techage/power/drive_axle.lua

--[[

	TechAge
	=======

	Copyright (C) 2019 Joachim Stolberg

	GPL v3
	See LICENSE.txt for more information
	
	TA2 Drive Axles for the Steam Engine

]]--

-- for lazy programmers
local P = minetest.string_to_pos
local M = minetest.get_meta
local S = techage.S

local Axle = tubelib2.Tube:new({
	dirs_to_check = {1,2,3,4,5,6},
	max_tube_length = 8, 
	show_infotext = false,
	tube_type = "axle",
	primary_node_names = {"techage:axle", "techage:axle_on"}, 
	secondary_node_names = {"techage:flywheel", "techage:flywheel_on", "techage:gearbox", "techage:gearbox_on"},
	after_place_tube = function(pos, param2, tube_type, num_tubes, state)
		if state == "on" then
			minetest.swap_node(pos, {name = "techage:axle_on", param2 = param2})
		else
			minetest.swap_node(pos, {name = "techage:axle", param2 = param2})
		end
	end,
})

Axle:register_on_tube_update(function(node, pos, out_dir, peer_pos, peer_in_dir)
	minetest.registered_nodes[node.name].after_tube_update(node, pos, out_dir, peer_pos, peer_in_dir)
end)

techage.Axle = Axle

minetest.register_node("techage:axle", {
	description = S("TA2 Drive Axle"),
	tiles = {
		"techage_axleR.png",
		"techage_axleR.png",
		"techage_axle.png",
		"techage_axle.png",
		"techage_axle_clutch.png",
		"techage_axle_clutch.png",
	},
	
	after_place_node = function(pos, placer, itemstack, pointed_thing)
		if not Axle:after_place_tube(pos, placer, pointed_thing) then
			minetest.remove_node(pos)
			return true
		end
		return false
	end,
	
	after_dig_node = function(pos, oldnode, oldmetadata, digger)
		Axle:after_dig_tube(pos, oldnode, oldmetadata)
	end,
	
	paramtype2 = "facedir", -- important!
	drawtype = "nodebox",
	node_box = {
		type = "fixed",
		fixed = {
			{-3/16, -3/16, -4/8,  3/16, 3/16, 4/8},
		},
	},
	on_rotate = screwdriver.disallow, -- important!
	paramtype = "light",
	sunlight_propagates = true,
	is_ground_content = false,
	groups = {crumbly = 3, cracky = 3, snappy = 3},
	sounds = default.node_sound_wood_defaults(),
})

minetest.register_node("techage:axle_on", {
	description = S("TA2 Drive Axle"),
	tiles = {
		{
			image = "techage_axle4R.png",
			backface_culling = false,
			animation = {
				type = "vertical_frames",
				aspect_w = 32,
				aspect_h = 32,
				length = 0.6,
			},
		},
		{
			image = "techage_axle4R.png",
			backface_culling = false,
			animation = {
				type = "vertical_frames",
				aspect_w = 32,
				aspect_h = 32,
				length = 0.6,
			},
		},
		{
			image = "techage_axle4.png",
			backface_culling = false,
			animation = {
				type = "vertical_frames",
				aspect_w = 32,
				aspect_h = 32,
				length = 0.6,
			},
		},
		{
			image = "techage_axle4.png",
			backface_culling = false,
			animation = {
				type = "vertical_frames",
				aspect_w = 32,
				aspect_h = 32,
				length = 0.6,
			},
		},
		{
			image = "techage_axle_clutch4.png",
			backface_culling = false,
			animation = {
				type = "vertical_frames",
				aspect_w = 32,
				aspect_h = 32,
				length = 0.6,
			},
		},
		{
			image = "techage_axle_clutch4.png",
			backface_culling = false,
			animation = {
				type = "vertical_frames",
				aspect_w = 32,
				aspect_h = 32,
				length = 0.6,
			},
		},
	},
	
	after_place_node = function(pos, placer, itemstack, pointed_thing)
		if not Axle:after_place_tube(pos, placer, pointed_thing) then
			minetest.remove_node(pos)
			return true
		end
		return false
	end,
	
	after_dig_node = function(pos, oldnode, oldmetadata, digger)
		Axle:after_dig_tube(pos, oldnode, oldmetadata)
	end,
	
	paramtype2 = "facedir", -- important!
	drawtype = "nodebox",
	node_box = {
		type = "fixed",
		fixed = {
			{-3/16, -3/16, -4/8,  3/16, 3/16, 4/8},
		},
	},
	on_rotate = screwdriver.disallow, -- important!
	paramtype = "light",
	sunlight_propagates = true,
	is_ground_content = false,
	diggable = false,
	groups = {not_in_creative_inventory = 1},
	sounds = default.node_sound_wood_defaults(),
})

minetest.register_craft({
	output = "techage:axle 3",
	recipe = {
		{"default:junglewood", "", "default:wood"},
		{"", "techage:iron_ingot", ""},
		{"default:wood", "", "default:junglewood"},
	},
})


-- Axles PNG animation
function techage.switch_axles(pos, on)
	local s = M(pos):get_string("power_dirs")
	if s ~= "" then
		for _,indir in ipairs(minetest.deserialize(s)) do
			local out_dir = tubelib2.Turn180Deg[indir]
			if on then
				Axle:switch_tube_line(pos, out_dir, "on")
			else
				Axle:switch_tube_line(pos, out_dir, "off")
			end
		end
	end
end