Merge pull request 'Slower creative digging' (#3284) from dig_speed into master

Reviewed-on: https://git.minetest.land/MineClone2/MineClone2/pulls/3284
Reviewed-by: ancientmarinerdev <ancientmariner_dev@proton.me>

mods/CORE/_mcl_autogroup/init.lua

@@ -204,7 +204,7 @@ end
 
 -- Checks if the given node would drop its useful drop if dug by a given tool.
 -- Returns true if it will yield its useful drop, false otherwise.
-function mcl_autogroup.can_harvest(nodename, toolname)
+function mcl_autogroup.can_harvest(nodename, toolname, player)
 	local ndef = minetest.registered_nodes[nodename]
 
 	if not ndef then
@@ -228,7 +228,9 @@ function mcl_autogroup.can_harvest(nodename, toolname)
 	end
 
 	-- Check if it can be dug by hand
-	local tdef = minetest.registered_tools[""]
+	if not player or not player:is_player() then return false end
+	local name = player:get_inventory():get_stack("hand", 1):get_name()
+	local tdef = minetest.registered_items[name]
 	if tdef then
 		for g, gdef in pairs(tdef._mcl_diggroups) do
 			if ndef.groups[g] then
@@ -260,7 +262,7 @@ local function get_tool_capabilities(tdef)
 
 	-- If the damage group and punch interval from hand is not included,
 	-- then the user will not be able to attack with the tool.
-	local hand_toolcaps = minetest.registered_tools[""].tool_capabilities
+	local hand_toolcaps = mcl_meshhand.survival_hand_tool_caps
 	return {
 		full_punch_interval = hand_toolcaps.full_punch_interval,
 		damage_groups = hand_toolcaps.damage_groups
@@ -280,7 +282,7 @@ end
 -- would have to add _mcl_autogroup as a dependency which would break the mod
 -- loading order.
 function mcl_autogroup.get_groupcaps(toolname, efficiency)
-	local tdef = minetest.registered_tools[toolname]
+	local tdef = minetest.registered_items[toolname]
 	local groupcaps = table.copy(get_tool_capabilities(tdef).groupcaps or {})
 	add_groupcaps(toolname, groupcaps, tdef._mcl_diggroups, efficiency)
 	return groupcaps
@@ -350,7 +352,7 @@ local function overwrite()
 		end
 	end
 
-	for tname, tdef in pairs(minetest.registered_tools) do
+	for tname, tdef in pairs(minetest.registered_items) do
 		-- Assign groupcaps for digging the registered digging groups
 		-- depending on the _mcl_diggroups in the tool definition
 		if tdef._mcl_diggroups then
@@ -360,6 +362,12 @@ local function overwrite()
 			minetest.override_item(tname, {
 				tool_capabilities = toolcaps
 			})
+		else
+			-- This is needed to deal damage when punching mobs
+			-- with random items in hand in survival mode
+			minetest.override_item(tname, {
+				tool_capabilities = mcl_meshhand.survival_hand_tool_caps
+			})
 		end
 	end
 end

mods/CORE/mcl_autogroup/API.md

@@ -1,10 +1,11 @@
 # mcl_autogroup
 This mod emulate digging times from mc.
 
-## mcl_autogroup.can_harvest(nodename, toolname)
-Return true if <nodename> can be dig with <toolname>.
+## mcl_autogroup.can_harvest(nodename, toolname, player)
+Return true if <nodename> can be dig with <toolname> by <player>.
 * nodename: string, valid nodename
 * toolname: (optional) string, valid toolname
+* player: (optinal) ObjectRef, valid player
 
 ## mcl_autogroup.get_groupcaps(toolname, efficiency)
 This function is used to calculate diggroups for tools.

mods/ENTITIES/mcl_item_entity/init.lua

@@ -252,10 +252,17 @@ function minetest.handle_node_drops(pos, drops, digger)
 	-- NOTE: This function override allows digger to be nil.
 	-- This means there is no digger. This is a special case which allows this function to be called
 	-- by hand. Creative Mode is intentionally ignored in this case.
-
-	if (digger and digger:is_player() and minetest.is_creative_enabled(digger:get_player_name())) or doTileDrops == false then
+	if digger and digger:is_player() and minetest.is_creative_enabled(digger:get_player_name()) then
+		local inv = digger:get_inventory()
+		if inv then
+			for _, item in ipairs(drops) do
+				if not inv:contains_item("main", item, true) then
+					inv:add_item("main", item)
+				end
+			end
+		end
 		return
-	end
+	elseif not doTileDrops then return end
 
 	-- Check if node will yield its useful drop by the digger's tool
 	local dug_node = minetest.get_node(pos)
@@ -263,9 +270,9 @@ function minetest.handle_node_drops(pos, drops, digger)
 	local tool
 	if digger then
 		tool = digger:get_wielded_item()
-		tooldef = minetest.registered_tools[tool:get_name()]
+		tooldef = minetest.registered_items[tool:get_name()]
 
-		if not mcl_autogroup.can_harvest(dug_node.name, tool:get_name()) then
+		if not mcl_autogroup.can_harvest(dug_node.name, tool:get_name(), digger) then
 			return
 		end
 	end

mods/HUD/mcl_inventory/creative.lua

@@ -156,6 +156,7 @@ local function set_inv_page(page, player)
 		creative_list = inventory_lists[page]
 	end
 	inv:set_size("main", #creative_list)
+	players[playername].inv_size = #creative_list
 	inv:set_list("main", creative_list)
 end
 
@@ -304,37 +305,21 @@ minetest.register_on_joinplayer(function (player)
 	end
 end)
 
-function mcl_inventory.set_creative_formspec(player, start_i, pagenum, inv_size, show, page, filter)
-	--reset_menu_item_bg()
-	pagenum = math.floor(pagenum) or 1
-
+function mcl_inventory.set_creative_formspec(player)
 	local playername = player:get_player_name()
+	if not players[playername] then return end
 
-	if not inv_size then
-		if page == "nix" then
-			local inv = minetest.get_inventory({type="detached", name="creative_"..playername})
-			inv_size = inv:get_size("main")
-		elseif page and page ~= "inv" then
-			inv_size = #(inventory_lists[page])
-		else
-			inv_size = 0
-		end
-	end
+	local start_i = players[playername].start_i
+	local pagenum = start_i / (9*5) + 1
+	local name = players[playername].page
+	local inv_size = players[playername].inv_size
+	local filter = players[playername].filter
 	local pagemax = math.max(1, math.floor((inv_size-1) / (9*5) + 1))
-	local name = "nix"
 	local main_list
 	local listrings = "listring[detached:creative_"..playername..";main]"..
 		"listring[current_player;main]"..
 		"listring[detached:trash;main]"
 
-	if page then
-		name = page
-		if players[playername] then
-			players[playername].page = page
-		end
-	end
-	--bg[name] = "crafting_creative_bg.png"
-
 	local inv_bg = "crafting_inventory_creative.png"
 	if name == "inv" then
 		inv_bg = "crafting_inventory_creative_survival.png"
@@ -493,9 +478,6 @@ function mcl_inventory.set_creative_formspec(player, start_i, pagenum, inv_size,
 		listrings
 
 	if name == "nix" then
-		if filter == nil then
-			filter = ""
-		end
 		formspec = formspec .. "field[5.3,1.34;4,0.75;search;;"..minetest.formspec_escape(filter).."]"
 		formspec = formspec .. "field_close_on_enter[search;false]"
 	end
@@ -582,16 +564,11 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 
 	if page then
 		players[name].page = page
-	end
-	if players[name].page then
+	else
 		page = players[name].page
 	end
 
-	-- Figure out current scroll bar from formspec
-	--local formspec = player:get_inventory_formspec()
-
 	local start_i = players[name].start_i
-
 	if fields.creative_prev then
 		start_i = start_i - 9*5
 	elseif fields.creative_next then
@@ -613,6 +590,7 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 	else
 		inv_size = 0
 	end
+	players[name].inv_size = inv_size
 
 	if start_i >= inv_size then
 		start_i = start_i - 9*5
@@ -622,72 +600,19 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 	end
 	players[name].start_i = start_i
 
-	local filter = ""
-	if not fields.nix and fields.search and fields.search ~= "" then
-		filter = fields.search
-		players[name].filter = filter
+	if not fields.nix and fields.search then
+		players[name].filter = fields.search
+	else
+		players[name].filter = ""
 	end
 
-	mcl_inventory.set_creative_formspec(player, start_i, start_i / (9*5) + 1, inv_size, false, page, filter)
+	mcl_inventory.set_creative_formspec(player)
 end)
 
 
-if minetest.is_creative_enabled("") then
-	minetest.register_on_placenode(function(pos, newnode, placer, oldnode, itemstack)
-		-- Place infinite nodes, except for shulker boxes
-		local group = minetest.get_item_group(itemstack:get_name(), "shulker_box")
-		return group == 0 or group == nil
-	end)
-
-	function minetest.handle_node_drops(pos, drops, digger)
-		if not digger or not digger:is_player() then
-			for _,item in ipairs(drops) do
-				minetest.add_item(pos, item)
-			end
-		end
-		local inv = digger:get_inventory()
-		if inv then
-			for _,item in ipairs(drops) do
-				if not inv:contains_item("main", item, true) then
-					inv:add_item("main", item)
-				end
-			end
-		end
-	end
-
-	mcl_inventory.update_inventory_formspec = function(player)
-		local page
-
-		local name = player:get_player_name()
-
-		if players[name].page then
-			page = players[name].page
-		else
-			page = "nix"
-		end
-
-		-- Figure out current scroll bar from formspec
-		--local formspec = player:get_inventory_formspec()
-		local start_i = players[name].start_i
-
-		local inv_size
-		if page == "nix" then
-			local inv = minetest.get_inventory({type="detached", name="creative_"..name})
-			inv_size = inv:get_size("main")
-		elseif page and page ~= "inv" then
-			inv_size = #(inventory_lists[page])
-		else
-			inv_size = 0
-		end
-
-		local filter = players[name].filter
-		if filter == nil then
-			filter = ""
-		end
-
-		mcl_inventory.set_creative_formspec(player, start_i, start_i / (9*5) + 1, inv_size, false, page, filter)
-	end
-end
+minetest.register_on_placenode(function(pos, newnode, placer, oldnode, itemstack)
+	return placer and placer:is_player() and minetest.is_creative_enabled(placer:get_player_name())
+end)
 
 minetest.register_on_joinplayer(function(player)
 	-- Initialize variables and inventory
@@ -700,7 +625,7 @@ minetest.register_on_joinplayer(function(player)
 	end
 	init(player)
 	-- Setup initial creative inventory to the "nix" page.
-	mcl_inventory.set_creative_formspec(player, 0, 1, nil, false, "nix", "")
+	mcl_inventory.set_creative_formspec(player)
 end)
 
 minetest.register_on_player_inventory_action(function(player, action, inventory, inventory_info)

mods/HUD/mcl_inventory/init.lua

@@ -46,14 +46,9 @@ function return_fields(player, name)
 	end
 end
 
-local function set_inventory(player, armor_change_only)
+local function set_inventory(player)
 	if minetest.is_creative_enabled(player:get_player_name()) then
-		if armor_change_only then
-			-- Stay on survival inventory plage if only the armor has been changed
-			mcl_inventory.set_creative_formspec(player, 0, 0, nil, nil, "inv")
-		else
-			mcl_inventory.set_creative_formspec(player, 0, 1)
-		end
+		mcl_inventory.set_creative_formspec(player)
 		return
 	end
 	local inv = player:get_inventory()
@@ -143,11 +138,7 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 	end
 end)
 
-if not minetest.is_creative_enabled("") then
-	function mcl_inventory.update_inventory_formspec(player)
-		set_inventory(player)
-	end
-end
+mcl_inventory.update_inventory_formspec = set_inventory
 
 -- Drop crafting grid items on leaving
 minetest.register_on_leaveplayer(function(player)
@@ -199,24 +190,6 @@ function minetest.is_creative_enabled(name)
 	return false
 end
 
---Insta "digging" nodes in gamemode-creative
-minetest.register_on_punchnode(function(pos, node, puncher, pointed_thing)
-	if not puncher or not puncher:is_player() then return end
-	local name = puncher:get_player_name()
-	if not minetest.is_creative_enabled(name) then return end
-	if pointed_thing.type ~= "node" then return end
-	local def = minetest.registered_nodes[node.name]
-	if def then
-		minetest.node_dig(pos,node,puncher)
-		return true
-	end
-end)
-
---Don't subtract from inv when placing in gamemode-creative
-minetest.register_on_placenode(function(pos, newnode, placer, oldnode, itemstack, pointed_thing)
-	if placer and placer:is_player() and minetest.is_creative_enabled(placer:get_player_name()) then return true end
-end)
-
 local function in_table(n,h)
 	for k,v in pairs(h) do
 		if v == n then return true end
@@ -238,6 +211,7 @@ function mcl_inventory.player_set_gamemode(p,g)
 	elseif g == "creative" then
 		 mcl_experience.remove_hud(p)
 	end
+	mcl_meshhand.update_player(p)
 	set_inventory(p)
 end
 

mods/ITEMS/mcl_tools/init.lua

@@ -19,50 +19,6 @@ dig_speed_class group:
 - 7: Instantaneous
 ]]
 
--- The hand
-local groupcaps, hand_range, hand_groups
-
-if minetest.is_creative_enabled("") then
-	-- Instant breaking in creative mode
-	groupcaps = { creative_breakable = { times = {0}, uses = 0 } }
-	hand_range = tonumber(minetest.settings:get("mcl_hand_range_creative")) or 10
-	hand_groups = { dig_speed_class = 7 }
-else
-	groupcaps = {}
-	hand_range = tonumber(minetest.settings:get("mcl_hand_range")) or 4.5
-	hand_groups = { dig_speed_class = 1 }
-end
-minetest.register_tool(":", {
-	type = "none",
-	_doc_items_longdesc = S("You use your bare hand whenever you are not wielding any item. With your hand you can mine most blocks, but this is the slowest method and only the weakest blocks will yield their useful drop. The hand also deals minor damage by punching. Using the hand is often a last resort, as proper mining tools and weapons are much better.").."\n"..
-			S("When you are wielding an item which is not a mining tool or a weapon, it will behave as if it were the hand when you start mining or punching.").."\n"..
-			S("In Creative Mode, the hand is able to break all blocks instantly."),
-	wield_image = "blank.png",
-	wield_scale = {x=1.0,y=1.0,z=2.0},
-	-- According to Minecraft Wiki, the exact range is 3.975.
-	-- Minetest seems to only support whole numbers, so we use 4.
-	range = hand_range,
-	tool_capabilities = {
-		full_punch_interval = 0.25,
-		max_drop_level = 0,
-		groupcaps = groupcaps,
-		damage_groups = {fleshy=1},
-	},
-	groups = hand_groups,
-	_mcl_diggroups = {
-		handy = { speed = 1, level = 1, uses = 0 },
-		axey = { speed = 1, level = 1, uses = 0 },
-		shovely = { speed = 1, level = 1, uses = 0 },
-		hoey = { speed = 1, level = 1, uses = 0 },
-		pickaxey = { speed = 1, level = 0, uses = 0 },
-		swordy = { speed = 1, level = 0, uses = 0 },
-		swordy_cobweb = { speed = 1, level = 0, uses = 0 },
-		shearsy = { speed = 1, level = 0, uses = 0 },
-		shearsy_wool = { speed = 1, level = 0, uses = 0 },
-		shearsy_cobweb = { speed = 1, level = 0, uses = 0 },
-	}
-})
-
 -- Help texts
 local pickaxe_longdesc = S("Pickaxes are mining tools to mine hard blocks, such as stone. A pickaxe can also be used as weapon, but it is rather inefficient.")
 local axe_longdesc = S("An axe is your tool of choice to cut down trees, wood-based blocks and other blocks. Axes deal a lot of damage as well, but they are rather slow.")

mods/PLAYER/mcl_meshhand/init.lua

@@ -1,4 +1,5 @@
 local mcl_skins_enabled = minetest.global_exists("mcl_skins")
+mcl_meshhand = { }
 
 ---This is a fake node that should never be placed in the world
 ---@type node_definition
@@ -15,43 +16,77 @@ local node_def = {
 	end,
 	drop = "",
 	on_drop = function(_, _, _) return ItemStack() end,
-	groups = { dig_immediate = 3, not_in_creative_inventory = 1 },
-	range = minetest.registered_items[""].range
+	groups = {
+		dig_immediate = 3,
+		not_in_creative_inventory = 1,
+		dig_speed_class = 1,
+	},
+	tool_capabilities = {
+		full_punch_interval = 0.25,
+		max_drop_level = 0,
+		groupcaps = { },
+		damage_groups = { fleshy = 1 },
+	},
+	_mcl_diggroups = {
+		handy = { speed = 1, level = 1, uses = 0 },
+		axey = { speed = 1, level = 1, uses = 0 },
+		shovely = { speed = 1, level = 1, uses = 0 },
+		hoey = { speed = 1, level = 1, uses = 0 },
+		pickaxey = { speed = 1, level = 0, uses = 0 },
+		swordy = { speed = 1, level = 0, uses = 0 },
+		swordy_cobweb = { speed = 1, level = 0, uses = 0 },
+		shearsy = { speed = 1, level = 0, uses = 0 },
+		shearsy_wool = { speed = 1, level = 0, uses = 0 },
+		shearsy_cobweb = { speed = 1, level = 0, uses = 0 },
+	},
+	range = tonumber(minetest.settings:get("mcl_hand_range")) or 4.5
 }
 
+-- This is for _mcl_autogroup to know about the survival hand tool capabilites
+mcl_meshhand.survival_hand_tool_caps = node_def.tool_capabilities
+
+local creative_dig_speed = tonumber(minetest.settings:get("mcl_creative_dig_speed")) or 0.2
+local creative_hand_range = tonumber(minetest.settings:get("mcl_hand_range_creative")) or 10
 if mcl_skins_enabled then
 	-- Generate a node for every skin
 	local list = mcl_skins.get_skin_list()
 	for _, skin in pairs(list) do
-		if skin.slim_arms then
-			local female = table.copy(node_def)
-			female._mcl_hand_id = skin.id
-			female.mesh = "mcl_meshhand_female.b3d"
-			female.tiles = { skin.texture }
-			minetest.register_node("mcl_meshhand:" .. skin.id, female)
-		else
-			local male = table.copy(node_def)
-			male._mcl_hand_id = skin.id
-			male.mesh = "mcl_meshhand.b3d"
-			male.tiles = { skin.texture }
-			minetest.register_node("mcl_meshhand:" .. skin.id, male)
+		local node_def = table.copy(node_def)
+		node_def._mcl_hand_id = skin.id
+		node_def.tiles = { skin.texture }
+		node_def.mesh = skin.slim_arms and "mcl_meshhand_female.b3d" or "mcl_meshhand.b3d"
+		if skin.creative then
+			node_def.range = creative_hand_range
+			node_def.groups.dig_speed_class = 7
+			node_def.tool_capabilities.groupcaps.creative_breakable = { times = { creative_dig_speed }, uses = 0 }
 		end
+		minetest.register_node("mcl_meshhand:" .. skin.id, node_def)
 	end
 else
 	node_def._mcl_hand_id = "hand"
 	node_def.mesh = "mcl_meshhand.b3d"
 	node_def.tiles = { "character.png" }
-	minetest.register_node("mcl_meshhand:hand", node_def)
+	minetest.register_node("mcl_meshhand:hand_surv", node_def)
+
+	node_def = table.copy(node_def)
+	node_def.range = creative_hand_range
+	node_def.groups.dig_speed_class = 7
+	node_def.tool_capabilities.groupcaps.creative_breakable = { times = { creative_dig_speed }, uses = 0 }
+	minetest.register_node("mcl_meshhand:hand_crea", node_def)
+end
+
+function mcl_meshhand.update_player(player)
+	if mcl_skins_enabled then
+		local node_id = mcl_skins.get_node_id_by_player(player)
+		player:get_inventory():set_stack("hand", 1, "mcl_meshhand:" .. node_id)
+	else
+		local creative = minetest.is_creative_enabled(player:get_player_name())
+		player:get_inventory():set_stack("hand", 1, "mcl_meshhand:hand" .. (creative and "_crea" or "_surv"))
+	end
 end
 
 if mcl_skins_enabled then
-	-- Change the player's hand to their skin
-	mcl_player.register_on_visual_change(function(player)
-		local node_id = mcl_skins.get_node_id_by_player(player)
-		player:get_inventory():set_stack("hand", 1, "mcl_meshhand:" .. node_id)
-	end)
+	mcl_player.register_on_visual_change(mcl_meshhand.update_player)
 else
-	minetest.register_on_joinplayer(function(player)
-		player:get_inventory():set_stack("hand", 1, ItemStack("mcl_meshhand:hand"))
-	end)
+	minetest.register_on_joinplayer(mcl_meshhand.update_player)
 end

mods/PLAYER/mcl_skins/mesh_hand.lua

@@ -11,43 +11,51 @@ end
 
 function mcl_skins.get_skin_list()
 	local list = {}
-	for _, base in pairs(mcl_skins.base) do
-		for _, base_color in pairs(mcl_skins.base_color) do
-			local id = base:gsub(".png$", "") .. minetest.colorspec_to_colorstring(base_color):gsub("#", "")
-			local female = {
-				texture = make_texture(base, base_color),
-				slim_arms = true,
-				id = id .. "_female"
-			}
-			table.insert(list, female)
+	for _, game_mode in pairs({"_crea", "_surv"}) do
+		for _, base in pairs(mcl_skins.base) do
+			for _, base_color in pairs(mcl_skins.base_color) do
+				local id = base:gsub(".png$", "") .. minetest.colorspec_to_colorstring(base_color):gsub("#", "")
+				local female = {
+					texture = make_texture(base, base_color),
+					slim_arms = true,
+					id = id .. "_female" .. game_mode,
+					creative = game_mode == "_crea"
+				}
+				table.insert(list, female)
 				
-			local male = {
-				texture = make_texture(base, base_color),
-				slim_arms = false,
-				id = id .. "_male"
-			}
-			table.insert(list, male)
+				local male = {
+					texture = make_texture(base, base_color),
+					slim_arms = false,
+					id = id .. "_male" .. game_mode,
+					creative = game_mode == "_crea"
+				}
+				table.insert(list, male)
+			end
+		end
+		for _, skin in pairs(mcl_skins.simple_skins) do
+			table.insert(list, {
+				texture = skin.texture,
+				slim_arms = skin.slim_arms,
+				id = skin.texture:gsub(".png$", "") .. (skin.slim_arms and "_female" or "_male") .. game_mode,
+				creative = game_mode == "_crea"
+			})
 		end
-	end
-	for _, skin in pairs(mcl_skins.simple_skins) do
-		table.insert(list, {
-			texture = skin.texture,
-			slim_arms = skin.slim_arms,
-			id = skin.texture:gsub(".png$", "") .. "_" .. (skin.slim_arms and "female" or "male"),
-		})
 	end
 	return list
 end
 
 function mcl_skins.get_node_id_by_player(player)
 	local skin = mcl_skins.players[player]
-	if skin.simple_skins_id then
-		local skin = mcl_skins.simple_skins[skin.simple_skins_id]
-		return skin.texture:gsub(".png$", "") ..
-			"_" .. (skin.slim_arms and "female" or "male")
+	local simple_skin = skin.simple_skins_id
+	if simple_skin then
+		skin = mcl_skins.simple_skins[skin.simple_skins_id]
+	end
+	local creative = minetest.is_creative_enabled(player:get_player_name())
+	local append = (skin.slim_arms and "_female" or "_male") .. (creative and "_crea" or "_surv")
+	if simple_skin then
+		return skin.texture:gsub(".png$", "") .. append
 	else
 		return skin.base:gsub(".png$", "") ..
-			minetest.colorspec_to_colorstring(skin.base_color):gsub("#", "") ..
-			"_" .. (skin.slim_arms and "female" or "male")
+			minetest.colorspec_to_colorstring(skin.base_color):gsub("#", "") .. append
 	end
 end

settingtypes.txt

@@ -76,10 +76,13 @@ mcl_enable_skin_customization (Enable player skin customization) bool true
 # Default:4.5
 mcl_hand_range (Hand range) float 4.5 1 128
 
-# How far the player hand can reach in creative mode (not gamemode-creative)
+# How far the player hand can reach in creative mode
 # Default:10
 mcl_hand_range_creative (Creative mode hand range) float 10 1 128
 
+# Creative mode dig speed in seconds
+mcl_creative_dig_speed (Creative mode dig speed) float 0.2
+
 # If enabled the hunger mechanic will be active
 mcl_enable_hunger (Hunger mechanic) bool true