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digiswitch.lua

@@ -13,7 +13,7 @@ local function get_mesecon_rule_for_side (side)
 	if side == "white" then
 		return { { x = 0, y = 1, z = 0 } }
 	elseif side == "black" then
-		return { { x = 0, y = -1, z = 0 } } -- down doesn't work
+		return { { x = 0, y = -1, z = 0 } }
 	elseif side == "red" then
 		return { { x = -1, y = 0, z = 0 } }
 	elseif side == "green" then
@@ -32,13 +32,106 @@ local function get_mesecon_rule_for_side (side)
 			{ x =  0, y =  0, z =  1 },
 			{ x =  0, y =  0, z = -1 },
 			{ x =  0, y =  1, z =  0 },
-			{ x =  0, y = -1, z =  0 }, -- down doesn't work
+			{ x =  0, y = -1, z =  0 },
 		}
 	end
 end
 
 
 
+local side_bits =
+{
+	["white"]	= 0,
+	["black"]	= 1,
+	["red"]		= 2,
+	["green"]	= 3,
+	["blue"]		= 4,
+	["yellow"]	= 5
+}
+
+
+
+local function get_side_bit (side)
+	if side then
+		if side == "switch" then
+			return 64
+		end
+
+		local bit = side_bits[side]
+
+		if bit then
+			return math.pow (2, bit)
+		end
+	end
+
+	return 63
+end
+
+
+
+local function is_side_on (bits, side)
+	local bit = get_side_bit (side)
+
+	for i = 0, 6, 1 do
+		if (bit % 2) == 1 and (bits % 2) ~= 1 then
+			return false
+		end
+
+		bit = math.floor (bit / 2)
+		bits = math.floor (bits / 2)
+	end
+
+	return true
+end
+
+
+
+local function set_side_bit (bits, side, on)
+	local bit = get_side_bit (side)
+	local result = 0
+
+	for i = 0, 6, 1 do
+		if (bit % 2) == 1 then
+			if on then
+				result = result + math.pow (2, i)
+			end
+		elseif (bits % 2) == 1 then
+			result = result + math.pow (2, i)
+		end
+
+		bit = math.floor (bit / 2)
+		bits = math.floor (bits / 2)
+	end
+
+	return result
+end
+
+
+
+local function switch_on (pos, side)
+	utils.mesecon_receptor_on (pos, get_mesecon_rule_for_side (side))
+
+	local node = utils.get_far_node (pos)
+	if node then
+		node.param1 = set_side_bit (node.param1, side, true)
+		minetest.swap_node (pos, node)
+	end
+end
+
+
+
+local function switch_off (pos, side)
+	utils.mesecon_receptor_off (pos, get_mesecon_rule_for_side (side))
+
+	local node = utils.get_far_node (pos)
+	if node then
+		node.param1 = set_side_bit (node.param1, side, false)
+		minetest.swap_node (pos, node)
+	end
+end
+
+
+
 local function digilines_support ()
 	return
 	{
@@ -80,9 +173,9 @@ local function digilines_support ()
 							end
 
 							if words[1] == "on" then
-								utils.mesecon_receptor_on (pos, get_mesecon_rule_for_side (words[2]))
+								switch_on (pos, words[2])
 							elseif words[1] == "off" then
-								utils.mesecon_receptor_off (pos, get_mesecon_rule_for_side (words[2]))
+								switch_off (pos, words[2])
 							end
 						end
 					end
@@ -99,16 +192,32 @@ local function mesecon_support ()
 	{
 		receptor =
 		{
-			state = mesecon.state.off,
-			rules =
-			{
-				{ 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 }, -- down doesn't work
-			}
+			state = mesecon.state.on,
+
+			rules = function (node)
+				if is_side_on (node.param1, "switch") then
+					return utils.mesecon_default_rules
+				end
+
+				local r = { }
+				local sides =
+				{
+					"white",
+					"black",
+					"red",
+					"green",
+					"blue",
+					"yellow",
+				}
+
+				for _, side in ipairs (sides) do
+					if is_side_on (node.param1, side) then
+						r[#r + 1] = get_mesecon_rule_for_side (side)[1]
+					end
+				end
+
+				return r
+			end
 		},
 	}
 end
@@ -124,7 +233,7 @@ local function on_construct (pos)
 		local formspec =
 		"formspec_version[3]\n"..
 		"size[6.0,4.0]\n"..
-		"field[1.0,0.8;4.0,1.0;channel;Channel;]\n"..
+		"field[1.0,0.8;4.0,1.0;channel;Channel;${channel}]\n"..
 		"button_exit[2.0,2.5;2.0,1.0;set;Set]\n"
 
 		meta:set_string ("formspec", formspec)
@@ -145,14 +254,6 @@ local function on_receive_fields (pos, formname, fields, sender)
 
 		if meta then
 			meta:set_string ("channel", fields.channel or "")
-
-			local formspec =
-			"formspec_version[3]\n"..
-			"size[6.0,4.0]\n"..
-			"field[1.0,0.8;4.0,1.0;channel;Channel;"..minetest.formspec_escape (meta:get_string ("channel")).."]\n"..
-			"button_exit[2.0,2.5;2.0,1.0;set;Set]\n"
-
-			meta:set_string ("formspec", formspec)
 		end
 	end
 end
@@ -172,6 +273,8 @@ minetest.register_node ("lwcomponents:digiswitch", {
          {-0.5, -0.5, -0.5, 0.5, 0.5, 0.5},
       }
    },
+	paramtype = "none",
+	param1 = 0,
 	groups = { cracky = 2, oddly_breakable_by_hand = 2 },
 	sounds = default.node_sound_stone_defaults (),
 	mesecons = mesecon_support (),