pipeworks/tubes/pane_embedded_tube.lua

local S = minetest.get_translator("pipeworks")

local straight = function(pos, node, velocity, stack) return {velocity} end

local pane_box = {
	type = "fixed",
	fixed = {
		{ -9/64, -9/64, -8/16, 9/64, 9/64, 8/16 }, -- tube
		{ -8/16, -8/16, -1/16, 8/16, 8/16, 1/16 } -- pane
	}
}

local texture_alpha_mode = minetest.features.use_texture_alpha_string_modes
	and "clip" or true

minetest.register_node("pipeworks:steel_pane_embedded_tube", {
	drawtype = "nodebox",
	description = S("Airtight panel embedded tube"),
	tiles = {
		pipeworks.make_tube_tile("pipeworks_pane_embedded_tube_sides.png^[transformR90"),
		pipeworks.make_tube_tile("pipeworks_pane_embedded_tube_sides.png^[transformR90"),
		pipeworks.make_tube_tile("pipeworks_pane_embedded_tube_sides.png"),
		pipeworks.make_tube_tile("pipeworks_pane_embedded_tube_sides.png"),
		pipeworks.make_tube_tile("pipeworks_pane_embedded_tube_ends.png"),
		pipeworks.make_tube_tile("pipeworks_pane_embedded_tube_ends.png"),
	},
	use_texture_alpha = texture_alpha_mode,
	node_box = pane_box,
	selection_box = pane_box,
	collision_box = pane_box,
	paramtype = "light",
	paramtype2 = "facedir",
	groups = {cracky=1, oddly_breakable_by_hand = 1, tubedevice = 1, dig_glass = 2, pickaxey=1, handy=1},
	_mcl_hardness=0.8,
	legacy_facedir_simple = true,
	_sound_def = {
        key = "node_sound_stone_defaults",
    },
	tube = {
		connect_sides = {front = 1, back = 1,},
		priority = 50,
		can_go = straight,
		can_insert = function(pos, node, stack, direction)
			local dir = minetest.facedir_to_dir(node.param2)
			return vector.equals(dir, direction) or vector.equals(vector.multiply(dir, -1), direction)
		end,
	},
	after_place_node = pipeworks.after_place,
	after_dig_node = pipeworks.after_dig,
	on_rotate = pipeworks.on_rotate,
})
pipeworks.ui_cat_tube_list[#pipeworks.ui_cat_tube_list+1] = "pipeworks:steel_pane_embedded_tube"