From a2f59a0b6d1324cc05f6b9466566e0af3dc239dc Mon Sep 17 00:00:00 2001
From: paly2 <plangrognet@laposte.net>
Date: Sat, 19 Dec 2015 11:57:24 +0100
Subject: [PATCH] Add the "conductor signal changer" node

---
 .../depends.txt                               |   1 +
 moremesecons_conductor_signalchanger/init.lua |  81 ++++++++++++++++++
 ...remesecons_conductor_signalchanger_off.png | Bin 0 -> 190 bytes
 ...oremesecons_conductor_signalchanger_on.png | Bin 0 -> 187 bytes
 4 files changed, 82 insertions(+)
 create mode 100644 moremesecons_conductor_signalchanger/depends.txt
 create mode 100644 moremesecons_conductor_signalchanger/init.lua
 create mode 100644 moremesecons_conductor_signalchanger/textures/moremesecons_conductor_signalchanger_off.png
 create mode 100644 moremesecons_conductor_signalchanger/textures/moremesecons_conductor_signalchanger_on.png

diff --git a/moremesecons_conductor_signalchanger/depends.txt b/moremesecons_conductor_signalchanger/depends.txt
new file mode 100644
index 0000000..acaa924
--- /dev/null
+++ b/moremesecons_conductor_signalchanger/depends.txt
@@ -0,0 +1 @@
+mesecons
diff --git a/moremesecons_conductor_signalchanger/init.lua b/moremesecons_conductor_signalchanger/init.lua
new file mode 100644
index 0000000..6cade6f
--- /dev/null
+++ b/moremesecons_conductor_signalchanger/init.lua
@@ -0,0 +1,81 @@
+local nodebox = {
+	type = "fixed",
+	fixed = {{-8/16, -8/16, -8/16, 8/16, -7/16, 8/16 }},
+}
+
+local function signalchanger_get_output_rules(node)
+	local rules = {{x=1, y=0, z=0}}
+	for i = 0, node.param2 do
+		rules = mesecon.rotate_rules_left(rules)
+	end
+	return rules
+end
+
+local function signalchanger_get_input_rules(node)
+	local rules = {{x=0, y=0, z=1, name="input_on"}, {x=0, y=0, z=-1, name="input_off"}, {x=-1, y=0, z=0, name="input_signal"}}
+	for i = 0, node.param2 do
+		rules = mesecon.rotate_rules_left(rules)
+	end
+	return rules
+end
+
+local update = function(pos, node, link, newstate)
+	local meta = minetest.get_meta(pos)
+	meta:set_int(link.name, newstate == "on" and 1 or 0)
+	local input_on = meta:get_int("input_on") == 1
+	local input_off = meta:get_int("input_off") == 1
+	local input_signal = meta:get_int("input_signal") == 1
+	
+	if input_on then
+		minetest.swap_node(pos, {name = "moremesecons_conductor_signalchanger:conductor_signalchanger_on", param2 = node.param2})
+	elseif input_off then
+		mesecon.receptor_off(pos, signalchanger_get_output_rules(node))
+		minetest.swap_node(pos, {name = "moremesecons_conductor_signalchanger:conductor_signalchanger_off", param2 = node.param2})
+	end
+	
+	if input_signal and minetest.get_node(pos).name == "moremesecons_conductor_signalchanger:conductor_signalchanger_on" then -- Note : we must use "minetest.get_node(pos)" and not "node" because the node may have been changed
+		mesecon.receptor_on(pos, signalchanger_get_output_rules(node))
+	else
+		mesecon.receptor_off(pos, signalchanger_get_output_rules(node))
+	end
+end
+
+mesecon.register_node("moremesecons_conductor_signalchanger:conductor_signalchanger", {
+	description = "Conductor Signal Changer",
+	inventory_image = "moremesecons_conductor_signalchanger_off.png",
+	groups = {dig_immediate = 2},
+	paramtype = "light",
+	paramtype2 = "facedir",
+	drawtype = "nodebox",
+	selection_box = nodebox,
+	node_box = nodebox,
+},{
+	groups = {dig_immediate = 2},
+	mesecons = {
+		receptor = {
+			rules = signalchanger_get_output_rules
+		},
+		effector = {
+			rules = signalchanger_get_input_rules,
+			action_change = update
+		},
+	},
+	tiles = {"moremesecons_conductor_signalchanger_off.png"},
+},{
+	groups = {dig_immediate = 2, not_in_creative_inventory = 1},
+	mesecons = {
+		receptor = {
+			rules = signalchanger_get_output_rules,
+		},
+		effector = {
+			rules = signalchanger_get_input_rules,
+			action_change = update,
+		},
+	},
+	tiles = {"moremesecons_conductor_signalchanger_on.png"},
+})
+
+minetest.register_craft({
+	output = "moremesecons_conductor_signalchanger:conductor_signalchanger_off",
+	recipe = {{"group:mesecon_conductor_craftable","moremesecons_signalchanger:signalchanger_off"}}
+})
diff --git a/moremesecons_conductor_signalchanger/textures/moremesecons_conductor_signalchanger_off.png b/moremesecons_conductor_signalchanger/textures/moremesecons_conductor_signalchanger_off.png
new file mode 100644
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diff --git a/moremesecons_conductor_signalchanger/textures/moremesecons_conductor_signalchanger_on.png b/moremesecons_conductor_signalchanger/textures/moremesecons_conductor_signalchanger_on.png
new file mode 100644
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