Merge pull request 'Update trapdoor climbable behavior' (#3938) from Dehydrate6684/MineClone2:trapdoor-ladder into master

Reviewed-on: https://git.minetest.land/MineClone2/MineClone2/pulls/3938
Reviewed-by: the-real-herowl <the-real-herowl@noreply.git.minetest.land>

mods/ITEMS/mcl_core/nodes_climb.lua

@@ -11,9 +11,36 @@ local function rotate_climbable(pos, node, user, mode)
 	return false
 end
 
+---Updates the trapdoor above (if any).
+---
+---@param pos mt.Vector The position of the ladder.
+---@param event "place" | "destruct" The place or destruct event.
+function mcl_core.update_trapdoor(pos, event)
+	local top_pos = vector.offset(pos, 0, 1, 0)
+	local top_node = minetest.get_node_or_nil(top_pos)
+
+	if top_node and minetest.get_item_group(top_node.name, "trapdoor") == 2 then
+		local new_name = top_node.name
+		if event == "place" then
+			new_name = string.gsub(new_name, "open$", "ladder")
+		elseif event == "destruct" then
+			new_name = string.gsub(new_name, "ladder$", "open")
+		end
+
+		-- If node above is an opened trapdoor
+		minetest.swap_node(top_pos, {
+			name = new_name,
+			param1 = top_node.param1,
+			param2 = top_node.param2,
+		})
+	end
+end
+
+-- TODO: Move ladders into their own API.
 minetest.register_node("mcl_core:ladder", {
 	description = S("Ladder"),
-	_doc_items_longdesc = S("A piece of ladder which allows you to climb vertically. Ladders can only be placed on the side of solid blocks and not on glass, leaves, ice, slabs, glowstone, nor sea lanterns."),
+	_doc_items_longdesc = S(
+		"A piece of ladder which allows you to climb vertically. Ladders can only be placed on the side of solid blocks and not on glass, leaves, ice, slabs, glowstone, nor sea lanterns."),
 	drawtype = "signlike",
 	is_ground_content = false,
 	tiles = { "default_ladder.png" },
@@ -33,7 +60,14 @@ minetest.register_node("mcl_core:ladder", {
 		wall_side = { -0.5, -0.5, -0.5, -7 / 16, 0.5, 0.5 },
 	},
 	stack_max = 64,
-	groups = {handy=1,axey=1, attached_node=1, deco_block=1, dig_by_piston=1},
+	groups = {
+		handy = 1,
+		axey = 1,
+		attached_node = 1,
+		deco_block = 1,
+		dig_by_piston = 1,
+		ladder = 1
+	},
 	sounds = mcl_sounds.node_sound_wood_defaults(),
 	node_placement_prediction = "",
 	-- Restrict placement of ladders
@@ -80,7 +114,12 @@ minetest.register_node("mcl_core:ladder", {
 		end
 		return itemstack
 	end,
-
+	after_destruct = function(pos, old)
+		mcl_core.update_trapdoor(pos, "destruct")
+	end,
+	after_place_node = function(pos)
+		mcl_core.update_trapdoor(pos, "place")
+	end,
 	_mcl_blast_resistance = 0.4,
 	_mcl_hardness = 0.4,
 	on_rotate = rotate_climbable,
@@ -89,7 +128,8 @@ minetest.register_node("mcl_core:ladder", {
 
 minetest.register_node("mcl_core:vine", {
 	description = S("Vines"),
-	_doc_items_longdesc = S("Vines are climbable blocks which can be placed on the sides of solid full-cube blocks. Vines slowly grow and spread."),
+	_doc_items_longdesc = S(
+		"Vines are climbable blocks which can be placed on the sides of solid full-cube blocks. Vines slowly grow and spread."),
 	drawtype = "signlike",
 	tiles = { "mcl_core_vine.png" },
 	color = "#48B518",
@@ -107,9 +147,19 @@ minetest.register_node("mcl_core:vine", {
 	},
 	stack_max = 64,
 	groups = {
-		handy = 1, axey = 1, shearsy = 1, swordy = 1, deco_block = 1,
-		dig_by_piston = 1, destroy_by_lava_flow = 1, compostability = 50,
-		flammable = 2, fire_encouragement = 15, fire_flammability = 100, foliage_palette_wallmounted = 1
+		handy = 1,
+		axey = 1,
+		shearsy = 1,
+		swordy = 1,
+		deco_block = 1,
+		dig_by_piston = 1,
+		destroy_by_lava_flow = 1,
+		compostability = 50,
+		flammable = 2,
+		fire_encouragement = 15,
+		fire_flammability = 100,
+		foliage_palette_wallmounted = 1,
+		ladder = 1
 	},
 	sounds = mcl_sounds.node_sound_leaves_defaults(),
 	drop = "",
@@ -181,6 +231,12 @@ minetest.register_node("mcl_core:vine", {
 			minetest.registered_nodes[node.name].on_dig(below, node, digger)
 		end
 	end,
+	after_destruct = function(pos, old)
+		mcl_core.update_trapdoor(pos, "destruct")
+	end,
+	after_place_node = function(pos)
+		mcl_core.update_trapdoor(pos, "place")
+	end,
 
 
 	_mcl_blast_resistance = 0.2,

mods/ITEMS/mcl_doors/api_trapdoors.lua

@@ -72,7 +72,18 @@ function mcl_doors:register_trapdoor(name, def)
 			-- Open
 		else
 			minetest.sound_play(def.sound_open, { pos = pos, gain = 0.3, max_hear_distance = 16 }, true)
-			tmp_node = {name=name.."_open", param1=me.param1, param2=me.param2}
+
+			local bottom_node = minetest.get_node_or_nil(vector.offset(pos, 0, -1, 0))
+			local name_end = "_open"
+
+			-- Checking if there is something underneath the trapdoor
+			if bottom_node then
+				local is_ladder = minetest.get_item_group(bottom_node.name, "ladder")
+				if is_ladder > 0 then
+					name_end = "_ladder"
+				end
+			end
+			tmp_node = { name = name .. name_end, param1 = me.param1, param2 = me.param2 }
 		end
 		minetest.set_node(pos, tmp_node)
 	end
@@ -89,9 +100,11 @@ function mcl_doors:register_trapdoor(name, def)
 	longdesc = def._doc_items_longdesc
 	if not longdesc then
 		if def.only_redstone_can_open then
-			longdesc = S("Trapdoors are horizontal barriers which can be opened or closed and climbed like a ladder when open. They occupy the upper or lower part of a block, depending on how they have been placed. This trapdoor can only be opened or closed by redstone power.")
+			longdesc = S(
+				"Trapdoors are horizontal barriers which can be opened or closed and climbed like a ladder when open. They occupy the upper or lower part of a block, depending on how they have been placed. This trapdoor can only be opened or closed by redstone power.")
 		else
-			longdesc = S("Trapdoors are horizontal barriers which can be opened or closed and climbed like a ladder when open. They occupy the upper or lower part of a block, depending on how they have been placed. This trapdoor can be opened or closed by hand or redstone power.")
+			longdesc = S(
+				"Trapdoors are horizontal barriers which can be opened or closed and climbed like a ladder when open. They occupy the upper or lower part of a block, depending on how they have been placed. This trapdoor can be opened or closed by hand or redstone power.")
 		end
 	end
 	usagehelp = def._doc_items_usagehelp
@@ -128,7 +141,7 @@ function mcl_doors:register_trapdoor(name, def)
 		_doc_items_usagehelp = usagehelp,
 		drawtype = "nodebox",
 		tiles = tiles_closed,
-		use_texture_alpha = minetest.features.use_texture_alpha_string_modes and "clip" or true,
+		use_texture_alpha = "clip",
 		inventory_image = def.inventory_image,
 		wield_image = def.wield_image,
 		is_ground_content = false,
@@ -145,11 +158,13 @@ function mcl_doors:register_trapdoor(name, def)
 			fixed = {
 				{ -8 / 16, -8 / 16, -8 / 16, 8 / 16, -5 / 16, 8 / 16 }, },
 		},
-		mesecons = {effector = {
+		mesecons = {
+			effector = {
 				action_on = (function(pos, node)
 					punch(pos)
 				end),
-		}},
+			}
+		},
 		on_place = function(itemstack, placer, pointed_thing)
 			local p0 = pointed_thing.under
 			local p1 = pointed_thing.above
@@ -193,16 +208,44 @@ function mcl_doors:register_trapdoor(name, def)
 
 	groups_open.trapdoor = 2
 	groups_open.not_in_creative_inventory = 1
+	-- Non-climbable opened
 	minetest.register_node(name .. "_open", {
 		drawtype = "nodebox",
 		tiles = tiles_open,
-		use_texture_alpha = minetest.features.use_texture_alpha_string_modes and "clip" or true,
+		use_texture_alpha = "clip",
+		is_ground_content = false,
+		paramtype = "light",
+		paramtype2 = "facedir",
+		sunlight_propagates = true,
+		pointable = true,
+		groups = groups_open,
+		_mcl_hardness = def._mcl_hardness,
+		_mcl_blast_resistance = def._mcl_blast_resistance,
+		sounds = def.sounds,
+		drop = name,
+		node_box = {
+			type = "fixed",
+			fixed = { -0.5, -0.5, 5 / 16, 0.5, 0.5, 0.5 }
+		},
+		on_rightclick = on_rightclick,
+		mesecons = {
+			effector = {
+				action_off = (function(pos, node)
+					punch(pos)
+				end),
+			}
+		},
+		on_rotate = on_rotate,
+	})
+
+	-- Climbable opened
+	minetest.register_node(name .. "_ladder", {
+		drawtype = "nodebox",
+		tiles = tiles_open,
+		use_texture_alpha = "clip",
 		is_ground_content = false,
 		paramtype = "light",
 		paramtype2 = "facedir",
-		-- TODO: Implement Minecraft behaviour: Climbable if directly above
-		-- ladder w/ matching orientation.
-		-- Current behavour: Always climbable
 		climbable = true,
 		sunlight_propagates = true,
 		pointable = true,
@@ -216,16 +259,17 @@ function mcl_doors:register_trapdoor(name, def)
 			fixed = { -0.5, -0.5, 5 / 16, 0.5, 0.5, 0.5 }
 		},
 		on_rightclick = on_rightclick,
-		mesecons = {effector = {
+		mesecons = {
+			effector = {
 				action_off = (function(pos, node)
 					punch(pos)
 				end),
-		}},
+			}
+		},
 		on_rotate = on_rotate,
 	})
 
 	if minetest.get_modpath("doc") then
 		doc.add_entry_alias("nodes", name, "nodes", name .. "_open")
 	end
-
 end

mods/ITEMS/mcl_sculk/init.lua

@@ -215,9 +215,23 @@ minetest.register_node("mcl_sculk:vein", {
 		type = "wallmounted",
 	},
 	groups = {
-		handy = 1, axey = 1, shearsy = 1, swordy = 1, deco_block = 1,
-		dig_by_piston = 1, destroy_by_lava_flow = 1, sculk = 1, dig_by_water = 1,
+		handy = 1,
+		axey = 1,
+		shearsy = 1,
+		swordy = 1,
+		deco_block = 1,
+		dig_by_piston = 1,
+		destroy_by_lava_flow = 1,
+		sculk = 1,
+		dig_by_water = 1,
+		ladder = 1
 	},
+	after_destruct = function(pos, old)
+		mcl_core.update_trapdoor(pos, "destruct")
+	end,
+	after_place_node = function(pos)
+		mcl_core.update_trapdoor(pos, "place")
+	end,
 	sounds = sounds,
 	drop = "",
 	_mcl_shears_drop = true,