VoxeLibre/mods/ITEMS/REDSTONE/mesecons_button/init.lua

-- WALL BUTTON
-- A button that when pressed emits power for a short moment and then turns off again

local S = minetest.get_translator("mesecons_button")

local button_get_output_rules = mesecon.rules.wallmounted_get

local boxes_off = {
	type = "wallmounted",
	wall_side = { -8/16, -2/16, -4/16, -6/16, 2/16, 4/16 },
	wall_bottom = { -4/16, -8/16, -2/16, 4/16, -6/16, 2/16 },
	wall_top = { -4/16, 6/16, -2/16, 4/16, 8/16, 2/16 },
}
local boxes_on = {
	type = "wallmounted",
	wall_side = { -8/16, -2/16, -4/16, -7/16, 2/16, 4/16 },
	wall_bottom = { -4/16, -8/16, -2/16, 4/16, -7/16, 2/16 },
	wall_top = { -4/16, 7/16, -2/16, 4/16, 8/16, 2/16 },
}

-- Push the button
mesecon.push_button = function(pos, node)
	-- No-op if button is already pushed
	if mesecon.is_receptor_on(node) then
		return
	end
	local def = minetest.registered_nodes[node.name]
	minetest.set_node(pos, {name="mesecons_button:button_"..def._mcl_button_basename.."_on", param2=node.param2})
	mesecon.receptor_on(pos, button_get_output_rules(node))
	minetest.sound_play("mesecons_button_push", {pos=pos})
	local timer = minetest.get_node_timer(pos)
	timer:start(def._mcl_button_timer)
end

local on_button_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 idef = itemstack:get_definition()
	local itemstack, success = minetest.item_place_node(itemstack, placer, pointed_thing)

	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

local buttonuse = S("Use the button to push it.")

mesecon.register_button = function(basename, description, texture, recipeitem, sounds, plusgroups, button_timer, push_by_arrow, longdesc)
	local groups_off = table.copy(plusgroups)
	groups_off.attached_node=1
	groups_off.dig_by_water=1
	groups_off.destroy_by_lava_flow=1
	groups_off.dig_by_piston=1
	groups_off.button=1 -- button (off)

	local groups_on = table.copy(groups_off)
	groups_on.not_in_creative_inventory=1
	groups_on.button=2 -- button (on)

	if push_by_arrow then
		groups_off.button_push_by_arrow = 1
		groups_on.button_push_by_arrow = 1
	end

	minetest.register_node("mesecons_button:button_"..basename.."_off", {
		drawtype = "nodebox",
		tiles = {texture},
		wield_image = "mesecons_button_wield_mask.png^"..texture.."^mesecons_button_wield_mask.png^[makealpha:255,126,126",
		-- FIXME: Use proper 3D inventory image
		inventory_image = "mesecons_button_wield_mask.png^"..texture.."^mesecons_button_wield_mask.png^[makealpha:255,126,126",
		wield_scale = { x=1, y=1, z=1},
		paramtype = "light",
		paramtype2 = "wallmounted",
		is_ground_content = false,
		walkable = false,
		sunlight_propagates = true,
		node_box = boxes_off,
		groups = groups_off,
		description = description,
		_doc_items_longdesc = longdesc,
		_doc_items_usagehelp = buttonuse,
		on_place = on_button_place,
		node_placement_prediction = "",
		on_rightclick = function (pos, node)
			mesecon.push_button(pos, node)
		end,
		sounds = sounds,
		mesecons = {receptor = {
			state = mesecon.state.off,
			rules = button_get_output_rules,
		}},
		_mcl_button_basename = basename,
		_mcl_button_timer = button_timer,

		_mcl_blast_resistance = 2.5,
		_mcl_hardness = 0.5,
	})

	minetest.register_node("mesecons_button:button_"..basename.."_on", {
		drawtype = "nodebox",
		tiles = {texture},
		wield_image = "mesecons_button_wield_mask.png^"..texture.."^mesecons_button_wield_mask.png^[makealpha:255,126,126",
		wield_scale = { x=1, y=1, z=0.5},
		paramtype = "light",
		paramtype2 = "wallmounted",
		is_ground_content = false,
		walkable = false,
		sunlight_propagates = true,
		node_box = boxes_on,
		groups = groups_on,
		drop = 'mesecons_button:button_'..basename..'_off',
		_doc_items_create_entry = false,
		node_placement_prediction = "",
		sounds = sounds,
		mesecons = {receptor = {
			state = mesecon.state.on,
			rules = button_get_output_rules
		}},
		_mcl_button_basename = basename,
		_mcl_button_timer = button_timer,
		on_timer = function(pos, elapsed)
			local node = minetest.get_node(pos)
			if node.name=="mesecons_button:button_"..basename.."_on" then --has not been dug
				-- Is button pushable by arrow?
				if push_by_arrow then
					-- If there's an arrow stuck in the button, keep it pressed and check
					-- it again later.
					local objs = minetest.get_objects_inside_radius(pos, 1)
					for o=1, #objs do
						local entity = objs[o]:get_luaentity()
						if entity and entity.name == "mcl_bows:arrow_entity" then
							local timer = minetest.get_node_timer(pos)
							timer:start(button_timer)
							return
						end
					end
				end

				-- Normal operation: Un-press the button
				minetest.set_node(pos, {name="mesecons_button:button_"..basename.."_off",param2=node.param2})
				minetest.sound_play("mesecons_button_pop", {pos=pos})
				mesecon.receptor_off(pos, button_get_output_rules(node))
			end
		end,

		_mcl_blast_resistance = 2.5,
		_mcl_hardness = 0.5,
	})

	minetest.register_craft({
		output = "mesecons_button:button_"..basename.."_off",
		recipe = {{ recipeitem }},
	})
end

mesecon.register_button(
	"stone",
	S("Stone Button"),
	"default_stone.png",
	"mcl_core:stone",
	mcl_sounds.node_sound_stone_defaults(),
	{material_stone=1,handy=1,pickaxey=1},
	1,
	false,
	S("A stone button is a redstone component made out of stone which can be pushed to provide redstone power. When pushed, it powers adjacent redstone components for 1 second."))

local woods = {
	{ "wood", "mcl_core:wood", "default_wood.png", S("Oak Button") },
	{ "acaciawood", "mcl_core:acaciawood", "default_acacia_wood.png", S("Acacia Button") },
	{ "birchwood", "mcl_core:birchwood", "mcl_core_planks_birch.png", S("Birch Button") },
	{ "darkwood", "mcl_core:darkwood", "mcl_core_planks_big_oak.png", S("Dark Oak Button") },
	{ "sprucewood", "mcl_core:sprucewood", "mcl_core_planks_spruce.png", S("Spruce Button") },
	{ "junglewood", "mcl_core:junglewood", "default_junglewood.png", S("Jungle Button") },
}

for w=1, #woods do
	mesecon.register_button(
		woods[w][1],
		woods[w][4],
		woods[w][3],
		woods[w][2],
		mcl_sounds.node_sound_wood_defaults(),
		{material_wood=1,handy=1,axey=1},
		1.5,
		true,
		S("A wooden button is a redstone component made out of wood which can be pushed to provide redstone power. When pushed, it powers adjacent redstone components for 1.5 seconds. Wooden buttons may also be pushed by arrows."))

	minetest.register_craft({
		type = "fuel",
		recipe = "mesecons_button:button_"..woods[w][1].."_off",
		burntime = 5,
	})
end

-- Add entry aliases for the Help
if minetest.get_modpath("doc") then
	doc.add_entry_alias("nodes", "mesecons_button:button_wood_off", "nodes", "mesecons_button:button_wood_on")
	doc.add_entry_alias("nodes", "mesecons_button:button_stone_off", "nodes", "mesecons_button:button_stone_on")
end