From dfc0d52372307bbfa4b29837ab8287aa8f0f346f Mon Sep 17 00:00:00 2001
From: Wuzzy <almikes@aol.com>
Date: Mon, 8 Jan 2018 17:45:30 +0100
Subject: [PATCH] Implement correct lever orientations

---
 .../REDSTONE/mesecons_walllever/init.lua      | 108 ++++++++++++++++--
 1 file changed, 99 insertions(+), 9 deletions(-)

diff --git a/mods/ITEMS/REDSTONE/mesecons_walllever/init.lua b/mods/ITEMS/REDSTONE/mesecons_walllever/init.lua
index e93b4f011b..9ac9e98817 100644
--- a/mods/ITEMS/REDSTONE/mesecons_walllever/init.lua
+++ b/mods/ITEMS/REDSTONE/mesecons_walllever/init.lua
@@ -1,6 +1,19 @@
--- WALL LEVER
--- Basically a switch that can be attached to a wall
--- Powers the block 2 nodes behind (using a receiver)
+local lever_get_output_rules = function(node)
+	local 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},
+	}
+	local dir = minetest.facedir_to_dir(node.param2)
+	dir = vector.multiply(dir, 2)
+	table.insert(rules, dir)
+	return rules
+end
+
+-- LEVER
 minetest.register_node("mesecons_walllever:wall_lever_off", {
 	drawtype = "mesh",
 	tiles = {
@@ -24,15 +37,91 @@ minetest.register_node("mesecons_walllever:wall_lever_off", {
 	_doc_items_longdesc = "A lever is a redstone component which can be flipped on and off. It supplies redstone power to the blocks behind while it is in the “on” state.",
 	_doc_items_usagehelp = "Right-click the lever to flip it on or off.",
 	on_rightclick = function (pos, node)
-		mesecon:swap_node(pos, "mesecons_walllever:wall_lever_on")
-		mesecon:receptor_on(pos, mesecon.rules.buttonlike_get(node))
+		minetest.swap_node(pos, {name="mesecons_walllever:wall_lever_on",param2=node.param2})
+		mesecon:receptor_on(pos, lever_get_output_rules(node))
 		minetest.sound_play("mesecons_lever", {pos=pos})
 	end,
+	node_placement_prediction = "",
+	on_place = function(itemstack, placer, pointed_thing)
+		if pointed_thing.type ~= "node" then
+			-- no interaction possible with entities
+			return itemstack
+		end
+
+		local under = pointed_thing.under
+		local node = minetest.get_node(under)
+		local def = minetest.registered_nodes[node.name]
+		if not def then return end
+		local groups = def.groups
+
+		-- Check special rightclick action of pointed node
+		if def and def.on_rightclick then
+			if not placer:get_player_control().sneak then
+				return def.on_rightclick(under, node, placer, itemstack,
+					pointed_thing) or itemstack, false
+			end
+		end
+
+		-- If the pointed node is buildable, let's look at the node *behind* that node
+		if def.buildable_to then
+			local dir = vector.subtract(pointed_thing.above, pointed_thing.under)
+			local actual = vector.subtract(under, dir)
+			local actualnode = minetest.get_node(actual)
+			def = minetest.registered_nodes[actualnode.name]
+			groups = def.groups
+		end
+
+		-- Only allow placement on full-cube solid opaque nodes
+		if (not groups) or (not groups.solid) or (not groups.opaque) or (def.node_box and def.node_box.type ~= "regular") then
+			return itemstack
+		end
+
+		local above = pointed_thing.above
+		local dir = vector.subtract(above, under)
+		local wdir
+		local tau = math.pi*2
+		if dir.z == 1 then
+			wdir = 6
+		elseif dir.z == -1 then
+			wdir = 8
+		elseif dir.x == 1 then
+			wdir = 15
+		elseif dir.x == -1 then
+			wdir = 17
+		elseif dir.y ~= 0 then
+			local yaw = placer:get_look_horizontal()
+			if (yaw > tau/8 and yaw < (tau/8)*3) or (yaw < (tau/8)*7 and yaw > (tau/8)*5) then
+				if dir.y == -1 then
+					wdir = 23
+				else
+					wdir = 1
+				end
+			else
+				if dir.y == -1 then
+					wdir = 22
+				else
+					wdir = 2
+				end
+			end
+		end
+
+		local idef = itemstack:get_definition()
+		local itemstack, success = minetest.item_place_node(itemstack, placer, pointed_thing, wdir)
+
+		if success then
+			if idef.sounds and idef.sounds.place then
+				minetest.sound_play(idef.sounds.place, {pos=above, gain=1})
+			end
+		end
+		return itemstack
+	end,
+
 	sounds = mcl_sounds.node_sound_stone_defaults(),
 	mesecons = {receptor = {
-		rules = mesecon.rules.buttonlike_get,
+		rules = lever_get_output_rules,
 		state = mesecon.state.off
 	}},
+	on_rotate = false,
 	_mcl_blast_resistance = 2.5,
 	_mcl_hardness = 0.5,
 })
@@ -57,15 +146,16 @@ minetest.register_node("mesecons_walllever:wall_lever_on", {
 	description="Lever",
 	_doc_items_create_entry = false,
 	on_rightclick = function (pos, node)
-		mesecon:swap_node(pos, "mesecons_walllever:wall_lever_off")
-		mesecon:receptor_off(pos, mesecon.rules.buttonlike_get(node))
+		minetest.swap_node(pos, {name="mesecons_walllever:wall_lever_off", param2=node.param2})
+		mesecon:receptor_off(pos, lever_get_output_rules(node))
 		minetest.sound_play("mesecons_lever", {pos=pos})
 	end,
 	sounds = mcl_sounds.node_sound_stone_defaults(),
 	mesecons = {receptor = {
-		rules = mesecon.rules.buttonlike_get,
+		rules = lever_get_output_rules,
 		state = mesecon.state.on
 	}},
+	on_rotate = false,
 	_mcl_blast_resistance = 2.5,
 	_mcl_hardness = 0.5,
 })