Add variant changer tool (WIP)

mods/lzr_tools/init.lua

@@ -2,6 +2,8 @@ local S = minetest.get_translator("lzr_tools")
 
 local instadig = { times = { [1] = 0, [2] = 0, [3] = 0}, uses=0, maxlevel=255}
 
+lzr_tools = {}
+
 -- Cheat tools and weapons
 
 
@@ -163,3 +165,176 @@ if minetest.settings:get_bool("lzr_debug", false) then
 	})
 
 end
+
+local variant_cycles = {
+	next_nodes = {},
+	prev_nodes = {},
+}
+lzr_tools.register_variant_cycle = function(cycle)
+	for c=1, #cycle do
+		local cn = c + 1
+		if cn > #cycle then
+			cn = 1
+		end
+		local cp = c - 1
+		if cp < 1 then
+			cp = #cycle
+		end
+		local node_self = cycle[c]
+		local node_next = cycle[cn]
+		local node_prev = cycle[cp]
+
+		if variant_cycles.next_nodes[node_self] or variant_cycles.prev_nodes[node_self] then
+			minetest.log("warning", "[lzr_tools] register_variant_cycle: Node '"..node_self.."' already was part of a variant cycle. Overwriting ...")
+		end
+		variant_cycles.next_nodes[node_self] = node_next
+		variant_cycles.prev_nodes[node_self] = node_prev
+	end
+end
+
+lzr_tools.register_variant_cycle({
+	"lzr_core:stone",
+	"lzr_core:stone_cracked",
+	"lzr_core:stone_block",
+	"lzr_core:stone_block_mossy",
+	"lzr_core:stone_brick_circular",
+	"lzr_core:stone_brick_circular_mossy",
+	"lzr_core:stone_brick",
+	"lzr_core:stone_brick_mossy",
+})
+lzr_tools.register_variant_cycle({
+	"lzr_decor:ocean_stone",
+	"lzr_decor:ocean_stone_cracked",
+	"lzr_decor:ocean_stone_block",
+	"lzr_decor:ocean_carved",
+	"lzr_decor:ocean_cobble",
+	"lzr_decor:ocean_bricks",
+	"lzr_decor:ocean_circular",
+})
+lzr_tools.register_variant_cycle({
+	"lzr_core:island_stone",
+	"lzr_core:island_stone_cracked",
+})
+lzr_tools.register_variant_cycle({
+	"lzr_core:cave_stone",
+	"lzr_core:cave_stone_cracked",
+})
+lzr_tools.register_variant_cycle({
+	"lzr_core:sand",
+	"lzr_core:seabed",
+})
+lzr_tools.register_variant_cycle({
+	"lzr_core:dirt",
+	"lzr_core:dirt_with_grass",
+	"lzr_core:dirt_with_jungle_litter",
+})
+lzr_tools.register_variant_cycle({
+	"lzr_core:tree",
+	"lzr_core:palm_tree",
+	"lzr_core:coconut_tree",
+})
+lzr_tools.register_variant_cycle({
+	"lzr_core:wood",
+	"lzr_core:wood_mossy",
+	"lzr_core:palm_wood",
+	"lzr_core:coconut_wood",
+})
+lzr_tools.register_variant_cycle({
+	"lzr_decor:blanket_table",
+	"lzr_decor:working_table",
+})
+lzr_tools.register_variant_cycle({
+	"lzr_core:sandstone",
+	"lzr_core:sandstone_block",
+	"lzr_core:sandstone_brick",
+})
+lzr_tools.register_variant_cycle({
+	"lzr_decor:cauldron",
+	"lzr_decor:cauldron_water",
+})
+lzr_tools.register_variant_cycle({
+	"lzr_decor:forge",
+	"lzr_decor:forge_lit",
+})
+lzr_tools.register_variant_cycle({
+	"lzr_decor:cabinet",
+	"lzr_decor:cabinet_half",
+})
+lzr_tools.register_variant_cycle({
+	"lzr_decor:potted_dandelion_white",
+	"lzr_decor:potted_dandelion_yellow",
+	"lzr_decor:potted_tulip",
+	"lzr_decor:potted_rose",
+	"lzr_decor:potted_geranium",
+	"lzr_decor:potted_viola",
+})
+lzr_tools.register_variant_cycle({
+	"lzr_decor:empty_shelf",
+	"lzr_decor:bookshelf",
+	"lzr_decor:vessels_shelf",
+	"lzr_decor:multishelf",
+})
+lzr_tools.register_variant_cycle({
+	"lzr_decor:thatch",
+	"lzr_decor:thatch_wet",
+})
+lzr_tools.register_variant_cycle({
+	"lzr_laser:crate",
+	"lzr_laser:crate_mossy",
+})
+lzr_tools.register_variant_cycle({
+	"lzr_plants:island_grass",
+	"lzr_plants:crab_grass",
+})
+
+
+minetest.register_tool("lzr_tools:variant_changer", {
+	description = S("Block Variant Changer"),
+	_tt_help = S("Changes a block to different variant"),
+	inventory_image = "lzr_tools_variant_changer.png",
+	groups = { editor_tool = 1 },
+	on_use = function(itemstack, user, pointed_thing)
+		if pointed_thing.type ~= "node" then
+			return itemstack
+		end
+		if lzr_gamestate.get_state() ~= lzr_gamestate.EDITOR then
+			minetest.chat_send_player(user:get_player_name(), S("This tool only works in the level editor."))
+			return itemstack
+		end
+		local pos = pointed_thing.under
+		if minetest.is_protected(pos, user:get_player_name()) then
+			minetest.record_protection_violation(pos, user:get_player_name())
+			return itemstack
+		end
+		local node = minetest.get_node(pos)
+		local next_node = variant_cycles.next_nodes[node.name]
+		if next_node then
+			node.name = next_node
+			minetest.swap_node(pos, node)
+		end
+		return itemstack
+	end,
+	on_place = function(itemstack, user, pointed_thing)
+		if pointed_thing.type ~= "node" then
+			return itemstack
+		end
+		if lzr_gamestate.get_state() ~= lzr_gamestate.EDITOR then
+			minetest.chat_send_player(user:get_player_name(), S("This tool only works in the level editor."))
+			return itemstack
+		end
+		local pos = pointed_thing.under
+		if minetest.is_protected(pos, user:get_player_name()) then
+			minetest.record_protection_violation(pos, user:get_player_name())
+			return itemstack
+		end
+		local node = minetest.get_node(pos)
+		local prev_node = variant_cycles.prev_nodes[node.name]
+		if prev_node then
+			node.name = prev_node
+			minetest.swap_node(pos, node)
+		end
+		return itemstack
+	end,
+})
+
+