musttest_game/mods/default/corals.lua

local function coral_on_place(itemstack, placer, pointed_thing)
	if pointed_thing.type ~= "node" or not placer then
		return itemstack
	end

	local player_name = placer:get_player_name()
	local pos_under = pointed_thing.under
	local pos_above = pointed_thing.above
	local node_under = minetest.get_node(pos_under)
	local def_under = minetest.registered_nodes[node_under.name]

	if def_under and def_under.on_rightclick and not placer:get_player_control().sneak then
		return def_under.on_rightclick(pos_under, node_under, placer, itemstack, pointed_thing) or itemstack
	end

	local water_group = minetest.get_item_group(minetest.get_node(pos_above).name, "water")
	if node_under.name ~= "default:coral_skeleton" or water_group == 0 then
		return itemstack
	end

	if minetest.test_protection(pos_under, player_name) or minetest.test_protection(pos_above, player_name) then
		return itemstack
	end

	node_under.name = itemstack:get_name()
	minetest.set_node(pos_under, node_under)

	itemstack:take_item()
	return itemstack
end

minetest.register_node("default:coral_green", {
	description = "Green Coral",
	drawtype = "plantlike_rooted",
	waving = 1,
	paramtype = "light",
	tiles = {"default_coral_skeleton.png"},
	special_tiles = {{name = "default_coral_green.png", tileable_vertical = true}},
	inventory_image = "default_coral_green.png",
	wield_image = "default_coral_green.png",
	groups = utility.dig_groups("plant"),
	selection_box = {
		type = "fixed",
		fixed = {
				{-0.5, -0.5, -0.5, 0.5, 0.5, 0.5},
				{-4/16, 0.5, -4/16, 4/16, 1.5, 4/16},
		},
	},
	node_dig_prediction = "default:coral_skeleton",
	node_placement_prediction = "",
	sounds = default.node_sound_stone_defaults({
		dig = {name = "default_dig_snappy", gain = 0.2},
		dug = {name = "default_grass_footstep", gain = 0.25},
	}),

	on_place = coral_on_place,

	after_destruct  = function(pos, oldnode)
		minetest.set_node(pos, {name = "default:coral_skeleton"})
	end,
})

minetest.register_node("default:coral_pink", {
	description = "Pink Coral",
	drawtype = "plantlike_rooted",
	waving = 1,
	paramtype = "light",
	tiles = {"default_coral_skeleton.png"},
	special_tiles = {{name = "default_coral_pink.png", tileable_vertical = true}},
	inventory_image = "default_coral_pink.png",
	wield_image = "default_coral_pink.png",
	groups = utility.dig_groups("plant"),
	selection_box = {
		type = "fixed",
		fixed = {
				{-0.5, -0.5, -0.5, 0.5, 0.5, 0.5},
				{-4/16, 0.5, -4/16, 4/16, 1.5, 4/16},
		},
	},
	node_dig_prediction = "default:coral_skeleton",
	node_placement_prediction = "",
	sounds = default.node_sound_stone_defaults({
		dig = {name = "default_dig_snappy", gain = 0.2},
		dug = {name = "default_grass_footstep", gain = 0.25},
	}),

	on_place = coral_on_place,

	after_destruct  = function(pos, oldnode)
		minetest.set_node(pos, {name = "default:coral_skeleton"})
	end,
})

minetest.register_node("default:coral_cyan", {
	description = "Cyan Coral",
	drawtype = "plantlike_rooted",
	waving = 1,
	paramtype = "light",
	tiles = {"default_coral_skeleton.png"},
	special_tiles = {{name = "default_coral_cyan.png", tileable_vertical = true}},
	inventory_image = "default_coral_cyan.png",
	wield_image = "default_coral_cyan.png",
	groups = utility.dig_groups("plant"),
	selection_box = {
		type = "fixed",
		fixed = {
				{-0.5, -0.5, -0.5, 0.5, 0.5, 0.5},
				{-4/16, 0.5, -4/16, 4/16, 1.5, 4/16},
		},
	},
	node_dig_prediction = "default:coral_skeleton",
	node_placement_prediction = "",
	sounds = default.node_sound_stone_defaults({
		dig = {name = "default_dig_snappy", gain = 0.2},
		dug = {name = "default_grass_footstep", gain = 0.25},
	}),

	on_place = coral_on_place,

	after_destruct  = function(pos, oldnode)
		minetest.set_node(pos, {name = "default:coral_skeleton"})
	end,
})

minetest.register_node("default:coral_brown", {
	description = "Brown Coral",
	tiles = {"default_coral_brown.png"},
	groups = utility.dig_groups("cobble"),
	drop = "default:coral_skeleton",
	silverpick_drop = true,
	sounds = default.node_sound_stone_defaults(),
})

minetest.register_node("default:coral_orange", {
	description = "Orange Coral",
	tiles = {"default_coral_orange.png"},
	groups = utility.dig_groups("cobble"),
	drop = "default:coral_skeleton",
	silverpick_drop = true,
	sounds = default.node_sound_stone_defaults(),
})

minetest.register_node("default:coral_skeleton", {
	description = "Coral Skeleton",
	tiles = {"default_coral_skeleton.png"},
	groups = utility.dig_groups("cobble"),
	sounds = default.node_sound_stone_defaults(),
})