blockgame/mods/bg_tree/node.lua

local modname = minetest.get_current_modname()

blockgame.register_node(modname .. ":log", {
	description = "Log",
	tiles = {
		modname .. "_log_top.png",
		modname .. "_log_top.png",
		modname .. "_log.png",
	},
	groups = {
		woody = 1,
	},
})
blockgame.register_node(modname .. ":log_alive", {
	description = "Living Log",
	tiles = {
		modname .. "_log_top_alive.png",
		modname .. "_log_top_alive.png",
		modname .. "_log_alive.png",
	},
	groups = {
		woody = 1,
		planty = 1,
	},
	drop = modname .. ":log",
})

blockgame.register_node(modname .. ":sapling", {
	description = "Growing Log",
	tiles = {
		modname .. "_log_top_alive.png",
		modname .. "_log_top_alive.png",
		modname .. "_log_alive.png",
	},
	groups = {
		woody = 1,
		planty = 1,
	},
	drop = modname .. ":log",
})

local function reg_leaves (name, desc, drop, groups)
	groups = groups or {}
	groups.planty = 1
	groups.air_flowable = 1
	blockgame.register_node(modname .. ":" .. name, {
		description = desc,
		drawtype = "glasslike",
		tiles = {
			modname .. "_" .. name .. ".png",
		},
		paramtype = "light",
		sunlight_propagates = true,
		groups = groups,
		drop = drop,
	})
end

reg_leaves("leaves", "Leaves")
reg_leaves("leaves_alive", "Growing Leaves", modname .. ":leaves")
reg_leaves("leaves_decomposing", "Decomposing Leaves")

blockgame.reg_simple_node("nut", "Nut", {
	woody = 1,
})

blockgame.reg_simple_node("root", "Root", {
	woody = 1,
})
blockgame.reg_simple_node("root_alive", "Growing Root", {
	woody = 1,
})