name ~= "air" then
+		if not nodedef or not nodedef.buildable_to or minetest.is_protected (pos, "") then
+			return false
+		end
+	end
+
+	local stack = ItemStack (item)
+	local itemdef = utils.find_item_def (stack:get_name ())
+
+	if stack and itemdef then
+		local placed = false
+		local pointed_thing =
+		{
+			type = "node",
+			under = { x = pos.x, y = pos.y - 1, z = pos.z },
+			above = pos,
+		}
+
+		if node.name ~= "air" and nodedef and nodedef.buildable_to then
+			pointed_thing =
+			{
+				type = "node",
+				under = pos,
+				above = { x = pos.x, y = pos.y + 1, z = pos.z },
+			}
+		end
+
+		if itemdef and itemdef.on_place then
+			local result, leftover = pcall (itemdef.on_place, stack, nil, pointed_thing)
+
+			placed = result
+
+			if not placed then
+				if utils.settings.alert_handler_errors then
+					minetest.log ("error", "on_place handler for "..stack:get_name ().." crashed - "..leftover)
+				end
+			end
+		end
+
+		if not placed then
+			if not minetest.registered_nodes[stack:get_name ()] then
+				return false
+			end
+
+			minetest.set_node (pos, { name = stack:get_name (), param1 = 0, param2 = 0 })
+
+			if itemdef and itemdef.after_place_node then
+				local result, msg = pcall (itemdef.after_place_node, pos, nil, stack, pointed_thing)
+
+				if not result then
+					if utils.settings.alert_handler_errors then
+						minetest.log ("error", "after_place_node handler for "..nodename.." crashed - "..msg)
+					end
+				end
+			end
+
+			if itemdef and  itemdef.sounds and itemdef.sounds.place then
+				pcall (minetest.sound_play, itemdef.sounds.place, { pos = pos })
+			end
+		end
+
+		return true
+	end
+
+	return false
+end
+
+
+
+-- slot:
+--    nil - next item, no drop if empty
+--    number - 1 item from slot, no drop if empty
+--    string - name of item to drop, no drop if none
+-- range:
+-- 	1 - 5 from front of deployer
+local function deploy_item (pos, node, slot, range)
+	local meta = minetest.get_meta (pos)
+
+	range = math.min (math.max (tonumber (range) or 1, 1), 5)
+
+	if meta then
+		local inv = meta:get_inventory ()
+
+		if inv then
+			if not slot then
+				local slots = inv:get_size ("main")
+
+				for i = 1, slots do
+					local stack = inv:get_stack ("main", i)
+
+					if not stack:is_empty () and stack:get_count () > 0 then
+						slot = i
+						break
+					end
+				end
+
+			elseif type (slot) == "string" then
+				local name = slot
+				slot = nil
+
+				local slots = inv:get_size ("main")
+
+				for i = 1, slots do
+					local stack = inv:get_stack ("main", i)
+
+					if not stack:is_empty () and stack:get_count () > 0 then
+						if name == stack:get_name () then
+							slot = i
+							break
+						end
+					end
+				end
+
+			else
+				slot = tonumber (slot)
+
+			end
+
+			if slot then
+				local stack = inv:get_stack ("main", slot)
+
+				if not stack:is_empty () and stack:get_count () > 0 then
+					local name = stack:get_name ()
+					local item = ItemStack (stack)
+					local deploypos = get_deploy_pos (pos, node.param2, range)
+
+					if item and deploypos then
+						if place_node (stack, deploypos) then
+							stack:set_count (stack:get_count () - 1)
+							inv:set_stack ("main", slot, stack)
+
+							send_deploy_message (pos, slot, name, range)
+
+							return true, slot, name, range
+						end
+					end
+				end
+			end
+		end
+	end
+
+	return false
+end
+
+
+
+local function deployer_off (pos)
+	local node = minetest.get_node (pos)
+
+	if node then
+		if node.name == "lwcomponents:deployer_on" then
+			node.name = "lwcomponents:deployer"
+
+			minetest.get_node_timer (pos):stop ()
+			minetest.swap_node (pos, node)
+
+		elseif node.name == "lwcomponents:deployer_locked_on" then
+			node.name = "lwcomponents:deployer_locked"
+
+			minetest.get_node_timer (pos):stop ()
+			minetest.swap_node (pos, node)
+
+		end
+	end
+end
+
+
+
+local function deployer_on (pos, node, slot, range)
+	local node = minetest.get_node (pos)
+
+	range = tonumber (range) or 1
+
+	if slot and tostring (slot) == "nil" then
+		slot = nil
+	end
+
+	if node and range < 6 and range > 0 then
+		if node.name == "lwcomponents:deployer" then
+			node.name = "lwcomponents:deployer_on"
+
+			minetest.swap_node (pos, node)
+			deploy_item (pos, node, slot, range)
+			minetest.get_node_timer (pos):start (deploy_interval)
+
+		elseif node.name == "lwcomponents:deployer_locked" then
+			node.name = "lwcomponents:deployer_locked_on"
+
+			minetest.swap_node (pos, node)
+			deploy_item (pos, node, slot, range)
+			minetest.get_node_timer (pos):start (deploy_interval)
+
+		end
+	end
+end
+
+
+
+local function after_place_node (pos, placer, itemstack, pointed_thing)
+	local meta = minetest.get_meta (pos)
+	local spec =
+	"formspec_version[3]\n"..
+	"size[11.75,13.75;true]\n"..
+	"field[1.0,1.0;4.0,0.8;channel;Channel;${channel}]\n"..
+	"button[5.5,1.0;2.0,0.8;setchannel;Set]\n"..
+	"list[context;main;3.5,2.5;4,4;]\n"..
+	"list[current_player;main;1.0,8.0;8,4;]\n"..
+	"listring[]"
+
+	meta:set_string ("inventory", "{ main = { } }")
+	meta:set_string ("formspec", spec)
+
+	local inv = meta:get_inventory ()
+
+	inv:set_size ("main", 16)
+	inv:set_width ("main", 4)
+
+	-- If return true no item is taken from itemstack
+	return false
+end
+
+
+
+local function after_place_node_locked (pos, placer, itemstack, pointed_thing)
+	after_place_node (pos, placer, itemstack, pointed_thing)
+
+	if placer and placer:is_player () then
+		local meta = minetest.get_meta (pos)
+
+		meta:set_string ("owner", placer:get_player_name ())
+		meta:set_string ("infotext", "Deployer (owned by "..placer:get_player_name ()..")")
+	end
+
+	-- If return true no item is taken from itemstack
+	return false
+end
+
+
+
+local function on_receive_fields (pos, formname, fields, sender)
+	if not utils.can_interact_with_node (pos, sender) then
+		return
+	end
+
+	if fields.setchannel then
+		local meta = minetest.get_meta (pos)
+
+		if meta then
+			meta:set_string ("channel", fields.channel)
+		end
+	end
+end
+
+
+
+local function can_dig (pos, player)
+	if not utils.can_interact_with_node (pos, player) then
+		return false
+	end
+
+	local meta = minetest.get_meta (pos)
+
+	if meta then
+		local inv = meta:get_inventory ()
+
+		if inv then
+			if not inv:is_empty ("main") then
+				return false
+			end
+		end
+	end
+
+	return true
+end
+
+
+
+local function on_blast (pos, intensity)
+	local meta = minetest.get_meta (pos)
+
+	if meta then
+		if intensity >= 1.0 then
+			local inv = meta:get_inventory ()
+
+			if inv then
+				local slots = inv:get_size ("main")
+
+				for slot = 1, slots do
+					local stack = inv:get_stack ("main", slot)
+
+					if stack and not stack:is_empty () then
+						if math.floor (math.random (0, 5)) == 3 then
+							utils.item_drop (stack, nil, pos)
+						else
+							utils.on_destroy (stack)
+						end
+					end
+				end
+			end
+
+			minetest.remove_node (pos)
+
+		else -- intensity < 1.0
+			local inv = meta:get_inventory ()
+
+			if inv then
+				local slots = inv:get_size ("main")
+
+				for slot = 1, slots do
+					local stack = inv:get_stack ("main", slot)
+
+					if stack and not stack:is_empty () then
+						utils.item_drop (stack, nil, pos)
+					end
+				end
+			end
+
+			local node = minetest.get_node_or_nil (pos)
+			if node then
+				local items = minetest.get_node_drops (node, nil)
+
+				if items and #items > 0 then
+					local stack = ItemStack (items[1])
+
+					if stack then
+						preserve_metadata (pos, node, meta, { stack })
+						utils.item_drop (stack, nil, pos)
+						minetest.remove_node (pos)
+					end
+				end
+			end
+		end
+	end
+end
+
+
+
+local function on_rightclick (pos, node, clicker, itemstack, pointed_thing)
+	if not utils.can_interact_with_node (pos, clicker) then
+		if clicker and clicker:is_player () then
+			local owner = "<unknown>"
+			local meta = minetest.get_meta (pos)
+
+			if meta then
+				owner = meta:get_string ("owner")
+			end
+
+			local spec =
+			"formspec_version[3]"..
+			"size[8.0,4.0,false]"..
+			"label[1.0,1.0;Owned by "..minetest.formspec_escape (owner).."]"..
+			"button_exit[3.0,2.0;2.0,1.0;close;Close]"
+
+			minetest.show_formspec (clicker:get_player_name (),
+											"lwcomponents:component_privately_owned",
+											spec)
+		end
+	end
+
+	return itemstack
+end
+
+
+
+local function on_timer (pos, elapsed)
+	deployer_off (pos)
+end
+
+
+
+local function digilines_support ()
+	if utils.digilines_supported then
+		return
+		{
+			wire =
+			{
+				rules = utils.digilines_default_rules,
+			},
+
+			effector =
+			{
+				action = function (pos, node, channel, msg)
+					local meta = minetest.get_meta(pos)
+
+					if meta then
+						local this_channel = meta:get_string ("channel")
+
+						if this_channel ~= "" and this_channel == channel and
+							type (msg) == "string" then
+
+							local m = { }
+							for w in string.gmatch(msg, "[^%s]+") do
+								m[#m + 1] = w
+							end
+
+							if m[1] == "deploy" then
+								if tostring (m[2]) == nil then
+									m[2] = "nil"
+								elseif m[2] and tonumber (m[2]) then
+									m[2] = tonumber (m[2])
+								end
+
+								deployer_on (pos, node, m[2], m[3])
+							end
+						end
+					end
+				end,
+			}
+		}
+	end
+
+	return nil
+end
+
+
+
+local function mesecon_support ()
+	if utils.mesecon_supported then
+		return
+		{
+			effector =
+			{
+				rules = utils.mesecon_flat_rules,
+
+				action_on = function (pos, node)
+					deployer_on (pos, node, "nil", 1)
+				end
+			}
+		}
+	end
+
+	return nil
+end
+
+
+
+minetest.register_node("lwcomponents:deployer", {
+	description = S("Deployer"),
+	tiles = { "lwdeployer.png", "lwdeployer.png", "lwdeployer.png",
+				 "lwdeployer.png", "lwdeployer.png", "lwdeployer_face.png"},
+	is_ground_content = false,
+	groups = { cracky = 3 },
+	sounds = default.node_sound_stone_defaults (),
+	paramtype = "none",
+	param1 = 0,
+	paramtype2 = "facedir",
+	param2 = 1,
+	floodable = false,
+	_digistuff_channelcopier_fieldname = "channel",
+
+	mesecons = mesecon_support (),
+	digiline = digilines_support (),
+
+	on_receive_fields = on_receive_fields,
+	after_place_node = after_place_node,
+	can_dig = can_dig,
+	on_blast = on_blast,
+	on_timer = on_timer,
+	on_rightclick = on_rightclick
+})
+
+
+
+minetest.register_node("lwcomponents:deployer_locked", {
+	description = S("Deployer (locked)"),
+	tiles = { "lwdeployer.png", "lwdeployer.png", "lwdeployer.png",
+				 "lwdeployer.png", "lwdeployer.png", "lwdeployer_face.png"},
+	is_ground_content = false,
+	groups = { cracky = 3 },
+	sounds = default.node_sound_stone_defaults (),
+	paramtype = "none",
+	param1 = 0,
+	paramtype2 = "facedir",
+	param2 = 1,
+	floodable = false,
+	_digistuff_channelcopier_fieldname = "channel",
+
+	mesecons = mesecon_support (),
+	digiline = digilines_support (),
+
+	on_receive_fields = on_receive_fields,
+	after_place_node = after_place_node_locked,
+	can_dig = can_dig,
+	on_blast = on_blast,
+	on_timer = on_timer,
+	on_rightclick = on_rightclick
+})
+
+
+
+
+minetest.register_node("lwcomponents:deployer_on", {
+	description = S("Deployer"),
+	tiles = { "lwdeployer.png", "lwdeployer.png", "lwdeployer.png",
+				 "lwdeployer.png", "lwdeployer.png", "lwdeployer_face_on.png"},
+	is_ground_content = false,
+	groups = { cracky = 3, not_in_creative_inventory = 1 },
+	sounds = default.node_sound_stone_defaults (),
+	paramtype = "none",
+	param1 = 0,
+	paramtype2 = "facedir",
+	param2 = 1,
+	light_source = 3,
+	floodable = false,
+	drop = "lwcomponents:deployer",
+	_digistuff_channelcopier_fieldname = "channel",
+
+	mesecons = mesecon_support (),
+	digiline = digilines_support (),
+
+	on_receive_fields = on_receive_fields,
+	can_dig = can_dig,
+	after_place_node = after_place_node,
+	on_blast = on_blast,
+	on_timer = on_timer,
+	on_rightclick = on_rightclick
+})
+
+
+
+minetest.register_node("lwcomponents:deployer_locked_on", {
+	description = S("Deployer (locked)"),
+	tiles = { "lwdeployer.png", "lwdeployer.png", "lwdeployer.png",
+				 "lwdeployer.png", "lwdeployer.png", "lwdeployer_face_on.png"},
+	is_ground_content = false,
+	groups = { cracky = 3, not_in_creative_inventory = 1 },
+	sounds = default.node_sound_stone_defaults (),
+	paramtype = "none",
+	param1 = 0,
+	paramtype2 = "facedir",
+	param2 = 1,
+	light_source = 3,
+	floodable = false,
+	drop = "lwcomponents:deployer_locked",
+	_digistuff_channelcopier_fieldname = "channel",
+
+	mesecons = mesecon_support (),
+	digiline = digilines_support (),
+
+	on_receive_fields = on_receive_fields,
+	can_dig = can_dig,
+	after_place_node = after_place_node_locked,
+	on_blast = on_blast,
+	on_timer = on_timer,
+	on_rightclick = on_rightclick
+})
+
+
+
+utils.hopper_add_container({
+	{"top", "lwcomponents:deployer", "main"}, -- take items from above into hopper below
+	{"bottom", "lwcomponents:deployer", "main"}, -- insert items below from hopper above
+	{"side", "lwcomponents:deployer", "main"}, -- insert items from hopper at side
+})
+
+
+
+utils.hopper_add_container({
+	{"top", "lwcomponents:deployer_locked", "main"}, -- take items from above into hopper below
+	{"bottom", "lwcomponents:deployer_locked", "main"}, -- insert items below from hopper above
+	{"side", "lwcomponents:deployer_locked", "main"}, -- insert items from hopper at side
+})
+
+
+
+utils.hopper_add_container({
+	{"top", "lwcomponents:deployer_on", "main"}, -- take items from above into hopper below
+	{"bottom", "lwcomponents:deployer_on", "main"}, -- insert items below from hopper above
+	{"side", "lwcomponents:deployer_on", "main"}, -- insert items from hopper at side
+})
+
+
+
+utils.hopper_add_container({
+	{"top", "lwcomponents:deployer_locked_on", "main"}, -- take items from above into hopper below
+	{"bottom", "lwcomponents:deployer_locked_on", "main"}, -- insert items below from hopper above
+	{"side", "lwcomponents:deployer_locked_on", "main"}, -- insert items from hopper at side
+})
+
+
+end -- utils.digilines_supported or utils.mesecon_supported
+
+
+
+--

detector.lua

@@ -60,7 +60,7 @@ end
 
 
 
-local function send_detect_message (pos, item_type, name, label, item_pos, count, hp, height)
+local function send_detect_message (pos, detected_list)
 	if utils.digilines_supported then
 		local meta = minetest.get_meta (pos)
 
@@ -72,13 +72,7 @@ local function send_detect_message (pos, item_type, name, label, item_pos, count
 														 utils.digilines_default_rules,
 														 channel,
 														 { action = "detect",
-															type = item_type,
-															name = name,
-															label = label,
-															pos = to_relative_coords (pos, item_pos),
-															count = count,
-															hp = hp,
-															height = height })
+															detected = detected_list })
 			end
 		end
 	end
@@ -169,22 +163,25 @@ local function detect (pos)
 		local radius = meta:get_int ("radius")
 		local mode = meta:get_int ("mode")
 		local object = minetest.get_objects_inside_radius (pos, radius + 0.5)
+		local detected_list = { }
 
-		for i = 1, #object do
+		for i = 1, #object, 1 do
 			if object[i]:is_player () then
 
 				-- player
 				if meta:get_string ("players") == "true" and
 					filter_item (pos, mode, object[i]:get_pos ()) then
 
-					send_detect_message (pos,
-												"player",
-												object[i]:get_player_name (),
-												object[i]:get_player_name (),
-												object[i]:get_pos (),
-												1,
-												object[i]:get_hp (),
-												get_entity_height (object[i]))
+					detected_list[#detected_list + 1] =
+					{
+						type = "player",
+						name = object[i]:get_player_name (),
+						label = object[i]:get_player_name (),
+						pos = to_relative_coords (pos, object[i]:get_pos ()),
+						count = 1,
+						hp = object[i]:get_hp (),
+						height = get_entity_height (object[i])
+					}
 
 					detected = true
 				end
@@ -200,14 +197,17 @@ local function detect (pos)
 					local stack = ItemStack (object[i]:get_luaentity ().itemstring or "")
 
 					if stack and not stack:is_empty () then
-						send_detect_message (pos,
-													"drop",
-													stack:get_name (),
-													stack:get_name (),
-													object[i]:get_pos (),
-													stack:get_count (),
-													0,
-													0)
+
+						detected_list[#detected_list + 1] =
+						{
+							type = "drop",
+							name = stack:get_name (),
+							label = stack:get_name (),
+							pos = to_relative_coords (pos, object[i]:get_pos ()),
+							count = stack:get_count (),
+							hp = 0,
+							height = 0
+						}
 
 						detected = true
 					end
@@ -231,14 +231,16 @@ local function detect (pos)
 							  object[i]:get_luaentity () and
 							  object[i]:get_luaentity ().name) or ""
 
-					send_detect_message (pos,
-												"entity",
-												name,
-												label,
-												object[i]:get_pos (),
-												1,
-												object[i]:get_hp (),
-												get_entity_height (object[i]))
+					detected_list[#detected_list + 1] =
+					{
+						type = "entity",
+						name = name,
+						label = label,
+						pos = to_relative_coords (pos, object[i]:get_pos ()),
+						count = 1,
+						hp = object[i]:get_hp (),
+						height = get_entity_height (object[i])
+					}
 
 					detected = true
 
@@ -258,14 +260,16 @@ local function detect (pos)
 						if node and node.name ~= "air" and node.name ~= "ignore" and
 							filter_item (pos, mode, testpos) then
 
-							send_detect_message (pos,
-														"node",
-														node.name,
-														node.name,
-														testpos,
-														1,
-														0,
-														0)
+							detected_list[#detected_list + 1] =
+							{
+								type = "node",
+								name = node.name,
+								label = node.name,
+								pos = testpos,
+								count = 1,
+								hp = 0,
+								height = 0
+							}
 
 							detected = true
 						end
@@ -276,6 +280,8 @@ local function detect (pos)
 
 		if detected then
 			mesecons_on (pos)
+
+			send_detect_message (pos, detected_list)
 		else
 			mesecons_off (pos)
 		end
@@ -613,7 +619,9 @@ local function digilines_support ()
 					if meta then
 						local this_channel = meta:get_string ("channel")
 
-						if this_channel ~= "" and this_channel == channel then
+						if this_channel ~= "" and this_channel == channel and
+							type (msg) == "string" then
+
 							local m = { }
 							for w in string.gmatch(msg, "[^%s]+") do
 								m[#m + 1] = w

dispenser.lua

@@ -7,6 +7,26 @@ if utils.digilines_supported or utils.mesecon_supported then
 
 
 
+local dispenser_force = 25
+
+
+
+local function dispense_dir (node)
+	if node.param2 == 0 then
+		return { x = 0, y = 0, z = -1 }
+	elseif node.param2 == 1 then
+		return { x = -1, y = 0, z = 0 }
+	elseif node.param2 == 2 then
+		return { x = 0, y = 0, z = 1 }
+	elseif node.param2 == 3 then
+		return { x = 1, y = 0, z = 0 }
+	else
+		return { x = 0, y = 0, z = 0 }
+	end
+end
+
+
+
 local function dispense_pos (pos, node)
 	if node.param2 == 0 then
 		return { x = pos.x, y = pos.y, z = pos.z - 1 }
@@ -24,18 +44,17 @@ end
 
 
 local function dispense_velocity (node)
-	local force = 25 --math.random (30 , 35)
 	local tilt = (math.random (1 , 2001) - 1001) / 1000
 	local sway = (math.random (1 , 4001) - 2001) / 1000
 
 	if node.param2 == 0 then
-		return { x = sway, y = tilt, z = -force }
+		return { x = sway, y = tilt, z = -dispenser_force }
 	elseif node.param2 == 1 then
-		return { x = -force, y = tilt, z = sway }
+		return { x = -dispenser_force, y = tilt, z = sway }
 	elseif node.param2 == 2 then
-		return { x = sway, y = tilt, z = force }
+		return { x = sway, y = tilt, z = dispenser_force }
 	elseif node.param2 == 3 then
-		return { x = force, y = tilt, z = sway }
+		return { x = dispenser_force, y = tilt, z = sway }
 	else
 		return { x = 0, y = 0, z = 0 }
 	end
@@ -64,90 +83,6 @@ end
 
 
 
-local function try_spawn (pos, node, item)
-	if utils.mobs_supported then
-		local mob = item:get_name ()
-		local item_def = minetest.registered_craftitems[mob]
-		local spawn_pos = dispense_pos (pos, node)
-
-		if item_def and item_def.groups and item_def.groups.spawn_egg then
-			if mob:sub (mob:len () - 3) == "_set" then
-				mob = mob:sub (1, mob:len () - 4)
-
-				if minetest.registered_entities[mob] then
-					local data = item:get_metadata ()
-					local smob = minetest.add_entity (spawn_pos, mob, data)
-					local ent = smob and smob:get_luaentity ()
-
-					if ent then
-						local meta = minetest.get_meta (pos)
-
-						if meta then
-							local owner = meta:get_string ("owner")
-
-							-- set owner if not a monster
-							if owner:len () > 0 and ent.type ~= "monster" then
-								ent.owner = owner
-								ent.tamed = true
-							end
-						end
-					end
-
-					return smob
-				end
-
-			else
-				if minetest.registered_entities[mob] then
-					local smob = minetest.add_entity (spawn_pos, mob)
-					local ent = smob and smob:get_luaentity ()
-
-					if ent then
-						local meta = minetest.get_meta (pos)
-
-						if meta then
-							local owner = meta:get_string ("owner")
-
-							-- set owner if not a monster
-							if owner:len () > 0 and ent.type ~= "monster" then
-								ent.owner = owner
-								ent.tamed = true
-							end
-						end
-					end
-
-					return smob
-				end
-
-			end
-
-		elseif mob == "mobs:egg" then
-			if math.random (1, 10) == 1 then
-				local smob = minetest.add_entity (spawn_pos, "mobs_animal:chicken")
-				local ent = smob and smob:get_luaentity ()
-
-				if ent then
-					local meta = minetest.get_meta (pos)
-
-					if meta then
-						local owner = meta:get_string ("owner")
-
-						-- set owner if not a monster
-						if owner:len () > 0 and ent.type ~= "monster" then
-							ent.owner = owner
-							ent.tamed = true
-						end
-					end
-				end
-
-				return smob
-			end
-		end
-	end
-
-	return nil
-end
-
-
 -- slot:
 --    nil - next item, no dispense if empty
 --    number - 1 item from slot, no dispense if empty
@@ -202,16 +137,33 @@ local function dispense_item (pos, node, slot)
 
 					if item then
 						item:set_count (1)
+						local spawn_pos = dispense_pos (pos, node)
+						local owner = meta:get_string ("owner")
+						local obj, cancel = nil, false
 
-						local obj = try_spawn (pos, node, item)
+						if utils.settings.spawn_mobs then
+							obj, cancel = utils.spawn_registered (name,
+																			  spawn_pos,
+																			  item,
+																			  owner,
+																			  pos,
+																			  dispense_dir (node),
+																			  dispenser_force)
+
+							if obj == nil and cancel then
+								return false
+							end
+						end
 
 						if not obj then
-							obj = minetest.add_item (dispense_pos (pos, node), item)
-						end
+							obj = minetest.add_item (spawn_pos, item)
 
 							if obj then
 								obj:set_velocity (dispense_velocity (node))
+							end
+						end
 
+						if obj then
 							stack:set_count (stack:get_count () - 1)
 							inv:set_stack ("main", slot, stack)
 
@@ -413,7 +365,9 @@ local function digilines_support ()
 					if meta then
 						local this_channel = meta:get_string ("channel")
 
-						if this_channel ~= "" and this_channel == channel then
+						if this_channel ~= "" and this_channel == channel and
+							type (msg) == "string" then
+
 							local m = { }
 							for w in string.gmatch(msg, "[^%s]+") do
 								m[#m + 1] = w

docs/api.txt

@@ -0,0 +1,51 @@
+
+
+lwcomponents.version ()
+	Returns this mod version as a string. eg. "0.1.5".
+
+
+
+lwcomponents.register_spawner (itemname, spawn_func)
+
+	itemname:
+		Registered string name of the spawner item
+
+	spawn_func:
+		The function to call to spawn the mob of the form -
+
+		spawn_func (spawn_pos, itemstack, owner, spawner_pos, spawner_dir, force)
+
+		spawn_pos:
+			The position the entity should be spawned at.
+
+		itemstack:
+			The spawner ItemStack, of the name itemname.
+
+		owner:
+			As string of the player's name that will own the spawned entity,
+			if applicable. This may be "" for no owner.
+
+		spawner_pos:
+			The position of the block calling this function.
+
+		spawner_dir:
+			A single unit vector of the direction the spawner block is facing.
+			eg. { x = -1, y = 0, z = 0 }
+
+		force:
+			Recommended force (for velocity) of spawned entity.
+			Can use vector.multiply (spawner_dir, force).
+
+		This function should return the ObjectRef of the spawned entity or
+		nil. If this function returns nil for ObjectRef a second boolean
+		value should be returned for whether to cancel the action.
+
+		eg. If too many mobs:
+			return nil, true
+
+		eg. If only chance of spawn and out of luck:
+			return nil, false
+
+	The register function return true on success, or false on failure
+	(parameter type check failed or the spawn item has already been
+	registered).

docs/breaker.txt

@@ -0,0 +1,52 @@
+Breaker
+-------
+* This block is only available if digilines and/or mesecons are loaded.
+
+Breakers dig the node up to 5 nodes directly in front of them and drop
+the item at the back of them. The node is only dug if the breaker has a
+tool that can dig it or if it can be dug by hand, and there are no nodes
+before of it. ie. cannot dig 2nd node if 1st node has something in it.
+The tool is worn if used. Also acts as a digilines conductor. If the
+hopper mod is loaded, will take tools from the top and sides.
+
+Only the owner can dig or access the form of the locked version.
+
+UI
+
+Channel - digilines channel of breaker.
+Top 1 slot inventory - tool to use.
+Bottom 32 slot inventory - player's inventory.
+
+Mesecons
+	Digs the node in front (always the 1st node position) when power is
+	turned on, if it can.
+
+Digilines messages
+
+"break n"
+	Digs the node at n nodes in front when power is turned on, if it can.
+	n should be a number between 1 and 5. If omitted 1 is assumed.
+
+"eject side"
+	Drop the tool in the tool slot at the given side. Valid sides are "left",
+	"right", "back", "front". If side is omitted or invalid "front" is used.
+
+When a breaker digs a node or wears out the tool a digilines message is
+sent with the breaker's channel. The message is a table with the following
+keys:
+{
+	action = "<action>",
+	name = "<name>",
+	range = <number>
+}
+
+action
+	Will be "break" or "tool".
+
+name
+	For "break" action the registered node name of what was dug.
+	For "tool" action the registered tool name of the tool that wore out.
+
+range
+	For "break" action the nodes forward that was dug.
+	For "tool" action always nil.

docs/camera.txt

@@ -0,0 +1,41 @@
+Camera
+------
+* This block is only available if digilines is loaded.
+
+Cameras take an image in the direction they are facing. The colors in the
+image represent what is being viewed. Nodes are gray, entities are blue and
+players are green. The closer they are to the camera the brighter the color.
+The viewing distance of the camera is 1 to 16 nodes. Also acts as a
+digilines conductor.
+
+Only the owner can dig or access the form of the locked version.
+
+UI
+
+Channel - digilines channel of camera.
+Distance - the viewing distance forward from the camera (1 t0 16).
+Resolution - the image resolution (for both width and height).
+
+Digilines messages
+
+"scan"
+	Sends a digilines message with the camera's channel and a table of the
+	image as the message (see below).
+
+"distance n"
+	Sets the viewing distance of the camera. Will be clipped between 1 and
+	16.
+
+"resolution n"
+	Sets the image resolution of the camera.
+
+The image is an indexed table of indexed tables. Each inner table is one
+line of the image ordered top to bottom. There are resolution number of
+lines. Each line has a string value for each pixel of that line left to
+right. The string is a hex color string eg. "00FF00". There are resolution
+number of pixels per line.
+
+The image format is compatible with digistuff's digiscreens and lwcomputers'
+digiscreens and digipanels. It is best to set the resolution of the camera
+to the resolution of the display, then the image from the camera can be sent
+straight to the display device.

docs/cannon.txt

@@ -0,0 +1,103 @@
+Cannon
+------
+This item is available without digilines or mesecons as it can be used
+manually.
+
+Contains a single inventory slot and shoots an item on command.
+If the hopper mod is loaded, will take items from the top and sides, and
+release them from the bottom.
+
+Cannon rotation range:
+side to side - +/-60 degrees (- = left, + = right)
+down to up: -20 to 70 degrees (- = down, + = up)
+
+To spawn entities from cannons include the lwcomponents_spawners mod.
+
+Only the owner can dig or access the form of the locked version.
+
+UI
+
+Channel - digilines channel of cannon.
+Hide - hides the form so the cannon can be used manually, double right click
+		 any other face besides the rear to bring up the form.
+Controller - digistuff game controller digilines channel.
+Sensitive - if checked game controller movements have a x3 sensitivity.
+Top 1 slot inventory - storage of items to shoot.
+Bottom 32 slot inventory - player's inventory.
+
+Manual control
+Place some items in the single slot, and click the Hide button. On the
+rear panel their are 4 gray buttons. Right clicking them turns the barrel
+in that direction 10 degrees. aux + right click turns 1 degree. Clicking
+the red button fires an item. To bring up the form again double right click
+any other face besides the rear.
+
+Digistuff game controller
+Connect a game controller to the cannon with digilines cable. Enter the
+game controller's channel in the Controller field of the cannon's form
+(click Set). Your turning movements turn the cannon's barrel in the
+direction the cannon is facing. If Sensitive is checked the movements
+have an increased sensitivity (x3) to try and keep the target in your view,
+otherwise x1. Punching shoots an item. The game controller updates every
+0.2 seconds, so a quick punch may not register. A locked cannon can only
+be controlled by it's owner with a game controller.
+
+Mesecons
+	Shoots an item when power is turned on.
+
+Digilines messages
+
+"pitch <n>"
+	Sets the pitch of the barrel. n should be between -20 to 70, and will
+	be clipped to this range.
+	eg. "pitch 22"
+
+"rotation <n>"
+	Sets the rotation of the barrel. n should be between -60 to 60, and will
+	be clipped to this range.
+	eg. "rotation 45"
+
+table - aim position
+{
+	action = "aim",
+	aim = { x, y, z }
+}
+	x is the horizontal left (negative) to right. 0 is straight ahead.
+	y is the vertical down (negative) to up. 0 is straight ahead.
+	z is the depth. Must be > 0 or ignored. 1 is the position directly in
+	front of the cannon.
+	*	The cannon barrel's height is 0.65 above the cannon's placed position.
+		When aiming for height, if the cannon's base height is taken as -0.5,
+		and consider height from there. This allows for the barrel height
+		and a little drop in the projectile at close range.
+
+"fire"
+	Shoots an item.
+
+*	Note: turning the barrel is animated and takes 0.1 seconds per 10
+			degrees of movement. A fire command while moving is ignored.
+
+
+Three shells are provided for cannons.
+
+Shell
+This shell has a 70% chance of destroying a node within a radius of 2 from
+the impact, a 5% chance a flammable node will be set on fire within a
+radius of 2 (if fire is installed), and damages players and entities within
+a radius of 4 with a maximum of 20 damage points.
+
+
+Soft Shell
+This shell has a 50% chance of destroying only soft (buildable_to) nodes,
+such as grass, within a radius of 2 from the impact, a 5% chance a flammable
+node will be set on fire within a radius of 2 (if fire is installed), and
+damages players and entities within a radius of 4 with a maximum of 20
+damage points.
+
+
+Fire Shell
+* This item is only available if fire is installed.
+This shell does not destroying nodes, has a 70% chance of setting a node
+on fire, whether its flammable or not within a radius of 2, and damages
+players and entities within a radius of 4 with a maximum of 20 damage
+points.

docs/collector.txt

@@ -0,0 +1,33 @@
+Collector
+---------
+* This block is only available if digilines is loaded.
+
+Picks up dropped items in adjacent block, with optional filtering. Also
+acts as a digilines conductor. If the hopper mod is loaded, will take items
+from the top and sides, and release them from the bottom.
+
+Only the owner can dig or access the form of the locked version.
+
+UI
+
+Channel - digilines channel of collector.
+Left 16 slot inventory - storage of picked up items.
+Right 8 slot inventory - Filter list. Place what items should be picked
+	up in this list. Leave empty to pick up all.
+Bottom 32 slot inventory - player's inventory.
+
+Digilines messages
+
+"start"
+	Start the collector.
+
+"stop"
+	Stop the collector.
+
+When items are picked up a digilines message is sent with the collector's
+channel. The message is a table with the following keys:
+{
+	action = "collect",
+	name = "<itemname>", -- name of picked up items.
+	count = <count> -- number of the item picked up.
+}

docs/conduit.txt

@@ -0,0 +1,66 @@
+Conduit
+-------
+* This block is only available if digilines and/or mesecons are loaded.
+
+Conduits are connected in a circuit, and can move items from their
+inventory to another conduit in the same circuit.
+
+When a conduit node is placed it has a simple form that asks for a channel.
+This channel is both the digilines' channel and the target id of this
+conduit within the circuit. A conduit does not have to be given a name.
+Most of them are just used to connect other conduits together.
+
+Transfer of items takes 0.1 seconds per conduit node moved.
+
+Also acts as a digilines conductor. If the hopper mod is loaded, will
+take items from the top and sides, and release them from the bottom.
+
+Only the owner can dig or access the form of the locked version.
+
+UI
+
+Channel - digilines channel/target id of circuit.
+Target - target id/channel of circuit this circuit will transfer to.
+Automatic - if checked transfers next item every second without command.
+Top right 16 slot inventory - storage of items.
+Bottom 32 slot inventory - player's inventory.
+
+Mesecons
+	Transfers the next item when power is turned on to the target circuit.
+
+Digilines messages
+"target <id>"
+	Set the target of the conduit. id should be the channel of another
+	conduit on the same circiut. This takes a moment to take effect, so
+	delay any transfers.
+
+"targets"
+	Conduit will send a digilines message with its own channel in the form:
+	{
+		action = "targets",
+		targets = { ... } -- list of string channels of all other conduits
+								-- with a channel on the same circuit.
+	}
+
+"transfer"
+	Simple transfer. Transfers the next item in the inventory to the target
+	circuit (same as mesecons power).
+
+table message
+{
+	action = "transfer",
+	target = "<channel>",
+	slot = <number>,
+	item = "<itemname>"
+}
+
+	If target is not given, the circuit's set target is used.
+
+	slot should be a number between 1 to 16. If the slot is empty nothing
+	is transferred.
+
+	item should be the registered item name. If the circuit's inventory
+	does not contain any nothing is transferred.
+
+	Only slot or item should be given. If both are given slot is used. If
+	neither are given the next item in the inventory is transferred.

docs/deployer.txt

@@ -0,0 +1,57 @@
+Deployer
+-------
+* This block is only available if digilines and/or mesecons are loaded.
+
+Deployers place the node up to 5 nodes directly in front of them. The
+node is only placed if there are no nodes before of it which are not
+replaceable. ie. cannot place 2nd node if 1st node has something in it.
+Also acts as a digilines conductor. If the hopper mod is loaded, will
+take items from the top and sides, and release them from the bottom.
+
+Only the owner can dig or access the form of the locked version.
+
+UI
+
+Channel - digilines channel of breaker.
+Top 16 slot inventory - storage of items to place.
+Bottom 32 slot inventory - player's inventory.
+
+Mesecons
+	Places the node in front (always the 1st node position) when power is
+	turned on, if it can.
+
+Digilines messages
+
+"deploy  <slot or itemname> <n>"
+	Places the node at n nodes in front when power is turned on, if it can.
+	n should be a number between 1 and 5. If omitted 1 is assumed.
+
+	If slot is a number, places an item from that slot. No placement if
+	slot is empty.
+	eg. "deploy 7"
+
+	If itemname is given, places the item of the name given. No placement
+	if deployer does not contain the item.
+	eg. "deploy default:stone"
+
+	If n is given with no slot/itemname use "nil".
+	eg. "deploy nil 3"
+
+When a deployer places a node a digilines message is sent with the
+deployer's channel. The message is a table with the following
+keys:
+{
+	action = "deploy",
+	name = "<name>",
+	slot = <slot>,
+	range = <number>
+}
+
+action
+	Will be "deploy".
+
+name
+	The registered node name of what was placed.
+
+range
+	The nodes forward that was placed.

docs/detector.txt

@@ -0,0 +1,112 @@
+Detector
+--------
+* This block is only available if digilines and/or mesecons are loaded.
+
+Detects items or entities within a given radius. Also acts as a
+digilines conductor.
+
+Only the owner can dig or access the form of the locked version.
+
+UI
+
+Channel - digilines channel of detector.
+Radius - block distance from detector to detect.
+Entities - if checked detects entities.
+Players - if checked detects players.
+Drops - if checked detects drops.
+Nodes - if checked detects nodes.
+
+mode:
+	All - detects to radius in all directions, including diagonal.
+	Forward - detects to radius directly in front of the detector (one block high).
+	Up - detects to radius directly above the detector (one block wide).
+	Down - detects to radius directly below the detector (one block wide).
+
+Mesecons
+	Mesecons power is turned on when something is detected, and turned off
+	when nothing is detected.
+
+Digilines messages
+
+"start"
+	Start the detector.
+
+"stop"
+	Stop the detector.
+
+"radius <n>"
+	Set radius of the detector. <n> should be a number from 1 to 5, and is
+	trimmed to this range.
+
+"entities <true|false>"
+	Set detection of entities on or off.
+
+"players <true|false>"
+	Set detection of players on or off.
+
+"drops <true|false>"
+	Set detection of drops on or off.
+
+"nodes <true|false>"
+	Set detection of nodes on or off.
+
+"mode all"
+"mode forward"
+"mode up"
+"mode down"
+	Set the detector's mode.
+
+When items or entities are detected a digilines message is sent with the
+detector's channel. A message is sent for each found item/entity. The
+message is a table with the following keys:
+
+{
+	action = "detect",
+	detected = table
+}
+
+The detected field is a list of detected items. Each entry is of the form:
+{
+	type = "<type>", -- will be "entity", "player", "drop" or "node"
+	name = "<name>",
+	label = "<label>",
+	pos = { x = n, y = n, z = n },
+	count = <count>,
+	hp = <number>,
+	height = <number>
+}
+
+type
+	Will be "entity", "player", "drop" or "node".
+
+name
+	For "entity" the registered entity name.
+	For "player" the player's name.
+	For "drop" the registered item name.
+	For "node" the registered item name.
+
+label
+	For "entity" the name tag text.
+	For "player" the player's name.
+	For "drop" the registered item name.
+	For "node" the registered item name.
+
+pos
+	The relative position of the detected item/entity from the detector,
+	facing the direction of the detector.
+	+x = right
+	-x = left
+	+z = forward
+	-z = behind
+	+y = above
+	-y = below
+
+count
+	The count of items for a "drop", or 1 for everything else.
+
+hp
+	Health points for players and entities. Zero for everything else.
+
+height
+	Height for players and entities. Zero for everything else. This is simply
+	the top position of the object's collision box.

docs/digiswitch.txt

@@ -0,0 +1,21 @@
+DigiSwitch
+----------
+* This block is only available if both digilines and mesecons are loaded.
+
+Digiswitches act as both a digilines message target and a digilines cable,
+as well as a mesecons power source. They can be placed beside each other
+to form a bank, horizontally or vertically.
+
+Right click the digiswitch to give it a channel.
+
+Mesecon power can be delivered at 6 sides of the digiswitch, the adjacent
+4 in the (x, z), above and below. Around the connector on these sides are a
+colored border indicating the side. The sides are named "red", "green",
+"blue", "yellow", "white" and "black".
+
+The digilines message sent to the digiswitch dictates the action, "on" or
+"off". The action can be followed with the side to act upon, separated by
+a space. eg. "on white". If a side is stated only that side is acted upon.
+If the side is omitted (or is invalid) all 6 sides are acted upon. If the
+side name "switch" is give the power is supplied the same as a mesecons
+switch (all horizontal sides, one below, this height and one above).

docs/dispenser.txt

@@ -0,0 +1,43 @@
+Dispenser
+---------
+* This block is only available if digilines and/or mesecons are loaded.
+
+Contains an inventory and dispenses (with velocity) an item on command.
+Also acts as a digilines conductor. If the hopper mod is loaded, will take
+items from the top and sides, and release them from the bottom.
+
+To spawn entities from dispensers include the lwcomponents_spawners mod.
+
+Only the owner can dig or access the form of the locked version.
+
+UI
+
+Channel - digilines channel of dispenser.
+Top 16 slot inventory - storage of items to dispense.
+Bottom 32 slot inventory - player's inventory.
+
+Mesecons
+	Dispenses the next item when power is turned on.
+
+Digilines messages
+
+"dispense"
+	Dispenses the next item. No dispense if dispenser is empty.
+
+"dispense <slot>"
+	Dispenses 1 item from the given slot (1 to 16). No dispense if slot is
+	empty.
+	eg. "dispense 7"
+
+"dispense <itemname>"
+	Dispenses 1 item of the given name. No dispense if dispenser does not
+	contain the item.
+	eg. "dispense default:stone"
+
+When an item is dropped a digilines message is sent with the dropper's
+channel. The message is a table with the following keys:
+{
+	action = "dispense",
+	name = "<itemname>", -- name of dropped item
+	slot = <slot> -- slot number the item was taken from (1 to 16).
+}

docs/dropper.txt

@@ -0,0 +1,40 @@
+Dropper
+-------
+* This block is only available if digilines and/or mesecons are loaded.
+
+Contains an inventory and drops an item on command. Also acts as a
+digilines conductor. If the hopper mod is loaded, will take items from the
+top and sides, and release them from the bottom.
+
+Only the owner can dig or access the form of the locked version.
+
+UI
+
+Channel - digilines channel of dropper.
+Top 16 slot inventory - storage of items to drop.
+Bottom 32 slot inventory - player's inventory.
+
+Mesecons
+	Drops the next item when power is turned on.
+
+Digilines messages
+
+"drop"
+	Drops the next item. No drop if dropper is empty.
+
+"drop <slot>"
+	Drops 1 item from the given slot (1 to 16). No drop if slot is empty.
+	eg. "drop 7"
+
+"drop <itemname>"
+	Drops 1 item of the given name. No drop if dropper does not contain the
+	item.
+	eg. "drop default:stone"
+
+When an item is dropped a digilines message is sent with the dropper's
+channel. The message is a table with the following keys:
+{
+	action = "drop",
+	name = "<itemname>", -- name of dropped item
+	slot = <slot> -- slot number the item was taken from (1 to 16).
+}

docs/fan.txt

@@ -0,0 +1,24 @@
+Fan
+---
+* This block is only available if digilines and/or mesecons are loaded.
+
+Fans blow any entity, player or drop in front of the fan for 5 node
+spaces in the direction of the fan. A node placed in these 5 spaces blocks
+the fan's action beyond the placed node. Also acts as a digilines conductor.
+
+Only the owner can dig or access the form of the locked version.
+
+UI
+
+Channel - digilines channel of fan.
+
+Mesecons
+	Fan runs while power is turned on.
+
+Digilines messages
+
+"start"
+	Starts the fan.
+
+"stop"
+	Stops the fan.

docs/hologram.txt

@@ -0,0 +1,107 @@
+Hologram
+--------
+* This block is only available if digilines is loaded.
+
+Projects a hologram above the hologram node. Also acts as a digilines
+conductor.
+
+The hologram occupies a space 15x15x15. The lower level of the hologram
+is 2 blocks above the hologram node (so the hologram node can be hidden
+beneath a floor). The hologram node is in the x, z horizontal center, ie.
+the hologram can extend 7 blocks in each direction from the node.
+
+Colored blocks cannot be interacted with, but will be replaced if built
+into. If a block already exists where the hologram requires a color, it
+is not placed unless the block is a color block from this hologram block.
+If an existing block is dug while a holograms is displayed it is not
+filled in, the hologram has to be re-displayed.
+
+Only the owner can dig or access the form of the locked version.
+
+UI
+
+Channel - digilines channel of hologram.
+
+Digilines messages
+
+"clear"
+	Removes any hologram currently projected.
+
+table
+	To display a hologram a table of dimensions holo[15][15][15] is sent as
+	the message. The table structure is holo[layer][line][block]. In the
+	direction the hologram block is facing, the layers run from bottom to
+	top, the lines run from back to front, and the blocks run from right to
+	left. Each block value can be nil for no display, or a string with the
+	color. Valid colors are:
+		"black"
+		"gray"
+		"silver"
+		"white"
+		"sky"
+		"blue"
+		"cyan"
+		"lime"
+		"green"
+		"magenta"
+		"purple"
+		"pink"
+		"red"
+		"yellow"
+		"orange"
+		"brown"
+	If anything else no color block is placed.
+
+	For example:
+	{
+		{
+			{ "black", nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, "green" },
+			{},
+			{},
+			{},
+			{},
+			{},
+			{},
+			{},
+			{},
+			{},
+			{},
+			{},
+			{},
+			{},
+			{ "blue", nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, "red" }
+		},
+		{},
+		{},
+		{},
+		{},
+		{},
+		{},
+		{},
+		{},
+		{},
+		{},
+		{},
+		{},
+		{},
+		{
+			{ "orange", nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, "lime" },
+			{},
+			{},
+			{},
+			{},
+			{},
+			{},
+			{},
+			{},
+			{},
+			{},
+			{},
+			{},
+			{},
+			{ "purple", nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, "yellow" }
+		},
+	}
+
+	will display a hologram with a black and green block at the back of
+	the bottom layer, and orange and lime at the back of the top layer.

docs/movefloor.txt

@@ -0,0 +1,17 @@
+MoveFloor
+---------
+* This block is only available if mesecons and mesecons_mvps is loaded.
+
+The MoveFloor block responds to a mesecons power source in the 4 horizontal
+directions. If the power source is one higher the MoveFloor moves up to
+that height. If the power source is one lower the MoveFloor moves down to
+that height. Powering an adjacent block has no effect. The power source
+should be turned off before another move or the MoveFloor will oscillate.
+
+Any horizontally adjoining MoveFloor acts as a single block (only one
+needs to be powered).
+
+The MoveFloor will move up to 3 blocks stacked on it.
+
+If using a DigiSwitch as the power source use the side name "switch" or
+the MoveFloor will not move.

docs/pistons.txt

@@ -0,0 +1,31 @@
+Pistons and sticky pistons
+--------------------------
+* These blocks are only available if digilines and/or mesecons are loaded.
+
+Pistons push up to the setting Maximum piston nodes (default 15) in front
+of the pusher when extended. Sticky piston draw back a single node in
+front of the pusher when retracted. Piston also act as a digilines
+conductor.
+
+UI
+
+Channel - digilines channel of piston.
+Single move - pusher extends 1 node if checked, otherwise 2 nodes.
+
+Mesecons
+	Piston extends while power is turned on.
+
+Digilines messages
+
+"extend n"
+	Extends the piston pusher to extent n (0, 1 or 2). If n is not given
+	pusher extends to maximum extent. 0 is retracted.
+
+"retract"
+	Same as 'extend 0'.
+
+"single"
+	Sets piston to single move mode.
+
+"double"
+	Sets piston to double move mode.

docs/player_button.txt

@@ -0,0 +1,21 @@
+Player Button
+-------------
+* This block is only available if both digilines and digistuff are loaded.
+
+When pressed sends a digilines message with the name of the player that
+pressed the button.
+
+The first time the button is right clicked a form opens to set the
+digilines channel. After that right click presses the button. The
+digilines cannot be changed after its set.
+
+UI
+
+Channel - digilines channel of button.
+
+When the button is pressed a digilines message is sent with the button's
+channel in the form:
+{
+	action = "player",
+	name = <player name>
+}

docs/puncher.txt

@@ -0,0 +1,69 @@
+Puncher
+-------
+* This block is only available if digilines and/or mesecons are loaded.
+
+Punches players or entities within a given reach. Also acts as a
+digilines conductor.
+
+Only the owner can dig or access the form of the locked version.
+
+UI
+
+Channel - digilines channel of puncher.
+Reach - block distance from puncher to punch.
+Entities - if checked punches entities.
+Players - if checked punches players.
+
+mode:
+	Forward - punches to reach extent directly in front of the puncher (one block high).
+	Up - detects to reach extent directly above the puncher (one block wide).
+	Down - detects to reach extent directly below the puncher (one block wide).
+
+Mesecons
+	Punches the next item when power is turned on.
+
+Digilines messages
+
+"start"
+	Start the puncher.
+
+"stop"
+	Stop the puncher.
+
+"reach <n>"
+	Set reach of the puncher. <n> should be a number from 1 to 5, and is
+	trimmed to this range.
+
+"entities <true|false>"
+	Set punching of entities on or off.
+
+"players <true|false>"
+	Set punching of players on or off.
+
+"mode forward"
+"mode up"
+"mode down"
+	Set the puncher's mode.
+
+"punch"
+	Action a single punch if the puncher is turned on.
+
+When a player or entity is punched a digilines message is sent with the
+puncher's channel. The message is a table with the following keys:
+{
+	action = "punch",
+	type = "<type>", -- will be "entity" or "player"
+	name = "<name>",
+	label = "<label>"
+}
+
+type
+	Will be "entity" or "player".
+
+name
+	For "entity" the registered entity name.
+	For "player" the player's name.
+
+label
+	For "entity" the name tag text.
+	For "player" the player's name.

docs/siren.txt

@@ -0,0 +1,46 @@
+Siren
+-----
+* This block is only available if digilines and/or mesecons are loaded.
+
+Plays a sound repeatedly while active. Also acts as a digilines conductor.
+digilines conductor.
+
+Only the owner can dig or access the form of the locked version.
+
+UI
+
+Channel - digilines channel of siren.
+Distance - block distance the sound can be heard (range 0 to 100).
+Volume - volume the sound is played.
+Sound - select Buzzer, Horn, Raid or Siren.
+
+Mesecons
+	Sound plays while mesecons power is applied.
+
+Digilines messages
+
+"start"
+	Start the siren (turn on).
+
+"stop"
+	Stop the siren (turn off).
+
+"distance <n>"
+	Set block distance the sound can be heard. <n> should be a number
+	from 1 to 100, and is trimmed to this range.
+
+"volume <n>"
+	Set the sound volume. <n> should be a number from 1 to 100, and is
+	trimmed to this range.
+
+"sound buzzer"
+"sound horn"
+"sound raid"
+"sound siren"
+	Set the sound of the siren.
+
+"siren on"
+	Activate the siren, if its on.
+
+"siren off"
+	deactivate the siren.

docs/solid_color_conductors.txt

@@ -0,0 +1,9 @@
+Solid Color Conductors
+----------------------
+* These blocks are only defined if mesecons and unifieddyes are loaded.
+
+Provides 2 blocks that can be colored the same as Solid Color Block (with
+the air brush) and is both a mesecons and digilines conductor.
+
+The Solid Color Conductor block conducts in the 'default' directions and
+the Solid Color Horizontal Conductor only conducts horizontally.

docs/through_wire.txt

@@ -0,0 +1,7 @@
+Mesecons Through Wire
+---------------------
+* This block is only available if mesecons is loaded.
+
+Will transmit mesecons power when placed one to two blocks apart opposing
+each other, through solid blocks or open space. Can also be used as a mesecons
+crossover.

dropper.lua

@@ -301,7 +301,9 @@ local function digilines_support ()
 					if meta then
 						local this_channel = meta:get_string ("channel")
 
-						if this_channel ~= "" and this_channel == channel then
+						if this_channel ~= "" and this_channel == channel and
+							type (msg) == "string" then
+
 							local m = { }
 							for w in string.gmatch(msg, "[^%s]+") do
 								m[#m + 1] = w

explode.lua

@@ -0,0 +1,512 @@
+local utils = ...
+local S = utils.S
+
+
+
+
+local explode = { }
+
+
+
+if minetest.global_exists ("fire") then
+
+
+explode.fire_supported = true
+
+
+function explode.set_fire (pos, burn_all)
+	local node = utils.get_far_node (pos)
+
+	if not node then
+		return
+	end
+
+	if node.name ~= "air" then
+		local def = minetest.registered_nodes[node.name]
+
+		if not def or not def.buildable_to then
+			return
+		end
+	end
+
+	local dirs =
+	{
+		{ x = 0, y = -1, z = 0 },
+		{ x = -1, y = 0, z = 0 },
+		{ x = 0, y = 0, z = -1 },
+		{ x = 1, y = 0, z = 0 },
+		{ x = 0, y = 0, z = 1 }
+	}
+
+	for i = 1, #dirs do
+		node = utils.get_far_node (vector.add (pos, dirs[i]))
+
+		if node and node.name ~= "air" and node.name ~= "fire:basic_flame" then
+			local def = minetest.registered_nodes[node.name]
+
+			if def and def.liquidtype == "none" then
+				if (def.groups and def.groups.flammable) or burn_all then
+					minetest.set_node (pos, { name = "fire:basic_flame" })
+
+					return
+				end
+			end
+		end
+	end
+end
+
+
+else
+
+
+explode.fire_supported = false
+
+
+function explode.set_fire (pos, burn_all)
+end
+
+
+end
+
+
+
+local function is_same_item (stack1, stack2)
+	local copy1 = ItemStack (stack1)
+	local copy2 = ItemStack (stack2)
+
+	if copy1 and copy2 then
+		copy1:set_count (1)
+		copy2:set_count (1)
+
+		if copy1:to_string () == copy2:to_string () then
+			return true
+		end
+	end
+
+	return false
+end
+
+
+
+local function dig_node (pos, toolname)
+	local node = utils.get_far_node (pos)
+	local dig = false
+	local drops = nil
+
+	if toolname == true then
+		dig = true
+		toolname = nil
+	end
+
+	if node and node.name ~= "air" then
+		local def = utils.find_item_def (node.name)
+
+		if not dig then
+			if def and def.can_dig then
+				local result, can_dig = pcall (def.can_dig, pos)
+
+				dig = ((not result) or (result and (can_dig == nil or can_dig == true)))
+			else
+				dig = true
+			end
+		end
+
+		if dig then
+			local items = minetest.get_node_drops (node, toolname)
+
+			if items then
+				drops = { }
+
+				for i = 1, #items do
+					drops[i] = ItemStack (items[i])
+				end
+
+				if def and def.preserve_metadata then
+					def.preserve_metadata (pos, node, minetest.get_meta (pos), drops)
+				end
+			end
+
+			minetest.remove_node (pos)
+		end
+	end
+
+	return drops
+end
+
+
+
+local function add_drops (drops, drop)
+	if drops and drop then
+		for i = 1, #drop do
+			local item = ItemStack (drop[i])
+
+			if item and not item:is_empty () then
+				local existing = drops[item:get_name ()]
+
+				if existing and is_same_item (item, existing) then
+					existing:set_count (existing:get_count () + item:get_count ())
+				else
+					drops[item:get_name ()] = item
+				end
+			end
+		end
+	end
+end
+
+
+
+local function explode_node (pos, dig_chance, intensity, drops, filter)
+	if not utils.is_protected (pos, nil) then
+		dig_chance = math.min (math.max (dig_chance, 0), 100)
+
+		if math.random (100) <= dig_chance then
+			local node = utils.get_far_node (pos)
+			local blasted = false
+
+			if node and node.name ~= "air" then
+				local def = minetest.registered_nodes[node.name]
+
+				if def then
+					if def.diggable == false then
+						return false
+					end
+
+					for k, v in pairs (filter) do
+						if def[k] == nil then
+							if filter[k.."_undefined"] == false then
+								return false
+							end
+						elseif def[k] ~= v then
+							return false
+						end
+					end
+
+					if def.on_blast then
+						def.on_blast (pos, intensity)
+						blasted = true
+					end
+				end
+
+				if not blasted then
+					local drop = dig_node (pos, true)
+
+					add_drops (drops, drop)
+				end
+
+				minetest.check_for_falling ({ x = pos.x, y = pos.y + 1, z = pos.z })
+
+				return true
+			end
+		end
+	end
+
+	return false
+end
+
+
+
+local function burn_node (pos, fire_chance, burn_all)
+	if not utils.is_protected (pos, nil) then
+		fire_chance = math.min (math.max (fire_chance, 0), 100)
+
+		if math.random (100) <= fire_chance then
+			explode.set_fire (pos, burn_all)
+		end
+	end
+end
+
+
+
+local function entity_is_drop (obj)
+	return obj.get_luaentity and obj:get_luaentity () and
+			 obj:get_luaentity ().name and
+			 obj:get_luaentity ().name == "__builtin:item"
+end
+
+
+
+local function explode_entities (pos, radius, damage, drops)
+	local objs = minetest.get_objects_inside_radius (pos, radius)
+
+	for _, obj in pairs (objs) do
+		local obj_pos = obj:get_pos ()
+		local dir = vector.direction (pos, obj_pos)
+		local dist = vector.length (vector.subtract (obj_pos, pos))
+		local vel = vector.multiply (dir, ((radius + 1) - dist) / (radius + 1) * damage * 5)
+
+		if entity_is_drop (obj) then
+			obj:add_velocity (vel)
+
+		elseif not obj:get_armor_groups ().immortal then
+
+			local ent_damage = ((radius - dist) / radius * damage / 2) + (damage / 2)
+			local reason = { type = "set_hp", from = "lwcomponents" }
+
+			if obj:is_player() then
+				obj:add_velocity (vel)
+
+				obj:set_hp (obj:get_hp() - ent_damage, reason)
+
+			else
+				local luaobj = obj:get_luaentity()
+
+				-- object might have disappeared somehow
+				if luaobj then
+					local do_damage = true
+					local do_knockback = true
+					local entity_drops = {}
+					local objdef = minetest.registered_entities[luaobj.name]
+
+					if objdef and objdef.on_blast then
+						do_damage, do_knockback, entity_drops = objdef.on_blast (luaobj, ent_damage)
+					end
+
+					if do_knockback then
+						obj:add_velocity (vel)
+					end
+
+					if do_damage then
+						obj:set_hp (obj:get_hp() - ent_damage, reason)
+					end
+
+					add_drops (drops, entity_drops)
+				end
+			end
+		end
+	end
+end
+
+
+
+local function spray_drops (pos, drops, damage)
+	local max_vel = damage * 2.5
+
+	for k, stack in pairs (drops) do
+		local vel =
+		{
+			x = math.random (max_vel) - (max_vel / 2),
+			y = math.random (max_vel) - (max_vel / 2),
+			z = math.random (max_vel) - (max_vel / 2)
+		}
+
+		local drop = minetest.add_item (pos, stack)
+
+		if drop then
+			drop:set_velocity (vel)
+		end
+	end
+end
+
+
+
+local function add_effects (pos, radius, drops)
+	minetest.add_particle ({
+		pos = pos,
+		velocity = vector.new (),
+		acceleration = vector.new (),
+		expirationtime = 0.4,
+		size = 30, -- radius * 10,
+		collisiondetection = false,
+		vertical = false,
+		texture = "lwcomponents_boom.png",
+		glow = 15,
+	})
+
+	minetest.add_particlespawner ({
+		amount = 64,
+		time = 0.5,
+		minpos = vector.subtract (pos, radius / 2),
+		maxpos = vector.add (pos, radius / 2),
+		minvel = {x = -10, y = -10, z = -10},
+		maxvel = {x = 10, y = 10, z = 10},
+		minacc = vector.new (),
+		maxacc = vector.new (),
+		minexptime = 1,
+		maxexptime = 2.5,
+		minsize = 9,  -- radius * 3,
+		maxsize = 15, -- radius * 5,
+		texture = "lwcomponents_smoke.png",
+	})
+
+	-- we just dropped some items. Look at the items entities and pick
+	-- one of them to use as texture
+	local texture = "lwcomponents_blast.png" --fallback texture
+	local node
+	local most = 0
+
+	if drops then
+		for name, stack in pairs (drops) do
+			local count = stack:get_count()
+			if count > most then
+				most = count
+				local def = minetest.registered_nodes[name]
+				if def then
+					node = { name = name }
+				end
+				if def and def.tiles and def.tiles[1] then
+					if type (def.tiles[1]) == "table" then
+						texture = def.tiles[1].name or "lwcomponents_blast.png"
+					elseif type (def.tiles[1]) == "string" then
+						texture = def.tiles[1]
+					end
+				end
+			end
+		end
+	end
+
+	minetest.add_particlespawner ({
+		amount = 64,
+		time = 0.1,
+		minpos = vector.subtract (pos, radius / 2),
+		maxpos = vector.add (pos, radius / 2),
+		minvel = {x = -3, y = 0, z = -3},
+		maxvel = {x = 3, y = 5,  z = 3},
+		minacc = {x = 0, y = -10, z = 0},
+		maxacc = {x = 0, y = -10, z = 0},
+		minexptime = 0.8,
+		maxexptime = 2.0,
+		minsize = 1, -- radius * 0.33,
+		maxsize = 3, -- radius,
+		texture = texture,
+		-- ^ only as fallback for clients without support for `node` parameter
+		node = node,
+		collisiondetection = true,
+	})
+end
+
+
+
+function utils.boom (pos,									-- center of explosion
+							node_radius, node_chance,		-- radius and chance in 100
+							fire_radius, fire_chance,		-- radius and chance in 100
+							entity_radius, entity_damage,	-- radius and max damage applied
+							disable_drops,						-- true to disable drops
+							node_filter,						-- node filter table as { buildable_to = true, buildable_to_undefined = false, ... }
+							burn_all,							-- true to set fire to anything, otherwise only flammable
+							sound)								-- sound on blast, if nil plays default
+
+	pos = vector.round (pos)
+	node_radius = math.floor (node_radius or 1)
+	fire_radius = math.floor (fire_radius or node_radius)
+	entity_radius = math.floor (entity_radius or node_radius * 2)
+	node_chance = node_chance or 80
+	fire_chance = fire_chance or 30
+	entity_damage = math.floor (entity_damage or entity_radius)
+	disable_drops = disable_drops == true
+	node_filter = node_filter or { }
+	burn_all = burn_all == true
+	sound = sound or "lwcannon"
+
+	local drops = { }
+	local effects_radius = (node_radius > 0 and node_radius) or entity_radius
+	local center_free = false
+
+	if not utils.is_protected (pos, nil) then
+		local center_node = utils.get_far_node (pos)
+
+		if not node or node.name == "air" then
+			center_free = true
+		end
+	end
+
+	if node_radius > 0 and node_chance > 0 then
+		local extents = node_radius * 2
+
+		for y = -extents, extents, 1 do
+			for z = -extents, extents, 1 do
+				for x = -extents, extents, 1 do
+					local node_pos = { x = x + pos.x, y = y + pos.y, z = z + pos.z }
+					local length = vector.length ({ x = x, y = y, z = z })
+
+					if node_chance > 0 and length <= node_radius then
+						if explode_node (node_pos, node_chance, 1.0, drops, node_filter) then
+							if vector.equals (pos, node_pos) then
+								center_free = true
+							end
+						end
+					end
+				end
+			end
+		end
+	end
+
+	if fire_radius > 0 and fire_chance > 0 then
+		local extents = fire_radius * 2
+
+		for y = -extents, extents, 1 do
+			for z = -extents, extents, 1 do
+				for x = -extents, extents, 1 do
+					local node_pos = { x = x + pos.x, y = y + pos.y, z = z + pos.z }
+					local length = vector.length ({ x = x, y = y, z = z })
+
+					if fire_chance > 0 and length <= fire_radius then
+						burn_node (node_pos, fire_chance, burn_all)
+					end
+				end
+			end
+		end
+	end
+
+	minetest.sound_play (sound,
+								{
+									pos = pos,
+									gain = 2.5,
+									max_hear_distance = math.min (effects_radius * 20, 128)
+								},
+								true)
+
+	if center_free then
+		minetest.set_node (pos, { name = "lwcomponents:boom" })
+	end
+
+	explode_entities (pos, entity_radius, entity_damage, drops)
+
+	if not disable_drops then
+		spray_drops (pos, drops, entity_damage)
+	end
+
+	add_effects (pos, effects_radius, drops)
+
+
+	minetest.log ("action", "A Shell explosion occurred at " .. minetest.pos_to_string (pos) ..
+									" with radius " .. entity_radius)
+end
+
+
+
+minetest.register_node ("lwcomponents:boom", {
+	description = S("Boom"),
+	drawtype = "airlike",
+	tiles = { "lwcomponents_boom.png" },
+	inventory_image = "lwcomponents_boom.png",
+	wield_image = "lwcomponents_boom.png",
+	light_source = default.LIGHT_MAX,
+	use_texture_alpha = "blend",
+	sunlight_propagates = true,
+	walkable = false,
+	pointable = false,
+	diggable = false,
+	climbable = false,
+	buildable_to = true,
+	floodable = true,
+	is_ground_content = false,
+	drop = "",
+	paramtype = "light",
+	param1 = 255,
+	post_effect_color = { a = 128, r = 255, g = 0, b = 0 },
+	groups = { dig_immediate = 3, not_in_creative_inventory = 1 },
+	on_construct = function (pos)
+		minetest.get_node_timer (pos):start (0.5)
+	end,
+	on_timer = function (pos, elapsed)
+		minetest.remove_node (pos)
+
+		return false
+	end,
+	-- unaffected by explosions
+	on_blast = function() end,
+})
+
+
+
+--

fan.lua

@@ -0,0 +1,455 @@
+local utils = ...
+local S = utils.S
+
+
+
+if utils.digilines_supported or utils.mesecon_supported then
+
+
+
+local fan_interval = 0.2
+local fan_force = 15.0
+
+
+
+local function direction_vector (node)
+	local axis = math.floor (node.param2 / 4)
+	local rotate = node.param2 % 4
+	local vec = { x = 0, y = 0, z = 0 }
+
+	if rotate == 0 then
+		vec = { x = 0, y = 0, z = -1 }
+	elseif rotate == 1 then
+		vec = { x = -1, y = 0, z = 0 }
+	elseif rotate == 2 then
+		vec = { x = 0, y = 0, z = 1 }
+	elseif rotate == 3 then
+		vec = { x = 1, y = 0, z = 0 }
+	end
+
+	if axis == 1 then
+		vec = vector.rotate (vec, { x = math.pi / -2, y = 0, z = 0 })
+	elseif axis == 2 then
+		vec = vector.rotate (vec, { x = math.pi / 2, y = 0, z = 0 })
+	elseif axis == 3 then
+		vec = vector.rotate (vec, { x = 0, y = 0, z = math.pi / 2 })
+	elseif axis == 4 then
+		vec = vector.rotate (vec, { x = 0, y = 0, z = math.pi / -2 })
+	elseif axis == 5 then
+		vec = vector.rotate (vec, { x = math.pi, y = 0, z = 0 })
+	end
+
+	return vec
+end
+
+
+
+local function blow (pos)
+	local meta = minetest.get_meta (pos)
+	local node = minetest.get_node (pos)
+	local dir = direction_vector (node)
+	local reach = 5
+
+	for r = 1, reach, 1 do
+		local tpos = vector.add (pos, vector.multiply (dir, r))
+		local tnode = minetest.get_node_or_nil (tpos)
+
+		if tnode and tnode.name ~= "air" then
+			local def = utils.find_item_def (tnode.name)
+
+			if def and def.walkable then
+				return
+			end
+		end
+
+		local object = minetest.get_objects_inside_radius (tpos, 1.5)
+		local vel = vector.multiply (dir, (dir.y > 0 and fan_force / 2) or fan_force)
+
+		for i = 1, #object do
+			if object[i].add_velocity then
+				local opos = object[i]:get_pos ()
+
+				if opos.x >= (tpos.x - 0.5) and opos.x <= (tpos.x + 0.5) and
+					opos.z >= (tpos.z - 0.5) and opos.z <= (tpos.z + 0.5) and
+					opos.y >= (tpos.y - 0.5) and opos.y <= (tpos.y + 0.5) then
+
+					if object[i].get_luaentity and object[i]:get_luaentity () and
+						object[i]:get_luaentity ().name and
+						object[i]:get_luaentity ().name == "__builtin:item" then
+
+						object[i]:add_velocity (vector.multiply (vel, 5))
+					else
+						object[i]:add_velocity (vel)
+					end
+				end
+			end
+		end
+	end
+end
+
+
+
+local function fan_off (pos)
+	local node = minetest.get_node (pos)
+
+	if node then
+		if node.name == "lwcomponents:fan_on" then
+			node.name = "lwcomponents:fan"
+
+			minetest.get_node_timer (pos):stop ()
+			minetest.swap_node (pos, node)
+
+		elseif node.name == "lwcomponents:fan_locked_on" then
+			node.name = "lwcomponents:fan_locked"
+
+			minetest.get_node_timer (pos):stop ()
+			minetest.swap_node (pos, node)
+
+		end
+	end
+end
+
+
+
+local function fan_on (pos)
+	local node = minetest.get_node (pos)
+
+	if node then
+		if node.name == "lwcomponents:fan" then
+			node.name = "lwcomponents:fan_on"
+
+			minetest.swap_node (pos, node)
+			minetest.get_node_timer (pos):start (fan_interval)
+
+		elseif node.name == "lwcomponents:fan_locked" then
+			node.name = "lwcomponents:fan_locked_on"
+
+			minetest.swap_node (pos, node)
+			minetest.get_node_timer (pos):start (fan_interval)
+
+		end
+	end
+end
+
+
+
+local function on_place (itemstack, placer, pointed_thing)
+	local param2 = 0
+
+	if placer and placer:is_player () then
+		param2 = minetest.dir_to_facedir (placer:get_look_dir (), true)
+	elseif pointed_thing and pointed_thing.type == "node" then
+		param2 = minetest.dir_to_facedir (vector.subtract (pointed_thing.under, pointed_thing.above), true)
+	end
+
+	return minetest.item_place (itemstack, placer, pointed_thing, param2)
+end
+
+
+
+
+local function after_place_node (pos, placer, itemstack, pointed_thing)
+	local meta = minetest.get_meta (pos)
+	local spec =
+	"size[7.5,3]"..
+	"field[1,1;6,2;channel;Channel;${channel}]"..
+	"button_exit[2.5,2;3,1;submit;Set]"
+
+	meta:set_string ("formspec", spec)
+
+	-- If return true no item is taken from itemstack
+	return false
+end
+
+
+
+local function after_place_node_locked (pos, placer, itemstack, pointed_thing)
+	after_place_node (pos, placer, itemstack, pointed_thing)
+
+	if placer and placer:is_player () then
+		local meta = minetest.get_meta (pos)
+
+		meta:set_string ("owner", placer:get_player_name ())
+		meta:set_string ("infotext", "Fan (owned by "..placer:get_player_name ()..")")
+	end
+
+	-- If return true no item is taken from itemstack
+	return false
+end
+
+
+
+local function on_receive_fields (pos, formname, fields, sender)
+	if not utils.can_interact_with_node (pos, sender) then
+		return
+	end
+
+	local meta = minetest.get_meta(pos)
+
+	if fields.submit then
+		meta:set_string ("channel", fields.channel)
+	end
+end
+
+
+
+local function on_blast (pos, intensity)
+	local meta = minetest.get_meta (pos)
+
+	if meta then
+		if intensity >= 1.0 then
+
+			minetest.remove_node (pos)
+
+		else -- intensity < 1.0
+
+			local node = minetest.get_node_or_nil (pos)
+			if node then
+				local items = minetest.get_node_drops (node, nil)
+
+				if items and #items > 0 then
+					local stack = ItemStack (items[1])
+
+					if stack then
+						preserve_metadata (pos, node, meta, { stack })
+						utils.item_drop (stack, nil, pos)
+						minetest.remove_node (pos)
+					end
+				end
+			end
+		end
+	end
+end
+
+
+
+local function can_dig (pos, player)
+	if not utils.can_interact_with_node (pos, player) then
+		return false
+	end
+
+	return true
+end
+
+
+
+local function on_rightclick (pos, node, clicker, itemstack, pointed_thing)
+	if not utils.can_interact_with_node (pos, clicker) then
+		if clicker and clicker:is_player () then
+			local owner = "<unknown>"
+			local meta = minetest.get_meta (pos)
+
+			if meta then
+				owner = meta:get_string ("owner")
+			end
+
+			local spec =
+			"formspec_version[3]"..
+			"size[8.0,4.0,false]"..
+			"label[1.0,1.0;Owned by "..minetest.formspec_escape (owner).."]"..
+			"button_exit[3.0,2.0;2.0,1.0;close;Close]"
+
+			minetest.show_formspec (clicker:get_player_name (),
+											"lwcomponents:component_privately_owned",
+											spec)
+		end
+	end
+
+	return itemstack
+end
+
+
+
+local function on_timer (pos, elapsed)
+	blow (pos)
+
+	return true
+end
+
+
+
+local function digilines_support ()
+	if utils.digilines_supported then
+		return
+		{
+			wire =
+			{
+				rules = utils.digilines_default_rules,
+			},
+
+			effector =
+			{
+				action = function (pos, node, channel, msg)
+					local meta = minetest.get_meta(pos)
+
+					if meta then
+						local this_channel = meta:get_string ("channel")
+
+						if this_channel ~= "" and this_channel == channel then
+							if type (msg) == "string" then
+								local m = { }
+								for w in string.gmatch(msg, "[^%s]+") do
+									m[#m + 1] = w
+								end
+
+								if m[1] == "start" then
+									fan_on (pos)
+
+								elseif m[1] == "stop" then
+									fan_off (pos)
+
+								end
+							end
+						end
+					end
+				end,
+			}
+		}
+	end
+
+	return nil
+end
+
+
+
+local function mesecon_support ()
+	if utils.mesecon_supported then
+		return
+		{
+			effector =
+			{
+				rules = utils.mesecon_default_rules,
+
+				action_on = function (pos, node)
+					-- do something to turn the effector on
+					fan_on (pos)
+				end,
+
+				action_off = function (pos, node)
+					-- do something to turn the effector off
+					fan_off (pos)
+				end,
+			}
+		}
+	end
+
+	return nil
+end
+
+
+
+minetest.register_node("lwcomponents:fan", {
+	description = S("Fan"),
+	tiles = { "lwfan.png", "lwfan.png", "lwfan.png",
+				 "lwfan.png", "lwfan.png", "lwfan_face.png"},
+	is_ground_content = false,
+	groups = { cracky = 3 },
+	sounds = default.node_sound_stone_defaults (),
+	paramtype = "none",
+	param1 = 0,
+	paramtype2 = "facedir",
+	param2 = 0,
+	floodable = false,
+	drop = "lwcomponents:fan",
+	_digistuff_channelcopier_fieldname = "channel",
+
+	mesecons = mesecon_support (),
+	digiline = digilines_support (),
+
+	on_place = on_place,
+	on_receive_fields = on_receive_fields,
+	can_dig = can_dig,
+	after_place_node = after_place_node,
+	on_blast = on_blast,
+	on_rightclick = on_rightclick,
+})
+
+
+
+minetest.register_node("lwcomponents:fan_locked", {
+	description = S("Fan (locked)"),
+	tiles = { "lwfan.png", "lwfan.png", "lwfan.png",
+				 "lwfan.png", "lwfan.png", "lwfan_face.png"},
+	is_ground_content = false,
+	groups = { cracky = 3 },
+	sounds = default.node_sound_stone_defaults (),
+	paramtype = "none",
+	param1 = 0,
+	paramtype2 = "facedir",
+	param2 = 0,
+	floodable = false,
+	drop = "lwcomponents:fan_locked",
+	_digistuff_channelcopier_fieldname = "channel",
+
+	mesecons = mesecon_support (),
+	digiline = digilines_support (),
+
+	on_place = on_place,
+	on_receive_fields = on_receive_fields,
+	can_dig = can_dig,
+	after_place_node = after_place_node_locked,
+	on_blast = on_blast,
+	on_rightclick = on_rightclick,
+})
+
+
+
+minetest.register_node("lwcomponents:fan_on", {
+	description = S("Fan"),
+	tiles = { "lwfan.png", "lwfan.png", "lwfan.png",
+				 "lwfan.png", "lwfan.png", "lwfan_face_on.png"},
+	is_ground_content = false,
+	groups = { cracky = 3, not_in_creative_inventory = 1 },
+	sounds = default.node_sound_stone_defaults (),
+	paramtype = "none",
+	param1 = 0,
+	paramtype2 = "facedir",
+	param2 = 0,
+	floodable = false,
+	drop = "lwcomponents:fan",
+	_digistuff_channelcopier_fieldname = "channel",
+
+	mesecons = mesecon_support (),
+	digiline = digilines_support (),
+
+	on_place = on_place,
+	on_receive_fields = on_receive_fields,
+	can_dig = can_dig,
+	after_place_node = after_place_node,
+	on_blast = on_blast,
+	on_timer = on_timer,
+	on_rightclick = on_rightclick,
+})
+
+
+
+minetest.register_node("lwcomponents:fan_locked_on", {
+	description = S("Fan (locked)"),
+	tiles = { "lwfan.png", "lwfan.png", "lwfan.png",
+				 "lwfan.png", "lwfan.png", "lwfan_face_on.png"},
+	is_ground_content = false,
+	groups = { cracky = 3, not_in_creative_inventory = 1 },
+	sounds = default.node_sound_stone_defaults (),
+	paramtype = "none",
+	param1 = 0,
+	paramtype2 = "facedir",
+	param2 = 0,
+	floodable = false,
+	drop = "lwcomponents:fan_locked",
+	_digistuff_channelcopier_fieldname = "channel",
+
+	mesecons = mesecon_support (),
+	digiline = digilines_support (),
+
+	on_place = on_place,
+	on_receive_fields = on_receive_fields,
+	can_dig = can_dig,
+	after_place_node = after_place_node_locked,
+	on_blast = on_blast,
+	on_timer = on_timer,
+	on_rightclick = on_rightclick,
+})
+
+
+
+end -- utils.digilines_supported or utils.mesecon_supported

hologram.lua

@@ -0,0 +1,424 @@
+local utils = ...
+local S = utils.S
+
+
+
+if utils.digilines_supported then
+
+
+
+local hologram_block =
+{
+	black = {
+		node = "lwcomponents:hologram_black",
+		image = "lwhologram_black.png",
+		color = { a = 128, r = 0, g = 0, b = 0 } },
+	orange = {
+		node = "lwcomponents:hologram_orange",
+		image = "lwhologram_orange.png",
+		color = { a = 128, r = 255, g = 128, b = 0 } },
+	magenta = {
+		node = "lwcomponents:hologram_magenta",
+		image = "lwhologram_magenta.png",
+		color = { a = 128, r = 255, g = 0, b = 255 } },
+	sky = {
+		node = "lwcomponents:hologram_sky",
+		image = "lwhologram_sky.png",
+		color = { a = 128, r = 0, g = 128, b = 255 } },
+	yellow = {
+		node = "lwcomponents:hologram_yellow",
+		image = "lwhologram_yellow.png",
+		color = { a = 128, r = 255, g = 255, b = 0 } },
+	pink = {
+		node = "lwcomponents:hologram_pink",
+		image = "lwhologram_pink.png",
+		color = { a = 128, r = 255, g = 128, b = 128 } },
+	cyan = {
+		node = "lwcomponents:hologram_cyan",
+		image = "lwhologram_cyan.png",
+		color = { a = 128, r = 0, g = 255, b = 255 } },
+	gray = {
+		node = "lwcomponents:hologram_gray",
+		image = "lwhologram_gray.png",
+		color = { a = 128, r = 128, g = 128, b = 128 } },
+	silver = {
+		node = "lwcomponents:hologram_silver",
+		image = "lwhologram_silver.png",
+		color = { a = 128, r = 192, g = 192, b = 192 } },
+	red = {
+		node = "lwcomponents:hologram_red",
+		image = "lwhologram_red.png",
+		color = { a = 128, r = 255, g = 0, b = 0 } },
+	green = {
+		node = "lwcomponents:hologram_green",
+		image = "lwhologram_green.png",
+		color = { a = 128, r = 0, g = 128, b = 0 } },
+	blue = {
+		node = "lwcomponents:hologram_blue",
+		image = "lwhologram_blue.png",
+		color = { a = 128, r = 0, g = 0, b = 255 } },
+	brown = {
+		node = "lwcomponents:hologram_brown",
+		image = "lwhologram_brown.png",
+		color = { a = 128, r = 128, g = 64, b = 0 } },
+	lime = {
+		node = "lwcomponents:hologram_lime",
+		image = "lwhologram_lime.png",
+		color = { a = 128, r = 0, g = 255, b = 0 } },
+	purple = {
+		node = "lwcomponents:hologram_purple",
+		image = "lwhologram_purple.png",
+		color = { a = 128, r = 128, g = 0, b = 128 } },
+	white = {
+		node = "lwcomponents:hologram_white",
+		image = "lwhologram_white.png",
+		color = { a = 128, r = 255, g = 255, b = 255 } },
+}
+
+
+
+local function rotate_to_dir (center, param2, point)
+	local base = vector.subtract (point, center)
+
+	if param2 == 1 then
+		base = vector.rotate (base, { x = 0, y = (math.pi * 1.5), z = 0 })
+	elseif param2 == 2 then
+		base = vector.rotate (base, { x = 0, y = math.pi, z = 0 })
+	elseif param2 == 3 then
+		base = vector.rotate (base, { x = 0, y = (math.pi * 0.5), z = 0 })
+	end
+
+	return vector.add (base, center)
+end
+
+
+
+local function draw_map (pos, map)
+	local meta = minetest.get_meta (pos)
+	local holonode = minetest.get_node (pos)
+
+	if meta and holonode and type (map) == "table" then
+		local id = meta:get_int ("block_id")
+
+		for y = 1, 15 do
+			local layer = (type (map[y]) == "table" and map[y]) or { }
+
+			for x = 1, 15 do
+				local line = (type (layer[x]) == "table" and layer[x]) or { }
+
+				for z = 1, 15 do
+					local map_point = { x = z + pos.x - 8, y = y + pos.y + 1, z = (16 - x) + pos.z - 8 }
+					local holopos = rotate_to_dir (pos, holonode.param2, map_point)
+
+					local node = utils.get_far_node (holopos)
+					local draw = false
+
+					if node and node.name ~= "air" then
+						if node.name:sub (1, 22) == "lwcomponents:hologram_" then
+							local nodemeta = minetest.get_meta (holopos)
+
+							if nodemeta and nodemeta:get_int ("block_id") == id then
+								draw = true
+							end
+						end
+					else
+						draw = true
+					end
+
+					if draw then
+						local holonode = hologram_block[line[z]]
+
+						if node then
+							utils.destroy_node (holopos)
+						end
+
+						if holonode then
+							minetest.set_node (holopos, { name = holonode.node })
+
+							local nodemeta = minetest.get_meta (holopos)
+
+							if nodemeta then
+								nodemeta:set_int ("block_id", id)
+							end
+						end
+					end
+				end
+			end
+		end
+	end
+end
+
+
+
+local function clear_map (pos)
+	draw_map (pos, { })
+end
+
+
+
+local function on_destruct (pos)
+	clear_map (pos)
+end
+
+
+
+local function after_place_node (pos, placer, itemstack, pointed_thing)
+	local meta = minetest.get_meta (pos)
+	local spec =
+	"size[7.5,3]"..
+	"field[1,1;6,2;channel;Channel;${channel}]"..
+	"button_exit[2.5,2;3,1;submit;Set]"
+	local id = math.random (1000000)
+
+	meta:set_string ("formspec", spec)
+	meta:set_int ("block_id", id)
+
+	-- If return true no item is taken from itemstack
+	return false
+end
+
+
+
+local function after_place_node_locked (pos, placer, itemstack, pointed_thing)
+	after_place_node (pos, placer, itemstack, pointed_thing)
+
+	if placer and placer:is_player () then
+		local meta = minetest.get_meta (pos)
+
+		meta:set_string ("owner", placer:get_player_name ())
+		meta:set_string ("infotext", "Hologram (owned by "..placer:get_player_name ()..")")
+	end
+
+	-- If return true no item is taken from itemstack
+	return false
+end
+
+
+
+local function on_receive_fields (pos, formname, fields, sender)
+	if not utils.can_interact_with_node (pos, sender) then
+		return
+	end
+
+	local meta = minetest.get_meta(pos)
+
+	if fields.submit then
+		meta:set_string ("channel", fields.channel)
+	end
+end
+
+
+
+local function on_blast (pos, intensity)
+	local meta = minetest.get_meta (pos)
+
+	if meta then
+		if intensity >= 1.0 then
+
+			clear_map (pos)
+
+			minetest.remove_node (pos)
+
+		else -- intensity < 1.0
+
+			clear_map (pos)
+
+			local node = minetest.get_node_or_nil (pos)
+			if node then
+				local items = minetest.get_node_drops (node, nil)
+
+				if items and #items > 0 then
+					local stack = ItemStack (items[1])
+
+					if stack then
+						preserve_metadata (pos, node, meta, { stack })
+						utils.item_drop (stack, nil, pos)
+						minetest.remove_node (pos)
+					end
+				end
+			end
+		end
+	end
+end
+
+
+
+local function can_dig (pos, player)
+	if not utils.can_interact_with_node (pos, player) then
+		return false
+	end
+
+	return true
+end
+
+
+
+local function on_rightclick (pos, node, clicker, itemstack, pointed_thing)
+	if not utils.can_interact_with_node (pos, clicker) then
+		if clicker and clicker:is_player () then
+			local owner = "<unknown>"
+			local meta = minetest.get_meta (pos)
+
+			if meta then
+				owner = meta:get_string ("owner")
+			end
+
+			local spec =
+			"formspec_version[3]"..
+			"size[8.0,4.0,false]"..
+			"label[1.0,1.0;Owned by "..minetest.formspec_escape (owner).."]"..
+			"button_exit[3.0,2.0;2.0,1.0;close;Close]"
+
+			minetest.show_formspec (clicker:get_player_name (),
+											"lwcomponents:component_privately_owned",
+											spec)
+		end
+	end
+
+	return itemstack
+end
+
+
+
+local function digilines_support ()
+	if utils.digilines_supported then
+		return
+		{
+			wire =
+			{
+				rules = utils.digilines_default_rules,
+			},
+
+			effector =
+			{
+				action = function (pos, node, channel, msg)
+					local meta = minetest.get_meta(pos)
+
+					if meta then
+						local this_channel = meta:get_string ("channel")
+
+						if this_channel ~= "" and this_channel == channel then
+							if type (msg) == "string" then
+								local m = { }
+								for w in string.gmatch(msg, "[^%s]+") do
+									m[#m + 1] = w
+								end
+
+								if m[1] == "clear" then
+									clear_map (pos)
+								end
+
+							elseif type (msg) == "table" then
+								draw_map (pos, msg)
+
+							end
+						end
+					end
+				end,
+			}
+		}
+	end
+
+	return nil
+end
+
+
+
+minetest.register_node("lwcomponents:hologram", {
+	description = S("Hologram"),
+	tiles = { "lwhologram.png", "lwhologram.png", "lwhologram.png",
+				 "lwhologram.png", "lwhologram.png", "lwhologram_face.png"},
+	is_ground_content = false,
+	groups = { cracky = 3 },
+	sounds = default.node_sound_stone_defaults (),
+	paramtype = "light",
+	param1 = 0,
+	paramtype2 = "facedir",
+	param2 = 1,
+	floodable = false,
+	_digistuff_channelcopier_fieldname = "channel",
+
+	digiline = digilines_support (),
+
+	on_destruct = on_destruct,
+	after_place_node = after_place_node,
+	on_receive_fields = on_receive_fields,
+	on_blast = on_blast,
+	can_dig = can_dig,
+	on_rightclick = on_rightclick
+})
+
+
+
+minetest.register_node("lwcomponents:hologram_locked", {
+	description = S("Hologram (locked)"),
+	tiles = { "lwhologram.png", "lwhologram.png", "lwhologram.png",
+				 "lwhologram.png", "lwhologram.png", "lwhologram_face.png"},
+	is_ground_content = false,
+	groups = { cracky = 3 },
+	sounds = default.node_sound_stone_defaults (),
+	paramtype = "light",
+	param1 = 0,
+	paramtype2 = "facedir",
+	param2 = 1,
+	floodable = false,
+	_digistuff_channelcopier_fieldname = "channel",
+
+	digiline = digilines_support (),
+
+	on_destruct = on_destruct,
+	after_place_node = after_place_node_locked,
+	on_receive_fields = on_receive_fields,
+	on_blast = on_blast,
+	can_dig = can_dig,
+	on_rightclick = on_rightclick
+})
+
+
+
+local function register_hologram_block (block)
+	local bc = hologram_block[block]
+
+	minetest.register_node(bc.node, {
+		description = S("Hologram "..block),
+		tiles = { bc.image },
+		drawtype = "glasslike",
+		light_source = 7,
+		use_texture_alpha = "blend",
+		sunlight_propagates = true,
+		walkable = false,
+		pointable = false,
+		diggable = false,
+		climbable = false,
+		buildable_to = true,
+		floodable = true,
+		is_ground_content = false,
+		groups = { not_in_creative_inventory = 1 },
+		paramtype = "light",
+		param1 = 255,
+		post_effect_color = bc.color,
+	})
+end
+
+
+
+register_hologram_block ("black")
+register_hologram_block ("orange")
+register_hologram_block ("magenta")
+register_hologram_block ("sky")
+register_hologram_block ("yellow")
+register_hologram_block ("pink")
+register_hologram_block ("cyan")
+register_hologram_block ("gray")
+register_hologram_block ("silver")
+register_hologram_block ("red")
+register_hologram_block ("green")
+register_hologram_block ("blue")
+register_hologram_block ("brown")
+register_hologram_block ("lime")
+register_hologram_block ("purple")
+register_hologram_block ("white")
+
+
+
+end -- utils.digilines_supported

init.lua

@@ -1,4 +1,4 @@
-local version = "0.1.4"
+local version = "0.1.19"
 local mod_storage = minetest.get_mod_storage ()
 
 
@@ -15,7 +15,11 @@ end
 local utils = { }
 local modpath = minetest.get_modpath ("lwcomponents")
 
+loadfile (modpath.."/settings.lua") (utils)
 loadfile (modpath.."/utils.lua") (utils, mod_storage)
+loadfile (modpath.."/explode.lua") (utils)
+loadfile (modpath.."/api.lua") (utils)
+utils.connections = loadfile (modpath.."/connections.lua") ()
 loadfile (modpath.."/dropper.lua") (utils)
 loadfile (modpath.."/collector.lua") (utils)
 loadfile (modpath.."/dispenser.lua") (utils)
@@ -23,6 +27,16 @@ loadfile (modpath.."/detector.lua") (utils)
 loadfile (modpath.."/siren.lua") (utils)
 loadfile (modpath.."/puncher.lua") (utils)
 loadfile (modpath.."/player_button.lua") (utils)
+loadfile (modpath.."/hologram.lua") (utils)
+loadfile (modpath.."/breaker.lua") (utils)
+loadfile (modpath.."/deployer.lua") (utils)
+loadfile (modpath.."/fan.lua") (utils)
+loadfile (modpath.."/conduit.lua") (utils, mod_storage)
+loadfile (modpath.."/cannon.lua") (utils)
+loadfile (modpath.."/cannon_shell.lua") (utils)
+loadfile (modpath.."/pistons.lua") (utils)
+loadfile (modpath.."/through_wire.lua") (utils)
+loadfile (modpath.."/camera.lua") (utils)
 loadfile (modpath.."/extras.lua") (utils)
 loadfile (modpath.."/digiswitch.lua") (utils)
 loadfile (modpath.."/movefloor.lua") (utils)

license.txt

@@ -13,6 +13,8 @@ without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
 See the GNU Lesser General Public License for more details:
 https://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
 
+Mesecons through wire code was adapted from mesecons_receiver.
+
 
 
 lwsiren-buzz.ogg
@@ -64,8 +66,21 @@ Media license
 siren images derived from images from https://openclipart.org, which is
 public domain.
 
+fan images derived from images from https://openclipart.org, which is
+public domain.
+
+camera lens images derived from images from https://openclipart.org, which
+is public domain.
+
 player button images derived from mesecons button image.
 
+cannon firing and explosion sound from tnt (TumeniNodes/steveygos93),
+released under CC0 1.0 (originally from https://freesound.org/s/80401/)
+
+boom image from tnt, released under CC BY-SA 3.0.
+
+Piston images and sounds from mesecons_pistons, released under CC-BY-SA 3.0.
+
 All other media, or media not covered by a licence, is licensed
 Attribution-ShareAlike 3.0 Unported (CC BY-SA 3.0)
 

mod.conf

@@ -3,4 +3,4 @@ description = Various components for mesecons and digilines.
 title = LWComponents
 name = lwcomponents
 depends = default
-optional_depends = lwdrops, mesecons, digilines, unifieddyes, intllib, hopper, mobs, digistuff
+optional_depends = mesecons, digilines, unifieddyes, intllib, hopper, digistuff

models/lwcomponents_cannon_barrel.obj

@@ -0,0 +1,625 @@
+# Blender v2.82 (sub 7) OBJ File: 'canon.blend'
+# www.blender.org
+mtllib lwcomponents_cannon_barrel.mtl
+o Canon
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models/lwcomponents_shell.obj

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models/piston_normal_1.obj

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+f 18/68/18 17/69/18 21/70/18 23/71/18

models/piston_normal_2.obj

@@ -0,0 +1,143 @@
+# Blender v2.82 (sub 7) OBJ File: ''
+# www.blender.org
+mtllib piston_normal_2.mtl
+o cube.011
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models/piston_sticky_1.obj

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+# Blender v2.82 (sub 7) OBJ File: ''
+# www.blender.org
+mtllib piston_sticky_1.mtl
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models/piston_sticky_2.obj

@@ -0,0 +1,143 @@
+# Blender v2.82 (sub 7) OBJ File: ''
+# www.blender.org
+mtllib piston_sticky_2.mtl
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pistons.lua

@@ -0,0 +1,937 @@
+local utils = ...
+local S = utils.S
+
+
+
+if utils.digilines_supported or utils.mesecon_supported then
+
+
+
+local piston_interval = 0.2
+
+
+
+local function direction_vector (node)
+	local axis = math.floor (node.param2 / 4)
+	local rotate = node.param2 % 4
+	local vec = { x = 0, y = 0, z = 0 }
+
+	if rotate == 0 then
+		vec = { x = 0, y = 0, z = -1 }
+	elseif rotate == 1 then
+		vec = { x = -1, y = 0, z = 0 }
+	elseif rotate == 2 then
+		vec = { x = 0, y = 0, z = 1 }
+	elseif rotate == 3 then
+		vec = { x = 1, y = 0, z = 0 }
+	end
+
+	if axis == 1 then
+		vec = vector.rotate (vec, { x = math.pi / -2, y = 0, z = 0 })
+	elseif axis == 2 then
+		vec = vector.rotate (vec, { x = math.pi / 2, y = 0, z = 0 })
+	elseif axis == 3 then
+		vec = vector.rotate (vec, { x = 0, y = 0, z = math.pi / 2 })
+	elseif axis == 4 then
+		vec = vector.rotate (vec, { x = 0, y = 0, z = math.pi / -2 })
+	elseif axis == 5 then
+		vec = vector.rotate (vec, { x = math.pi, y = 0, z = 0 })
+	end
+
+	return vec
+end
+
+
+
+local function push_entities (pos, vec)
+	local tpos = vector.add (pos, vec)
+	local tnode = utils.get_far_node (tpos)
+	local can_move = false
+
+	if tnode then
+		if tnode.name == "air" then
+			can_move = true
+		else
+			local tdef = utils.find_item_def (tnode.name)
+
+			can_move = tdef and not tdef.walkable
+		end
+	end
+
+	if can_move then
+		local object = minetest.get_objects_inside_radius (pos, 1.5)
+
+		for j = 1, #object do
+			if object[j].get_pos then
+				local opos = object[j]:get_pos ()
+
+				if opos.x > (pos.x - 0.5) and opos.x < (pos.x + 0.5) and
+					opos.z > (pos.z - 0.5) and opos.z < (pos.z + 0.5) and
+					opos.y > (pos.y - 0.5) and opos.y < (pos.y + 0.5) then
+
+					object[j]:set_pos (vector.add (opos, vec))
+				end
+			end
+		end
+	end
+end
+
+
+
+local function push_nodes (pos, extent)
+	local node = utils.get_far_node (pos)
+
+	if node then
+		local vec = direction_vector (node)
+		local last = vector.add (pos, vector.multiply (vec, extent))
+		local maxnodes = utils.settings.max_piston_nodes + 1
+		local count = 0
+
+		for i = 1, maxnodes do
+			local tnode = utils.get_far_node (last)
+
+			if not tnode then
+				return false
+			end
+
+			local tdef = utils.find_item_def (tnode.name)
+
+			if tnode.name == "air" or (tdef and not tdef.walkable) then
+				count = i - 1
+				break
+			end
+
+			if i == maxnodes then
+				return false
+			end
+
+			last = vector.add (last, vec)
+		end
+
+		push_entities (last, vec)
+
+		for i = 1, count, 1 do
+			local cpos = vector.subtract (last, vec)
+			local cnode = utils.get_far_node (cpos)
+			local cmeta = minetest.get_meta (cpos)
+
+			if not cnode or not cmeta then
+				return false
+			end
+
+			local tmeta = cmeta:to_table ()
+
+			push_entities (cpos, vec)
+
+			minetest.remove_node (cpos)
+			minetest.set_node (last, cnode)
+
+			if tmeta then
+				cmeta = minetest.get_meta (last)
+
+				if not cmeta then
+					return false
+				end
+
+				cmeta:from_table (tmeta)
+			end
+
+			last = cpos
+		end
+	end
+
+	return true
+end
+
+
+
+local function pull_node (pos, extent)
+	local node = utils.get_far_node (pos)
+
+	if node then
+		local vec = direction_vector (node)
+		local cpos = vector.add (pos, vector.multiply (vec, extent))
+		local cnode = utils.get_far_node (cpos)
+		local cdef = cnode and utils.find_item_def (cnode.name)
+
+		if cnode and cnode.name ~= "air" and cdef and cdef.walkable then
+
+			local cmeta = minetest.get_meta (cpos)
+
+			if cmeta then
+				local tpos = vector.subtract (cpos, vec)
+				local tmeta = cmeta:to_table ()
+
+				minetest.remove_node (cpos)
+				minetest.set_node (tpos, cnode)
+
+				if tmeta then
+					cmeta = minetest.get_meta (tpos)
+
+					if cmeta then
+						cmeta:from_table (tmeta)
+					end
+				end
+			end
+		end
+	end
+end
+
+
+
+local function place_blank (pos, extent)
+	local node = utils.get_far_node (pos)
+
+	if node then
+		local vec = direction_vector (node)
+		local blank_pos = vector.add (pos, vector.multiply (vec, extent))
+		local blank_node = utils.get_far_node (blank_pos)
+		local blank_def = blank_node and utils.find_item_def (blank_node.name)
+
+		if blank_node and blank_node.name == "air" or
+			(blank_def and not blank_def.walkable) then
+
+			minetest.set_node (blank_pos,
+									 {
+										name = "lwcomponents:piston_blank_"..tostring (extent),
+										param2 = node.param2
+									 })
+		end
+	end
+end
+
+
+
+local function remove_blank (pos, extent)
+	local node = utils.get_far_node (pos)
+
+	if node then
+		local vec = direction_vector (node)
+		local blank_pos = vector.add (pos, vector.multiply (vec, extent))
+		local blank_node = utils.get_far_node (blank_pos)
+
+		if blank_node and
+			blank_node.name == "lwcomponents:piston_blank_"..tostring (extent) then
+
+			minetest.remove_node (blank_pos)
+		end
+	end
+end
+
+
+
+local function extend_piston (pos, extent)
+	local node = utils.get_far_node (pos)
+	local meta = minetest.get_meta (pos)
+
+	if node and meta then
+		extent = math.max (math.min (tonumber (extent or 2), meta:get_int ("max_extent")), 0)
+
+		if node.name == "lwcomponents:piston" then
+			if extent ~= 0 then
+				if push_nodes (pos, 1) then
+					node.name = "lwcomponents:piston_1"
+					minetest.swap_node (pos, node)
+					place_blank (pos, 1)
+					minetest.sound_play ("lwpiston_extend",
+												{
+													pos = pos,
+													max_hear_distance = 20,
+													gain = 0.3
+												},
+												true)
+
+					if extent == 2 then
+						meta:set_int ("extent", 2)
+						minetest.get_node_timer (pos):start (piston_interval)
+
+						return true
+					end
+				end
+			end
+
+		elseif node.name == "lwcomponents:piston_1" then
+			if extent == 0 then
+				remove_blank (pos, 1)
+				node.name = "lwcomponents:piston"
+				minetest.swap_node (pos, node)
+				minetest.sound_play ("lwpiston_retract",
+											{
+												pos = pos,
+												max_hear_distance = 20,
+												gain = 0.3
+											},
+											true)
+
+			elseif extent == 2 then
+				if push_nodes (pos, 2) then
+					node.name = "lwcomponents:piston_2"
+					minetest.swap_node (pos, node)
+					place_blank (pos, 2)
+					minetest.sound_play ("lwpiston_extend",
+												{
+													pos = pos,
+													max_hear_distance = 20,
+													gain = 0.3
+												},
+												true)
+				end
+			end
+
+		elseif node.name == "lwcomponents:piston_2" then
+			if extent ~= 2 then
+				remove_blank (pos, 2)
+				node.name = "lwcomponents:piston_1"
+				minetest.swap_node (pos, node)
+				minetest.sound_play ("lwpiston_retract",
+											{
+												pos = pos,
+												max_hear_distance = 20,
+												gain = 0.3
+											},
+											true)
+
+				if extent == 0 then
+					meta:set_int ("extent", 0)
+					minetest.get_node_timer (pos):start (piston_interval)
+
+					return true
+				end
+			end
+
+		elseif node.name == "lwcomponents:piston_sticky" then
+			if extent ~= 0 then
+				if push_nodes (pos, 1) then
+					node.name = "lwcomponents:piston_sticky_1"
+					minetest.swap_node (pos, node)
+					place_blank (pos, 1)
+					minetest.sound_play ("lwpiston_extend",
+												{
+													pos = pos,
+													max_hear_distance = 20,
+													gain = 0.3
+												},
+												true)
+
+					if extent == 2 then
+						meta:set_int ("extent", 2)
+						minetest.get_node_timer (pos):start (piston_interval)
+
+						return true
+					end
+				end
+			end
+
+
+		elseif node.name == "lwcomponents:piston_sticky_1" then
+			if extent == 0 then
+				remove_blank (pos, 1)
+				node.name = "lwcomponents:piston_sticky"
+				minetest.swap_node (pos, node)
+				pull_node (pos, 2)
+				minetest.sound_play ("lwpiston_retract",
+											{
+												pos = pos,
+												max_hear_distance = 20,
+												gain = 0.3
+											},
+											true)
+
+			elseif extent == 2 then
+				if push_nodes (pos, 2) then
+					node.name = "lwcomponents:piston_sticky_2"
+					minetest.swap_node (pos, node)
+					place_blank (pos, 2)
+					minetest.sound_play ("lwpiston_extend",
+												{
+													pos = pos,
+													max_hear_distance = 20,
+													gain = 0.3
+												},
+												true)
+				end
+			end
+
+		elseif node.name == "lwcomponents:piston_sticky_2" then
+			if extent ~= 2 then
+				remove_blank (pos, 2)
+				node.name = "lwcomponents:piston_sticky_1"
+				minetest.swap_node (pos, node)
+				pull_node (pos, 3)
+				minetest.sound_play ("lwpiston_retract",
+											{
+												pos = pos,
+												max_hear_distance = 20,
+												gain = 0.3
+											},
+											true)
+
+				if extent == 0 then
+					meta:set_int ("extent", 0)
+					minetest.get_node_timer (pos):start (piston_interval)
+
+					return true
+				end
+			end
+		end
+	end
+
+	return false
+end
+
+
+
+local function on_destruct_1 (pos)
+	remove_blank (pos, 1)
+end
+
+
+
+local function on_destruct_2 (pos)
+	remove_blank (pos, 2)
+	remove_blank (pos, 1)
+end
+
+
+
+local function on_place (itemstack, placer, pointed_thing)
+	local param2 = 0
+
+	if placer and placer:is_player () then
+		param2 = minetest.dir_to_facedir (placer:get_look_dir (), true)
+	elseif pointed_thing and pointed_thing.type == "node" then
+		param2 = minetest.dir_to_facedir (vector.subtract (pointed_thing.under, pointed_thing.above), true)
+	end
+
+	return minetest.item_place (itemstack, placer, pointed_thing, param2)
+end
+
+
+
+
+local function after_place_node (pos, placer, itemstack, pointed_thing)
+	local meta = minetest.get_meta (pos)
+	local spec =
+	"size[7,3.3]"..
+	"field[1,1;4,2;channel;Channel;${channel}]"..
+	"button_exit[4.6,1.15;1.5,1;submit;Set]"..
+	"checkbox[1,2;single;Single move;false]"
+
+	meta:set_string ("formspec", spec)
+	meta:set_int ("max_extent", 2)
+
+	-- If return true no item is taken from itemstack
+	return false
+end
+
+
+
+local function on_receive_fields (pos, formname, fields, sender)
+	if not utils.can_interact_with_node (pos, sender) then
+		return
+	end
+
+	local meta = minetest.get_meta (pos)
+
+	if meta then
+		if fields.submit then
+			meta:set_string ("channel", fields.channel)
+		end
+
+		if fields.single then
+			if fields.single == "true" then
+				local spec =
+				"size[7,3.3]"..
+				"field[1,1;4,2;channel;Channel;${channel}]"..
+				"button_exit[4.6,1.15;1.5,1;submit;Set]"..
+				"checkbox[1,2;single;Single move;true]"
+
+				meta:set_int ("max_extent", 1)
+				meta:set_string ("formspec", spec)
+			else
+				local spec =
+				"size[7,3.3]"..
+				"field[1,1;4,2;channel;Channel;${channel}]"..
+				"button_exit[4.6,1.15;1.5,1;submit;Set]"..
+				"checkbox[1,2;single;Single move;false]"
+
+				meta:set_int ("max_extent", 2)
+				meta:set_string ("formspec", spec)
+			end
+		end
+	end
+end
+
+
+
+local function on_blast (pos, intensity)
+	local meta = minetest.get_meta (pos)
+
+	if meta then
+		if intensity >= 1.0 then
+
+			minetest.remove_node (pos)
+
+		else -- intensity < 1.0
+
+			local node = minetest.get_node_or_nil (pos)
+			if node then
+				local items = minetest.get_node_drops (node, nil)
+
+				if items and #items > 0 then
+					local stack = ItemStack (items[1])
+
+					if stack then
+						preserve_metadata (pos, node, meta, { stack })
+						utils.item_drop (stack, nil, pos)
+						minetest.remove_node (pos)
+					end
+				end
+			end
+		end
+	end
+end
+
+
+
+local function can_dig (pos, player)
+	if not utils.can_interact_with_node (pos, player) then
+		return false
+	end
+
+	return true
+end
+
+
+
+local function on_rightclick (pos, node, clicker, itemstack, pointed_thing)
+	if not utils.can_interact_with_node (pos, clicker) then
+		if clicker and clicker:is_player () then
+			local owner = "<unknown>"
+			local meta = minetest.get_meta (pos)
+
+			if meta then
+				owner = meta:get_string ("owner")
+			end
+
+			local spec =
+			"formspec_version[3]"..
+			"size[8.0,4.0,false]"..
+			"label[1.0,1.0;Owned by "..minetest.formspec_escape (owner).."]"..
+			"button_exit[3.0,2.0;2.0,1.0;close;Close]"
+
+			minetest.show_formspec (clicker:get_player_name (),
+											"lwcomponents:component_privately_owned",
+											spec)
+		end
+	end
+
+	return itemstack
+end
+
+
+
+local function on_timer (pos, elapsed)
+	local meta = minetest.get_meta (pos)
+
+	if meta then
+		return extend_piston (pos, meta:get_int ("extent"))
+	end
+
+	return false
+end
+
+
+
+local function digilines_support ()
+	if utils.digilines_supported then
+		return
+		{
+			wire =
+			{
+				rules = utils.digilines_default_rules,
+			},
+
+			effector =
+			{
+				action = function (pos, node, channel, msg)
+					local meta = minetest.get_meta(pos)
+
+					if meta then
+						local this_channel = meta:get_string ("channel")
+
+						if this_channel ~= "" and this_channel == channel then
+							if type (msg) == "string" then
+								local m = { }
+								for w in string.gmatch(msg, "[^%s]+") do
+									m[#m + 1] = w
+								end
+
+								if m[1] == "extend" then
+									extend_piston (pos, m[2])
+
+								elseif m[1] == "retract" then
+									extend_piston (pos, 0)
+
+								elseif m[1] == "single" then
+									local spec =
+									"size[7,3.3]"..
+									"field[1,1;4,2;channel;Channel;${channel}]"..
+									"button_exit[4.6,1.15;1.5,1;submit;Set]"..
+									"checkbox[1,2;single;Single move;true]"
+
+									meta:set_int ("max_extent", 1)
+									meta:set_string ("formspec", spec)
+
+								elseif m[1] == "double" then
+									local spec =
+									"size[7,3.3]"..
+									"field[1,1;4,2;channel;Channel;${channel}]"..
+									"button_exit[4.6,1.15;1.5,1;submit;Set]"..
+									"checkbox[1,2;single;Single move;false]"
+
+									meta:set_int ("max_extent", 2)
+									meta:set_string ("formspec", spec)
+
+								end
+							end
+						end
+					end
+				end,
+			}
+		}
+	end
+
+	return nil
+end
+
+
+
+local function mesecon_support ()
+	if utils.mesecon_supported then
+		return
+		{
+			effector =
+			{
+				rules = utils.mesecon_default_rules,
+
+				action_on = function (pos, node)
+					-- do something to turn the effector on
+					extend_piston (pos, 2)
+				end,
+
+				action_off = function (pos, node)
+					-- do something to turn the effector off
+					extend_piston (pos, 0)
+				end,
+			}
+		}
+	end
+
+	return nil
+end
+
+
+
+minetest.register_node("lwcomponents:piston_blank_1", {
+	description = S("Piston blank"),
+	drawtype = "airlike",
+	light_source = 0,
+	sunlight_propagates = true,
+	walkable = false,
+	pointable = false,
+	diggable = false,
+	climbable = false,
+	buildable_to = false,
+	floodable = false,
+	is_ground_content = false,
+	drop = "",
+	groups = { not_in_creative_inventory = 1 },
+	paramtype = "light",
+	-- unaffected by explosions
+	on_blast = function() end,
+})
+
+
+
+minetest.register_node("lwcomponents:piston_blank_2", {
+	description = S("Piston blank"),
+	drawtype = "airlike",
+	paramtype = "none",
+	param1 = 0,
+	paramtype2 = "facedir",
+	param2 = 0,
+	collision_box = {
+		type = "fixed",
+		fixed = {
+			{-0.125, -0.125, -0.4, 0.125, 0.125, 0.4},
+			{-0.5, -0.5, -0.5, 0.5, 0.5, -0.3125},
+		},
+	},
+	light_source = 0,
+	sunlight_propagates = true,
+	walkable = true,
+	pointable = false,
+	diggable = false,
+	climbable = false,
+	buildable_to = false,
+	floodable = false,
+	is_ground_content = false,
+	drop = "",
+	groups = { not_in_creative_inventory = 1 },
+	paramtype = "light",
+	-- unaffected by explosions
+	on_blast = function() end,
+})
+
+
+
+minetest.register_node("lwcomponents:piston", {
+	description = S("Double Piston"),
+	tiles = { "lwcomponents_piston_top.png", "lwcomponents_piston_bottom.png",
+				 "lwcomponents_piston_right.png", "lwcomponents_piston_left.png",
+				 "lwcomponents_piston_base.png", "lwcomponents_piston_pusher.png" },
+	is_ground_content = false,
+	groups = { cracky = 3 },
+	sounds = default.node_sound_stone_defaults (),
+	paramtype = "none",
+	param1 = 0,
+	paramtype2 = "facedir",
+	param2 = 0,
+	floodable = false,
+	drop = "lwcomponents:piston",
+	_digistuff_channelcopier_fieldname = "channel",
+
+	mesecons = mesecon_support (),
+	digiline = digilines_support (),
+
+	on_place = on_place,
+	on_receive_fields = on_receive_fields,
+	can_dig = can_dig,
+	after_place_node = after_place_node,
+	on_blast = on_blast,
+	on_rightclick = on_rightclick,
+	on_timer = on_timer
+})
+
+
+
+minetest.register_node("lwcomponents:piston_1", {
+	description = S("Double Piston"),
+	drawtype = "mesh",
+	mesh = "piston_normal_1.obj",
+	tiles = { "lwcomponents_piston.png" },
+	visual_scale = 1.0,
+	selection_box = {
+		type = "fixed",
+		fixed = {
+			{-0.125, -0.125, -1.4, 0.125, 0.125, 0.4},
+			{-0.5, -0.5, -1.5, 0.5, 0.5, -1.3125},
+			{-0.5, -0.5, -0.3125, 0.5, 0.5, 0.5},
+		},
+	},
+	collision_box = {
+		type = "fixed",
+		fixed = {
+			{-0.125, -0.125, -1.4, 0.125, 0.125, 0.4},
+			{-0.5, -0.5, -1.5, 0.5, 0.5, -1.3125},
+			{-0.5, -0.5, -0.3125, 0.5, 0.5, 0.5},
+		},
+	},
+	is_ground_content = false,
+	groups = { cracky = 3 , not_in_creative_inventory = 1 },
+	sounds = default.node_sound_stone_defaults (),
+	paramtype = "none",
+	param1 = 0,
+	paramtype2 = "facedir",
+	param2 = 0,
+	floodable = false,
+	drop = "lwcomponents:piston",
+	_digistuff_channelcopier_fieldname = "channel",
+
+	mesecons = mesecon_support (),
+	digiline = digilines_support (),
+
+	on_destruct = on_destruct_1,
+	on_receive_fields = on_receive_fields,
+	can_dig = can_dig,
+	after_place_node = after_place_node,
+	on_blast = on_blast,
+	on_rightclick = on_rightclick,
+	on_timer = on_timer
+})
+
+
+
+minetest.register_node("lwcomponents:piston_2", {
+	description = S("Double Piston"),
+	drawtype = "mesh",
+	mesh = "piston_normal_2.obj",
+	tiles = { "lwcomponents_piston.png" },
+	visual_scale = 1.0,
+	selection_box = {
+		type = "fixed",
+		fixed = {
+			{-0.125, -0.125, -2.4, 0.125, 0.125, 0.4},
+			{-0.5, -0.5, -2.5, 0.5, 0.5, -2.3125},
+			{-0.5, -0.5, -0.3125, 0.5, 0.5, 0.5},
+		},
+	},
+	collision_box = {
+		type = "fixed",
+		fixed = {
+			{-0.125, -0.125, -2.4, 0.125, 0.125, 0.4},
+			{-0.5, -0.5, -2.5, 0.5, 0.5, -2.3125},
+			{-0.5, -0.5, -0.3125, 0.5, 0.5, 0.5},
+		},
+	},
+	is_ground_content = false,
+	groups = { cracky = 3 , not_in_creative_inventory = 1 },
+	sounds = default.node_sound_stone_defaults (),
+	paramtype = "none",
+	param1 = 0,
+	paramtype2 = "facedir",
+	param2 = 0,
+	floodable = false,
+	drop = "lwcomponents:piston",
+	_digistuff_channelcopier_fieldname = "channel",
+
+	mesecons = mesecon_support (),
+	digiline = digilines_support (),
+
+	on_destruct = on_destruct_2,
+	on_receive_fields = on_receive_fields,
+	can_dig = can_dig,
+	after_place_node = after_place_node,
+	on_blast = on_blast,
+	on_rightclick = on_rightclick,
+	on_timer = on_timer
+})
+
+
+
+minetest.register_node("lwcomponents:piston_sticky", {
+	description = S("Double Sticky Piston"),
+	tiles = { "lwcomponents_piston_top.png", "lwcomponents_piston_bottom.png",
+				 "lwcomponents_piston_right.png", "lwcomponents_piston_left.png",
+				 "lwcomponents_piston_base.png", "lwcomponents_piston_pusher_sticky.png" },
+	is_ground_content = false,
+	groups = { cracky = 3 },
+	sounds = default.node_sound_stone_defaults (),
+	paramtype = "none",
+	param1 = 0,
+	paramtype2 = "facedir",
+	param2 = 0,
+	floodable = false,
+	drop = "lwcomponents:piston_sticky",
+	_digistuff_channelcopier_fieldname = "channel",
+
+	mesecons = mesecon_support (),
+	digiline = digilines_support (),
+
+	on_place = on_place,
+	on_receive_fields = on_receive_fields,
+	can_dig = can_dig,
+	after_place_node = after_place_node,
+	on_blast = on_blast,
+	on_rightclick = on_rightclick,
+	on_timer = on_timer
+})
+
+
+
+minetest.register_node("lwcomponents:piston_sticky_1", {
+	description = S("Double Sticky Piston"),
+	drawtype = "mesh",
+	mesh = "piston_sticky_1.obj",
+	tiles = { "lwcomponents_piston.png" },
+	visual_scale = 1.0,
+	selection_box = {
+		type = "fixed",
+		fixed = {
+			{-0.125, -0.125, -1.4, 0.125, 0.125, 0.4},
+			{-0.5, -0.5, -1.5, 0.5, 0.5, -1.3125},
+			{-0.5, -0.5, -0.3125, 0.5, 0.5, 0.5},
+		},
+	},
+	collision_box = {
+		type = "fixed",
+		fixed = {
+			{-0.125, -0.125, -1.4, 0.125, 0.125, 0.4},
+			{-0.5, -0.5, -1.5, 0.5, 0.5, -1.3125},
+			{-0.5, -0.5, -0.3125, 0.5, 0.5, 0.5},
+		},
+	},
+	is_ground_content = false,
+	groups = { cracky = 3 , not_in_creative_inventory = 1 },
+	sounds = default.node_sound_stone_defaults (),
+	paramtype = "none",
+	param1 = 0,
+	paramtype2 = "facedir",
+	param2 = 0,
+	floodable = false,
+	drop = "lwcomponents:piston_sticky",
+	_digistuff_channelcopier_fieldname = "channel",
+
+	mesecons = mesecon_support (),
+	digiline = digilines_support (),
+
+	on_destruct = on_destruct_1,
+	on_receive_fields = on_receive_fields,
+	can_dig = can_dig,
+	after_place_node = after_place_node,
+	on_blast = on_blast,
+	on_rightclick = on_rightclick,
+	on_timer = on_timer
+})
+
+
+
+minetest.register_node("lwcomponents:piston_sticky_2", {
+	description = S("Double Sticky Piston"),
+	drawtype = "mesh",
+	mesh = "piston_sticky_2.obj",
+	tiles = { "lwcomponents_piston.png" },
+	visual_scale = 1.0,
+	selection_box = {
+		type = "fixed",
+		fixed = {
+			{-0.125, -0.125, -2.4, 0.125, 0.125, 0.4},
+			{-0.5, -0.5, -2.5, 0.5, 0.5, -2.3125},
+			{-0.5, -0.5, -0.3125, 0.5, 0.5, 0.5},
+		},
+	},
+	collision_box = {
+		type = "fixed",
+		fixed = {
+			{-0.125, -0.125, -2.4, 0.125, 0.125, 0.4},
+			{-0.5, -0.5, -2.5, 0.5, 0.5, -2.3125},
+			{-0.5, -0.5, -0.3125, 0.5, 0.5, 0.5},
+		},
+	},
+	is_ground_content = false,
+	groups = { cracky = 3 , not_in_creative_inventory = 1 },
+	sounds = default.node_sound_stone_defaults (),
+	paramtype = "none",
+	param1 = 0,
+	paramtype2 = "facedir",
+	param2 = 0,
+	floodable = false,
+	drop = "lwcomponents:piston_sticky",
+	_digistuff_channelcopier_fieldname = "channel",
+
+	mesecons = mesecon_support (),
+	digiline = digilines_support (),
+
+	on_destruct = on_destruct_2,
+	on_receive_fields = on_receive_fields,
+	can_dig = can_dig,
+	after_place_node = after_place_node,
+	on_blast = on_blast,
+	on_rightclick = on_rightclick,
+	on_timer = on_timer
+})
+
+
+
+end -- utils.digilines_supported or utils.mesecon_supported

player_button.lua

@@ -95,6 +95,7 @@ minetest.register_node ("lwcomponents:player_button", {
 	"lwplayer_button_side.png",
 	"lwplayer_button.png"
 	},
+	use_texture_alpha = "clip",
 	paramtype = "light",
 	paramtype2 = "facedir",
 	legacy_wallmounted = true,
@@ -143,6 +144,7 @@ minetest.register_node ("lwcomponents:player_button_off", {
 	"lwplayer_button_side.png",
 	"lwplayer_button.png"
 	},
+	use_texture_alpha = "clip",
 	paramtype = "light",
 	paramtype2 = "facedir",
 	legacy_wallmounted = true,
@@ -192,6 +194,7 @@ minetest.register_node ("lwcomponents:player_button_on", {
 	"lwplayer_button_side.png",
 	"lwplayer_button_on.png"
 	},
+	use_texture_alpha = "clip",
 	paramtype = "light",
 	paramtype2 = "facedir",
 	legacy_wallmounted = true,

puncher.lua

@@ -421,7 +421,9 @@ local function digilines_support ()
 					if meta then
 						local this_channel = meta:get_string ("channel")
 
-						if this_channel ~= "" and this_channel == channel then
+						if this_channel ~= "" and this_channel == channel and
+							type (msg) == "string" then
+
 							local m = { }
 							for w in string.gmatch(msg, "[^%s]+") do
 								m[#m + 1] = w

readme.txt

@@ -13,7 +13,7 @@ CC BY-SA 3.0
 
 Version
 =======
-0.1.4
+0.1.19
 
 
 Minetest Version
@@ -28,13 +28,11 @@ default
 
 Optional Dependencies
 =====================
-lwdrops
 mesecons
 digilines
 unifieddyes
 intllib
 hopper
-mobs
 digistuff
 
 
@@ -52,434 +50,54 @@ Description
 ===========
 Various components for mesecons and digilines.
 
-
-
-Dropper
--------
-* This block is only available if digilines and/or mesecons are loaded.
-
-Contains an inventory and drops an item on command. Also acts as a
-digilines conductor. If the hopper mod is loaded, will take items from the
-top and sides, and release them from the bottom.
-
-UI
-
-Channel - digilines channel of dropper.
-Top 16 slot inventory - storage of items to drop.
-Bottom 32 slot inventory - player's inventory.
-
-Mesecons
-	Drops the next item when power is turned on.
-
-Digilines messages
-
-"drop"
-	Drops the next item. No drop if dropper is empty.
-
-"drop <slot>"
-	Drops 1 item from the given slot (1 to 16). No drop if slot is empty.
-	eg. "drop 7"
-
-"drop <itemname>"
-	Drops 1 item of the given name. No drop if dropper does not contain the
-	item.
-	eg. "drop default:stone"
-
-When an item is dropped a digilines message is sent with the dropper's
-channel. The message is a table with the following keys:
-{
-	action = "drop",
-	name = "<itemname>", -- name of dropped item
-	slot = <slot> -- slot number the item was taken from (1 to 16).
-}
-
-
-
-Dispenser
----------
-* This block is only available if digilines and/or mesecons are loaded.
-
-Contains an inventory and dispenses (with velocity) an item on command.
-Also acts as a digilines conductor. If the hopper mod is loaded, will take
-items from the top and sides, and release them from the bottom.
-
-Dispensers support mobs mod if loaded. Will spawn the entity from an 'egg'
-if possible, or the 'egg' is dispensed. If a chicken egg is dispensed a
-10% chance a chicken is dispensed instead. If the spawned entity can be
-owned (or tamed) and the dispenser is owned the owner of the dispenser is
-set as the owner of the entity.
-
-UI
-
-Channel - digilines channel of dispenser.
-Top 16 slot inventory - storage of items to dispense.
-Bottom 32 slot inventory - player's inventory.
-
-Mesecons
-	Dispenses the next item when power is turned on.
-
-Digilines messages
-
-"dispense"
-	Dispenses the next item. No dispense if dispenser is empty.
-
-"dispense <slot>"
-	Dispenses 1 item from the given slot (1 to 16). No dispense if slot is
-	empty.
-	eg. "dispense 7"
-
-"dispense <itemname>"
-	Dispenses 1 item of the given name. No dispense if dispenser does not
-	contain the item.
-	eg. "dispense default:stone"
-
-When an item is dropped a digilines message is sent with the dropper's
-channel. The message is a table with the following keys:
-{
-	action = "dispense",
-	name = "<itemname>", -- name of dropped item
-	slot = <slot> -- slot number the item was taken from (1 to 16).
-}
-
-
-
-Collector
----------
-* This block is only available if digilines is loaded.
-
-Picks up dropped items in adjacent block, with optional filtering. Also
-acts as a digilines conductor. If the hopper mod is loaded, will take items
-from the top and sides, and release them from the bottom.
-
-UI
-
-Channel - digilines channel of collector.
-Left 16 slot inventory - storage of picked up items.
-Right 8 slot inventory - Filter list. Place what items should be picked
-	up in this list. Leave empty to pick up all.
-Bottom 32 slot inventory - player's inventory.
-
-Digilines messages
-
-"start"
-	Start the collector.
-
-"stop"
-	Stop the collector.
-
-When items are picked up a digilines message is sent with the collector's
-channel. The message is a table with the following keys:
-{
-	action = "collect",
-	name = "<itemname>", -- name of picked up items.
-	count = <count> -- number of the item picked up.
-}
-
-
-
-Detector
---------
-* This block is only available if digilines and/or mesecons are loaded.
-
-Detects items or entities within a given radius. Also acts as a
-digilines conductor.
-
-UI
-
-Channel - digilines channel of detector.
-Radius - block distance from detector to detect.
-Entities - if checked detects entities.
-Players - if checked detects players.
-Drops - if checked detects drops.
-Nodes - if checked detects nodes.
-
-mode:
-	All - detects to radius in all directions, including diagonal.
-	Forward - detects to radius directly in front of the detector (one block high).
-	Up - detects to radius directly above the detector (one block wide).
-	Down - detects to radius directly below the detector (one block wide).
-
-Mesecons
-	Mesecons power is turned on when something is detected, and turned off
-	when nothing is detected.
-
-Digilines messages
-
-"start"
-	Start the detector.
-
-"stop"
-	Stop the detector.
-
-"radius <n>"
-	Set radius of the detector. <n> should be a number from 1 to 5, and is
-	trimmed to this range.
-
-"entities <true|false>"
-	Set detection of entities on or off.
-
-"players <true|false>"
-	Set detection of players on or off.
-
-"drops <true|false>"
-	Set detection of drops on or off.
-
-"nodes <true|false>"
-	Set detection of nodes on or off.
-
-"mode all"
-"mode forward"
-"mode up"
-"mode down"
-	Set the detector's mode.
-
-When items or entities are detected a digilines message is sent with the
-detector's channel. A message is sent for each found item/entity. The
-message is a table with the following keys:
-{
-	action = "detect",
-	type = "<type>", -- will be "entity", "player", "drop" or "node"
-	name = "<name>",
-	label = "<label>",
-	pos = { x = n, y = n, z = n },
-	count = <count>,
-	hp = <number>,
-	height = <number>
-}
-
-type
-	Will be "entity", "player", "drop" or "node".
-
-name
-	For "entity" the registered entity name.
-	For "player" the player's name.
-	For "drop" the registered item name.
-	For "node" the registered item name.
-
-label
-	For "entity" the name tag text.
-	For "player" the player's name.
-	For "drop" the registered item name.
-	For "node" the registered item name.
-
-pos
-	The relative position of the detected item/entity from the detector,
-	facing the direction of the detector.
-	+x = right
-	-x = left
-	+z = forward
-	-z = behind
-	+y = above
-	-y = below
-
-count
-	The count of items for a "drop", or 1 for everything else.
-
-hp
-	Health points for players and entities. Zero for everything else.
-
-height
-	Height for players and entities. Zero for everything else. This is simply
-	the top position of the object's collision box.
-
-
-Siren
------
-* This block is only available if digilines and/or mesecons are loaded.
-
-Plays a sound repeatedly while active. Also acts as a digilines conductor.
-
-UI
-
-Channel - digilines channel of siren.
-Distance - block distance the sound can be heard (range 0 to 100).
-Volume - volume the sound is played.
-Sound - select Buzzer, Horn, Raid or Siren.
-
-Mesecons
-	Sound plays while mesecons power is applied.
-
-Digilines messages
-
-"start"
-	Start the siren (turn on).
-
-"stop"
-	Stop the siren (turn off).
-
-"distance <n>"
-	Set block distance the sound can be heard. <n> should be a number
-	from 1 to 100, and is trimmed to this range.
-
-"volume <n>"
-	Set the sound volume. <n> should be a number from 1 to 100, and is
-	trimmed to this range.
-
-"sound buzzer"
-"sound horn"
-"sound raid"
-"sound siren"
-	Set the sound of the siren.
-
-"siren on"
-	Activate the siren, if its on.
-
-"siren off"
-	deactivate the siren.
-
-
-
-Puncher
--------
-* This block is only available if digilines and/or mesecons are loaded.
-
-Punches players or entities within a given reach. Also acts as a
-digilines conductor.
-
-UI
-
-Channel - digilines channel of detector.
-Reach - block distance from puncher to punch.
-Entities - if checked punches entities.
-Players - if checked punches players.
-
-mode:
-	Forward - punches to reach extent directly in front of the puncher (one block high).
-	Up - detects to reach extent directly above the puncher (one block wide).
-	Down - detects to reach extent directly below the puncher (one block wide).
-
-Mesecons
-	Punches the next item when power is turned on.
-
-Digilines messages
-
-"start"
-	Start the puncher.
-
-"stop"
-	Stop the puncher.
-
-"reach <n>"
-	Set reach of the puncher. <n> should be a number from 1 to 5, and is
-	trimmed to this range.
-
-"entities <true|false>"
-	Set punching of entities on or off.
-
-"players <true|false>"
-	Set punching of players on or off.
-
-"mode forward"
-"mode up"
-"mode down"
-	Set the puncher's mode.
-
-"punch"
-	Action a single punch if the puncher is turned on.
-
-When a player or entity is punched a digilines message is sent with the
-puncher's channel. The message is a table with the following keys:
-{
-	action = "punch",
-	type = "<type>", -- will be "entity" or "player"
-	name = "<name>",
-	label = "<label>"
-}
-
-type
-	Will be "entity" or "player".
-
-name
-	For "entity" the registered entity name.
-	For "player" the player's name.
-
-label
-	For "entity" the name tag text.
-	For "player" the player's name.
-
-
-
-Player Button
--------------
-* This block is only available if both digilines and digistuff are loaded.
-
-When pressed sends a digilines message with the name of the player that
-pressed the button.
-
-The first time the button is right clicked a form opens to set the
-digilines channel. After that right click presses the button. The
-digilines cannot be changed after its set.
-
-When the button is pressed a digilines message is sent with the button's
-channel in the form:
-{
-	action = "player",
-	name = <player name>
-}
-
-
-
-DigiSwitch
-----------
-* This block is only available if both digilines and mesecons are loaded.
-
-Digiswitches act as both a digilines message target and a digilines cable,
-as well as a mesecons power source. They can be placed beside each other
-to form a bank, horizontally or vertically.
-
-Right click the digiswitch to give it a channel.
-
-Mesecon power can be delivered at 6 sides of the digiswitch, the adjacent
-4 in the (x, z), above and below. Around the connector on these sides are a
-colored border indicating the side. The sides are named "red", "green",
-"blue", "yellow", "white" and "black".
-
-The digilines message sent to the digiswitch dictates the action, "on" or
-"off". The action can be followed with the side to act upon, separated by
-a space. eg. "on white". If a side is stated only that side is acted upon.
-If the side is omitted (or is invalid) all 6 sides are acted upon. If the
-side name "switch" is give the power is supplied the same as a mesecons
-switch (all horizontal sides, one below, this height and one above).
-
-
-
-MoveFloor
----------
-* This block is only available if mesecons and mesecons_mvps is loaded.
-
-The MoveFloor block responds to a mesecons power source in the 4 horizontal
-directions. If the power source is one higher the MoveFloor moves up to
-that height. If the power source is one lower the MoveFloor moves down to
-that height. Powering an adjacent block has no effect. The power source
-should be turned off before another move or the MoveFloor will oscillate.
-
-Any horizontally adjoining MoveFloor acts as a single block (only one
-needs to be powered).
-
-The MoveFloor will move up to 3 blocks stacked on it.
-
-If using a DigiSwitch as the power source use the side name "switch" or
-the MoveFloor will not move.
-
-
-
-Solid Color Conductors
-----------------------
-* These blocks are only defined if mesecons and unifieddyes are loaded.
-
-Provides 2 blocks that can be colored the same as Solid Color Block (with
-the air brush) and is both a mesecons and digilines conductor.
-
-The Solid Color Conductor block conducts in the 'default' directions and
-the Solid Color Horizontal Conductor only conducts horizontally.
+*	Dropper, drops an item on command.
+*	Dispenser, dispenses (with velocity) an item on command.
+*	Collector, picks up dropped items in adjacent block, with optional filtering.
+*	Detector, detects items or entities within a given radius.
+*	Siren, plays a sound repeatedly while active.
+*	Puncher, punches players or entities within a given reach.
+*	Player button, sends digilines message with player name.
+*	Breaker, digs the nodes directly in front.
+*	Deployers, places the nodes directly in front.
+*	Hologram, projects a hologram above the hologram node.
+*	Fan, blows any entity, player or drop in front of the fan.
+*	Conduit, connected in a circuit to move items.
+*	Cannon, shoots an item on command with directional aiming (plus 3 shells).
+*	Double (optionally single) reach pistons and sticky pistons.
+*	Digiswitch, digilines controlled mesecons power.
+*	Movefloor, similar to vertical mesecons movestone.
+*	Camera, takes a representative image.
+*	Mesecons Through Wire, transmits through 1 to 2 solid blocks.
+*	Solid color conductor blocks, same as Solid Color Block but also mesecons
+	and digilines conductor.
+
+To spawn entities from dispensers and cannons include the
+lwcomponents_spawners mod.
+
+See the docs folder for details on each item.
 
 
 
 The following are also defined as variants of the original mod item, if
 the relevant mod is loaded.
-+	lwcomponents:touchscreen - digistuff:touchscreen as full sized node.
-+	lwcomponents:panel - digistuff:panel as full sized node.
+*	Touchscreen, full node variant of digistuff:touchscreen.
+*	Panel, full node variant of digistuff:panel.
 
 
 
+The mod supports the following settings:
+
+Spawn mobs
+	Allow dispensers and cannons to spawn mobs instead of spawners.
+	Default: true
+
+Alert handler errors
+	Issue errors when handler's of other mods fail.
+	Default: true
+
+Maximum piston nodes
+	Maximum nodes a piston can push.
+	Default: 15
+
+
 ------------------------------------------------------------------------

settings.lua

@@ -0,0 +1,17 @@
+local utils = ...
+
+
+utils.settings = { }
+
+utils.settings.spawn_mobs =
+	minetest.settings:get_bool ("lwcomponents_spawn_mobs", true)
+
+utils.settings.alert_handler_errors =
+	minetest.settings:get_bool ("lwcomponents_alert_handler_errors", true)
+
+utils.settings.max_piston_nodes =
+	tonumber(minetest.settings:get("lwcomponents_max_piston_nodes") or 15)
+
+
+
+--

settingtypes.txt

@@ -0,0 +1,8 @@
+# Allow dispensers and cannons to spawn mobs instead of spawners.
+lwcomponents_spawn_mobs (Spawn mobs) bool true
+
+# Issue errors when handler's of other mods fail.
+lwcomponents_alert_handler_errors (Alert handler errors) bool true
+
+# Maximum nodes a piston can push.
+lwcomponents_max_piston_nodes (Maximum piston nodes) int 15

siren.lua

@@ -269,7 +269,7 @@ local function after_place_node_locked (pos, placer, itemstack, pointed_thing)
 		local meta = minetest.get_meta (pos)
 
 		meta:set_string ("owner", placer:get_player_name ())
-		meta:set_string ("infotext", "Detector (owned by "..placer:get_player_name ()..")")
+		meta:set_string ("infotext", "Siren (owned by "..placer:get_player_name ()..")")
 	end
 
 	-- If return true no item is taken from itemstack
@@ -433,7 +433,9 @@ local function digilines_support ()
 					if meta then
 						local this_channel = meta:get_string ("channel")
 
-						if this_channel ~= "" and this_channel == channel then
+						if this_channel ~= "" and this_channel == channel and
+							type (msg) == "string" then
+
 							local m = { }
 							for w in string.gmatch(msg, "[^%s]+") do
 								m[#m + 1] = w