mesecons/mesecons_pistons/init.lua

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local specs = {
normal = {
offname = "mesecons_pistons:piston_normal_off",
onname = "mesecons_pistons:piston_normal_on",
pusher = "mesecons_pistons:piston_pusher_normal",
},
sticky = {
offname = "mesecons_pistons:piston_sticky_off",
onname = "mesecons_pistons:piston_sticky_on",
pusher = "mesecons_pistons:piston_pusher_sticky",
sticky = true,
},
}
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local function get_pistonspec_name(name, part)
if part then
for spec_name, spec in pairs(specs) do
if name == spec[part] then
return spec_name, part
end
end
return
end
for spec_name, spec in pairs(specs) do
for part, value in pairs(spec) do
if name == value then
return spec_name, part
end
end
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end
end
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local function get_pistonspec(name, part)
return specs[get_pistonspec_name(name, part)]
end
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local max_push = mesecon.setting("piston_max_push", 15)
local max_pull = mesecon.setting("piston_max_pull", 15)
-- Get mesecon rules of pistons
local function piston_get_rules(node)
local dir = minetest.facedir_to_dir(node.param2)
for k, v in pairs(dir) do
if v ~= 0 then
dir = {k, -v}
break
end
end
local rules = table.copy(mesecon.rules.default)
for i, rule in ipairs(rules) do
if rule[dir[1]] == dir[2] then
table.remove(rules, i)
end
end
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return rules
end
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local function piston_remove_pusher(pos, node)
local pistonspec = get_pistonspec(node.name, "onname")
local dir = vector.multiply(minetest.facedir_to_dir(node.param2), -1)
local pusherpos = vector.add(pos, dir)
local pushername = minetest.get_node(pusherpos).name
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-- make sure there actually is a pusher (for compatibility reasons mainly)
if pushername ~= pistonspec.pusher then
return
end
minetest.remove_node(pusherpos)
minetest.sound_play("piston_retract", {
pos = pos,
max_hear_distance = 20,
gain = 0.3,
})
minetest.check_for_falling(pusherpos)
end
local piston_on = function(pos, node)
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local pistonspec = get_pistonspec(node.name, "offname")
local dir = vector.multiply(minetest.facedir_to_dir(node.param2), -1)
local pusher_pos = vector.add(pos, dir)
local success, stack, oldstack = mesecon.mvps_push(pusher_pos, dir, max_push)
if not success then
return
end
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minetest.set_node(pos, {param2 = node.param2, name = pistonspec.onname})
minetest.set_node(pusher_pos, {param2 = node.param2, name = pistonspec.pusher})
minetest.sound_play("piston_extend", {
pos = pos,
max_hear_distance = 20,
gain = 0.3,
})
mesecon.mvps_process_stack(stack)
mesecon.mvps_move_objects(pusher_pos, dir, oldstack)
end
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local function piston_off(pos, node)
local pistonspec = get_pistonspec(node.name, "onname")
minetest.set_node(pos, {param2 = node.param2, name = pistonspec.offname})
piston_remove_pusher(pos, node)
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if not pistonspec.sticky then
return
end
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local dir = minetest.facedir_to_dir(node.param2)
local pullpos = vector.add(pos, vector.multiply(dir, -2))
local success, stack, oldstack = mesecon.mvps_pull_single(pullpos, dir, max_pull)
if success then
mesecon.mvps_move_objects(pullpos, vector.multiply(dir, -1), oldstack, -1)
end
end
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local orientations = {
[0] = { 4, 8},
{13, 17},
{10, 6},
{20, 15},
}
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local function piston_orientate(pos, placer)
if not placer then
return
end
local pitch = math.deg(placer:get_look_vertical())
local node = minetest.get_node(pos)
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if pitch > 55 then
node.param2 = orientations[node.param2][1]
elseif pitch < -55 then
node.param2 = orientations[node.param2][2]
else
return
end
minetest.swap_node(pos, node)
-- minetest.after, because on_placenode for unoriented piston must be processed first
minetest.after(0, mesecon.on_placenode, pos, node)
end
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local rotations = {
{0, 16, 20, 12},
{2, 14, 22, 18},
{1, 5, 23, 9},
{3, 11, 21, 7},
{4, 13, 10, 19},
{6, 15, 8, 17},
}
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local function get_rotation(param2)
for a = 1, #rotations do
for f = 1, #rotations[a] do
if rotations[a][f] == param2 then
return a, f
end
end
end
end
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local function rotate(param2, mode)
local axis, face = get_rotation(param2)
if mode == screwdriver.ROTATE_FACE then
face = face + 1
if face > 4 then
face = 1
end
elseif mode == screwdriver.ROTATE_AXIS then
axis = axis + 1
if axis > 6 then
axis = 1
end
face = 1
else
return param2
end
return rotations[axis][face]
end
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local function piston_rotate(pos, node, _, mode)
node.param2 = rotate(node.param2, mode)
minetest.swap_node(pos, node)
mesecon.execute_autoconnect_hooks_now(pos, node)
return true
end
local function piston_rotate_on(pos, node, player, mode)
local pistonspec = get_pistonspec(node.name, "onname")
local dir = vector.multiply(minetest.facedir_to_dir(node.param2), -1)
local pusher_pos = vector.add(dir, pos)
local pusher_node = minetest.get_node(pusher_pos)
if pusher_node.name ~= pistonspec.pusher then
return piston_rotate(pos, node, nil, mode)
end
if mode == screwdriver.ROTATE_FACE then
piston_rotate(pusher_pos, pusher_node, nil, mode)
return piston_rotate(pos, node, nil, mode)
elseif mode ~= screwdriver.ROTATE_AXIS then
return false
end
local player_name = player and player:is_player() and player:get_player_name() or ""
local ok, dir_after, pusher_pos_after
for i = 1, 5 do
node.param2 = rotate(node.param2, mode)
dir_after = vector.multiply(minetest.facedir_to_dir(node.param2), -1)
pusher_pos_after = vector.add(dir_after, pos)
local pusher_pos_after_node_name = minetest.get_node(pusher_pos_after).name
local pusher_pos_after_node_def = minetest.registered_nodes[pusher_pos_after_node_name]
if pusher_pos_after_node_def and pusher_pos_after_node_def.buildable_to and
not minetest.is_protected(pusher_pos_after, player_name) then
ok = true
break
end
end
if not ok then
return false
end
pusher_node.param2 = node.param2
minetest.remove_node(pusher_pos)
minetest.set_node(pusher_pos_after, pusher_node)
minetest.swap_node(pos, node)
mesecon.execute_autoconnect_hooks_now(pos, node)
return true
end
local function piston_rotate_pusher(pos, node, player, mode)
local pistonspec = get_pistonspec(node.name, "pusher")
local piston_pos = vector.add(pos, minetest.facedir_to_dir(node.param2))
local piston_node = minetest.get_node(piston_pos)
if piston_node.name ~= pistonspec.onname then
minetest.remove_node(pos) -- Make it possible to remove alone pushers.
return false
end
return piston_rotate_on(piston_pos, piston_node, player, mode)
end
-- Boxes:
local pt = 3/16 -- pusher thickness
local piston_pusher_box = {
type = "fixed",
fixed = {
{-2/16, -2/16, -.5 + pt, 2/16, 2/16, .5 + pt},
{-.5 , -.5 , -.5 , .5 , .5 , -.5 + pt},
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},
}
local piston_on_box = {
type = "fixed",
fixed = {
{-.5, -.5, -.5 + pt, .5, .5, .5}
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},
}
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-- Normal (non-sticky) Pistons:
-- offstate
minetest.register_node("mesecons_pistons:piston_normal_off", {
description = "Piston",
tiles = {
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"mesecons_piston_top.png",
"mesecons_piston_bottom.png",
"mesecons_piston_left.png",
"mesecons_piston_right.png",
"mesecons_piston_back.png",
"mesecons_piston_pusher_front.png"
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},
groups = {cracky = 3},
paramtype2 = "facedir",
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is_ground_content = false,
after_place_node = piston_orientate,
sounds = default.node_sound_wood_defaults(),
mesecons = {effector={
action_on = piston_on,
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rules = piston_get_rules,
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}},
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on_rotate = piston_rotate,
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on_blast = mesecon.on_blastnode,
})
-- onstate
minetest.register_node("mesecons_pistons:piston_normal_on", {
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description = "Activated Piston Base",
drawtype = "nodebox",
tiles = {
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"mesecons_piston_top.png",
"mesecons_piston_bottom.png",
"mesecons_piston_left.png",
"mesecons_piston_right.png",
"mesecons_piston_back.png",
"mesecons_piston_on_front.png"
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},
groups = {cracky = 3, not_in_creative_inventory = 1},
paramtype = "light",
paramtype2 = "facedir",
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is_ground_content = false,
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drop = "mesecons_pistons:piston_normal_off",
after_dig_node = piston_remove_pusher,
node_box = piston_on_box,
selection_box = piston_on_box,
sounds = default.node_sound_wood_defaults(),
mesecons = {effector={
action_off = piston_off,
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rules = piston_get_rules,
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}},
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on_rotate = piston_rotate_on,
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on_blast = mesecon.on_blastnode,
})
-- pusher
minetest.register_node("mesecons_pistons:piston_pusher_normal", {
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description = "Piston Pusher",
drawtype = "nodebox",
tiles = {
"mesecons_piston_pusher_top.png",
"mesecons_piston_pusher_bottom.png",
"mesecons_piston_pusher_left.png",
"mesecons_piston_pusher_right.png",
"mesecons_piston_pusher_back.png",
"mesecons_piston_pusher_front.png"
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},
groups = {not_in_creative_inventory = 1},
paramtype = "light",
paramtype2 = "facedir",
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is_ground_content = false,
diggable = false,
selection_box = piston_pusher_box,
node_box = piston_pusher_box,
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on_rotate = piston_rotate_pusher,
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drop = "",
})
-- Sticky ones
-- offstate
minetest.register_node("mesecons_pistons:piston_sticky_off", {
description = "Sticky Piston",
tiles = {
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"mesecons_piston_top.png",
"mesecons_piston_bottom.png",
"mesecons_piston_left.png",
"mesecons_piston_right.png",
"mesecons_piston_back.png",
"mesecons_piston_pusher_front_sticky.png"
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},
groups = {cracky = 3},
paramtype2 = "facedir",
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is_ground_content = false,
after_place_node = piston_orientate,
sounds = default.node_sound_wood_defaults(),
mesecons = {effector={
action_on = piston_on,
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rules = piston_get_rules,
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}},
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on_rotate = piston_rotate,
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on_blast = mesecon.on_blastnode,
})
-- onstate
minetest.register_node("mesecons_pistons:piston_sticky_on", {
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description = "Activated Sticky Piston Base",
drawtype = "nodebox",
tiles = {
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"mesecons_piston_top.png",
"mesecons_piston_bottom.png",
"mesecons_piston_left.png",
"mesecons_piston_right.png",
"mesecons_piston_back.png",
"mesecons_piston_on_front.png"
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},
groups = {cracky = 3, not_in_creative_inventory = 1},
paramtype = "light",
paramtype2 = "facedir",
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is_ground_content = false,
drop = "mesecons_pistons:piston_sticky_off",
after_dig_node = piston_remove_pusher,
node_box = piston_on_box,
selection_box = piston_on_box,
sounds = default.node_sound_wood_defaults(),
mesecons = {effector={
action_off = piston_off,
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rules = piston_get_rules,
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}},
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on_rotate = piston_rotate_on,
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on_blast = mesecon.on_blastnode,
})
-- pusher
minetest.register_node("mesecons_pistons:piston_pusher_sticky", {
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description = "Sticky Piston Pusher",
drawtype = "nodebox",
tiles = {
"mesecons_piston_pusher_top.png",
"mesecons_piston_pusher_bottom.png",
"mesecons_piston_pusher_left.png",
"mesecons_piston_pusher_right.png",
"mesecons_piston_pusher_back.png",
"mesecons_piston_pusher_front_sticky.png"
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},
groups = {not_in_creative_inventory = 1},
paramtype = "light",
paramtype2 = "facedir",
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is_ground_content = false,
diggable = false,
selection_box = piston_pusher_box,
node_box = piston_pusher_box,
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on_rotate = piston_rotate_pusher,
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drop = "",
})
-- Register pushers as stoppers if they would be seperated from the piston
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local function piston_pusher_get_stopper(node, dir, stack, stackid)
if (stack[stackid + 1]
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and stack[stackid + 1].node.name == get_pistonspec(node.name, "pusher").onname
and stack[stackid + 1].node.param2 == node.param2)
or (stack[stackid - 1]
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and stack[stackid - 1].node.name == get_pistonspec(node.name, "pusher").onname
and stack[stackid - 1].node.param2 == node.param2) then
return false
end
return true
end
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local function piston_pusher_up_down_get_stopper(node, dir, stack, stackid)
if (stack[stackid + 1]
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and stack[stackid + 1].node.name == get_pistonspec(node.name, "pusher").onname)
or (stack[stackid - 1]
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and stack[stackid - 1].node.name == get_pistonspec(node.name, "pusher").onname) then
return false
end
return true
end
mesecon.register_mvps_stopper("mesecons_pistons:piston_pusher_normal", piston_pusher_get_stopper)
mesecon.register_mvps_stopper("mesecons_pistons:piston_pusher_sticky", piston_pusher_get_stopper)
-- Register pistons as stoppers if they would be seperated from the stopper
local piston_up_down_get_stopper = function (node, dir, stack, stackid)
if (stack[stackid + 1]
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and stack[stackid + 1].node.name == get_pistonspec(node.name, "onname").pusher)
or (stack[stackid - 1]
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and stack[stackid - 1].node.name == get_pistonspec(node.name, "onname").pusher) then
return false
end
return true
end
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local function piston_get_stopper(node, dir, stack, stackid)
local pistonspec = get_pistonspec(node.name, "onname")
local dir = vector.multiply(minetest.facedir_to_dir(node.param2), -1)
local pusherpos = vector.add(stack[stackid].pos, dir)
local pushernode = minetest.get_node(pusherpos)
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if pistonspec.pusher == pushernode.name then
for _, s in ipairs(stack) do
if vector.equals(s.pos, pusherpos) -- pusher is also to be pushed
and s.node.param2 == node.param2 then
return false
end
end
end
return true
end
mesecon.register_mvps_stopper("mesecons_pistons:piston_normal_on", piston_get_stopper)
mesecon.register_mvps_stopper("mesecons_pistons:piston_sticky_on", piston_get_stopper)
--craft recipes
minetest.register_craft({
output = "mesecons_pistons:piston_normal_off 2",
recipe = {
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{"group:wood", "group:wood", "group:wood"},
{"default:cobble", "default:steel_ingot", "default:cobble"},
{"default:cobble", "group:mesecon_conductor_craftable", "default:cobble"},
}
})
minetest.register_craft({
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output = "mesecons_pistons:piston_sticky_off",
recipe = {
{"mesecons_materials:glue"},
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{"mesecons_pistons:piston_normal_off"},
}
})
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-- load legacy code
dofile(minetest.get_modpath("mesecons_pistons")..DIR_DELIM.."legacy.lua")