Improve node inspector to show player axis, replace //scale with //stretch, which supports per-axis stretching (full backwards compatibility retained), and secure schematic file loading functions.

Chat Commands.md

@@ -22,6 +22,7 @@ Enable or disable node inspection.
     //inspect no
     //inspect enable
     //inspect disable
+    //inspect
 
 ### //reset
 

README.md

@@ -37,7 +37,7 @@ WorldEdit works primarily through the WorldEdit GUI and chat commands. Depending
 
 WorldEdit has a huge potential for abuse by untrusted players. Therefore, users will not be able to use WorldEdit unless they have the `worldedit` privelege. This is available by default in single player, but in multiplayer the permission must be explicitly given by someone with the right credentials, using the follwoing chat command: `/grant <player name> worldedit`. This privelege can later be removed using the following chat command: `/revoke <player name> worldedit`.
 
-Certain functions/commands such as WorldEdit GUI's "Run Lua" (equivalent to the `//lua` chat command) additionally require the `server` privilege. This is because it is extremely dangerous to give access to these commands to untrusted players, since they essentially are able to control the computer the server is running on. Give this privilege only to people you trust with your computer.
+Certain functions/commands such as WorldEdit GUI's "Run Lua" function (equivalent to the `//lua` and `//luatransform` chat command) additionally require the `server` privilege. This is because it is extremely dangerous to give access to these commands to untrusted players, since they essentially are able to control the computer the server is running on. Give this privilege only to people you trust with your computer.
 
 For in-game information about these commands, type `/help <command name>` in the chat. For example, to learn more about the `//copy` command, simply type `/help /copy` to display information relevant to copying a region.
 

WorldEdit API.md

@@ -57,11 +57,11 @@ Duplicates the region defined by positions `pos1` and `pos2` along the `axis` ax
 
 Returns the number of nodes stacked.
 
-### count, newpos1, newpos2 = worldedit.scale(pos1, pos2, factor)
+### count, newpos1, newpos2 = worldedit.stretch(pos1, pos2, stretchx, stretchy, stretchz)
 
-Scales the region defined by positions `pos1` and `pos2` by an factor of positive integer `factor` with `pos1` as the origin.
+Stretches the region defined by positions `pos1` and `pos2` by an factor of positive integers `stretchx`, `stretchy`. and `stretchz` along the X, Y, and Z axes, respectively, with `pos1` as the origin.
 
-Returns the number of nodes scaled, the new scaled position 1, and the new scaled position 2.
+Returns the number of nodes stretched, the new scaled position 1, and the new scaled position 2.
 
 ### count, newpos1, newpos2 = worldedit.transpose(pos1, pos2, axis1, axis2)
 

worldedit/compatibility.lua

@@ -18,3 +18,6 @@ worldedit.metaload = function(originpos, filename)
 	local data = file:read("*a")
 	return worldedit.deserialize(originpos, data)
 end
+worldedit.scale = function(pos1, pos2, factor)
+	return worldedit.stretch(pos1, pos2, factor, factor, factor)
+end

worldedit/manipulations.lua

@@ -109,7 +109,7 @@ worldedit.replaceinverse = function(pos1, pos2, searchnode, replacenode)
 	return count
 end
 
-worldedit.copy = function(pos1, pos2, axis, amount)
+worldedit.copy = function(pos1, pos2, axis, amount) --wip: replace the old version below
 	local pos1, pos2 = worldedit.sort_pos(pos1, pos2)
 
 	if amount == 0 then
@@ -291,24 +291,28 @@ worldedit.stack = function(pos1, pos2, axis, count)
 	return worldedit.volume(pos1, pos2) * count
 end
 
---scales the region defined by positions `pos1` and `pos2` by an factor of positive integer `factor` with `pos1` as the origin, returning the number of nodes scaled, the new scaled position 1, and the new scaled position 2
+--stretches the region defined by positions `pos1` and `pos2` by an factor of positive integers `stretchx`, `stretchy`. and `stretchz` along the X, Y, and Z axes, respectively, with `pos1` as the origin, returning the number of nodes scaled, the new scaled position 1, and the new scaled position 2
-worldedit.scale = function(pos1, pos2, factor)
+worldedit.stretch = function(pos1, pos2, stretchx, stretchy, stretchz) --wip: test this
 	local pos1, pos2 = worldedit.sort_pos(pos1, pos2)
 
 	--prepare schematic of large node
 	local get_node, get_meta, place_schematic = minetest.get_node, minetest.get_meta, minetest.place_schematic
 	local placeholder_node = {name="", param1=255, param2=0}
 	local nodes = {}
-	for i = 1, factor ^ 3 do
+	for i = 1, stretchx * stretchy * stretchz do
 		nodes[i] = placeholder_node
 	end
-	local schematic = {size={x=factor, y=factor, z=factor}, data=nodes}
+	local schematic = {size={x=stretchx, y=stretchy, z=stretchz}, data=nodes}
 
-	local size = factor - 1
+	local sizex, sizey, sizez = stretchx - 1, stretchy - 1, stretchz - 1
 
 	--make area stay loaded
 	local manip = minetest.get_voxel_manip()
-	local new_pos2 = {x=pos1.x + (pos2.x - pos1.x) * factor + size, y=pos1.y + (pos2.y - pos1.y) * factor + size, z=pos1.z + (pos2.z - pos1.z) * factor + size}
+	local new_pos2 = {
+		x=pos1.x + (pos2.x - pos1.x) * stretchx + sizex,
+		y=pos1.y + (pos2.y - pos1.y) * stretchy + sizey,
+		z=pos1.z + (pos2.z - pos1.z) * stretchz + sizez,
+	}
 	manip:read_from_map(pos1, new_pos2)
 
 	local pos = {x=pos2.x, y=0, z=0}
@@ -321,8 +325,10 @@ worldedit.scale = function(pos1, pos2, factor)
 				local node = get_node(pos) --obtain current node
 				local meta = get_meta(pos):to_table() --get meta of current node
 
-				local value = pos[axis] --store current position
+				--calculate far corner of the big node
-				local posx, posy, posz = pos1.x + (pos.x - pos1.x) * factor, pos1.y + (pos.y - pos1.y) * factor, pos1.z + (pos.z - pos1.z) * factor
+				local posx = pos1.x + (pos.x - pos1.x) * stretchx
+				local posy = pos1.y + (pos.y - pos1.y) * stretchy
+				local posz = pos1.z + (pos.z - pos1.z) * stretchz
 
 				--create large node
 				placeholder_node.name = node.name
@@ -331,10 +337,10 @@ worldedit.scale = function(pos1, pos2, factor)
 				place_schematic(bigpos, schematic)
 
 				--fill in large node meta
-				if next(meta.fields) ~= nil and next(meta.inventory) ~= nil then --node has meta fields
+				if next(meta.fields) ~= nil or next(meta.inventory) ~= nil then --node has meta fields
-					for x = 0, size do
+					for x = 0, sizex do
-						for y = 0, size do
+						for y = 0, sizey do
-							for z = 0, size do
+							for z = 0, sizez do
 								bigpos.x, bigpos.y, bigpos.z = posx + x, posy + y, posz + z
 								get_meta(bigpos):from_table(meta) --set metadata of new node
 							end
@@ -347,7 +353,7 @@ worldedit.scale = function(pos1, pos2, factor)
 		end
 		pos.x = pos.x - 1
 	end
-	return worldedit.volume(pos1, pos2) * (factor ^ 3), pos1, new_pos2
+	return worldedit.volume(pos1, pos2) * stretchx * stretchy * stretchz, pos1, new_pos2
 end
 
 --transposes a region defined by the positions `pos1` and `pos2` between the `axis1` and `axis2` axes, returning the number of nodes transposed, the new transposed position 1, and the new transposed position 2

worldedit_commands/init.lua

@@ -61,16 +61,18 @@ minetest.register_chatcommand("/about", {
 })
 
 minetest.register_chatcommand("/inspect", {
-	params = "on/off/1/0/true/false/yes/no/enable/disable",
+	params = "on/off/1/0/true/false/yes/no/enable/disable/<blank>",
 	description = "Enable or disable node inspection",
 	privs = {worldedit=true},
 	func = function(name, param)
-		if param == "on" or param == "1" or param == "true" or param == "yes" or param == "enable" then
+		if param == "on" or param == "1" or param == "true" or param == "yes" or param == "enable" or param == "" then
 			worldedit.inspect[name] = true
-			worldedit.player_notify(name, "node inspection enabled")
+			local axis, sign = worldedit.player_axis(name)
+			worldedit.player_notify(name, string.format("inspector: inspection enabled for %s, currently facing the %s axis",
+				name, axis .. (sign > 0 and "+" or "-")))
 		elseif param == "off" or param == "0" or param == "false" or param == "no" or param == "disable" then
 			worldedit.inspect[name] = nil
-			worldedit.player_notify(name, "node inspection disabled")
+			worldedit.player_notify(name, "inspector: inspection disabled")
 		else
 			worldedit.player_notify(name, "invalid usage: " .. param)
 		end
@@ -81,7 +83,9 @@ minetest.register_on_punchnode(function(pos, node, puncher)
 	local name = puncher:get_player_name()
 	if worldedit.inspect[name] then
 		if minetest.check_player_privs(name, {worldedit=true}) then
-			message = "inspector: " .. node.name .. " at " .. minetest.pos_to_string(pos) .. " (param1=" .. node.param1 .. ", param2=" .. node.param2 .. ")"
+			local axis, sign = worldedit.player_axis(name)
+			message = string.format("inspector: %s at %s (param1=%d, param2=%d) punched by %s facing the %s axis",
+				node.name, minetest.pos_to_string(pos), node.param1, node.param2, name, axis .. (sign > 0 and "+" or "-"))
 		else
 			message = "inspector: worldedit privileges required"
 		end
@@ -658,9 +662,9 @@ minetest.register_chatcommand("/stack", {
 	end,
 })
 
-minetest.register_chatcommand("/scale", {
+minetest.register_chatcommand("/stretch", {
-	params = "<factor>",
+	params = "<stretchx> <stretchy> <stretchz>",
-	description = "Scale the current WorldEdit positions and region by a factor of positive integer <factor> with position 1 as the origin",
+	description = "Scale the current WorldEdit positions and region by a factor of <stretchx>, <stretchy>, <stretchz> along the X, Y, and Z axes, repectively, with position 1 as the origin",
 	privs = {worldedit=true},
 	func = function(name, param)
 		local pos1, pos2 = worldedit.pos1[name], worldedit.pos2[name]
@@ -669,12 +673,17 @@ minetest.register_chatcommand("/scale", {
 			return
 		end
 
-		local factor = tonumber(param)
+		local found, _, stretchx, stretchy, stretchz = param:find("^(%d+)%s+(%d+)%s+(%d+)$")
-		if not factor or factor ~= math.floor(factor) or factor <= 0 then
+		if found == nil then
+			worldedit.player_notify(name, "invalid usage: " .. param)
+			return
+		end
+		stretchx, stretchy, stretchz = tonumber(stretchx), tonumber(stretchy), tonumber(stretchz)
+		if stretchx == 0 or stretchy == 0 or stretchz == 0 then
 			worldedit.player_notify(name, "invalid scaling factor: " .. param)
 		end
 
-		local count, pos1, pos2 = worldedit.scale(pos1, pos2, factor)
+		local count, pos1, pos2 = worldedit.stretch(pos1, pos2, stretchx, stretchy, stretchz)
 
 		--reset markers to scaled positions
 		worldedit.pos1[name] = pos1
@@ -682,7 +691,7 @@ minetest.register_chatcommand("/scale", {
 		worldedit.mark_pos1(name)
 		worldedit.mark_pos2(name)
 
-		worldedit.player_notify(name, count .. " nodes scaled")
+		worldedit.player_notify(name, count .. " nodes stretched")
 	end,
 })
 
@@ -919,6 +928,10 @@ minetest.register_chatcommand("/save", {
 			worldedit.player_notify(name, "invalid usage: " .. param)
 			return
 		end
+		if not string.find(param, "^[%w \t.,+-_=!@#$%%^&*()%[%]{};'\"]+$") then
+			worldedit.player_notify(name, "invalid file name: " .. param)
+			return
+		end
 
 		local result, count = worldedit.serialize(pos1, pos2)
 
@@ -953,6 +966,10 @@ minetest.register_chatcommand("/allocate", {
 			worldedit.player_notify(name, "invalid usage: " .. param)
 			return
 		end
+		if not string.find(param, "^[%w \t.,+-_=!@#$%%^&*()%[%]{};'\"]+$") then
+			worldedit.player_notify(name, "invalid file name: " .. param)
+			return
+		end
 
 		local filename = minetest.get_worldpath() .. "/schems/" .. param .. ".we"
 		local file, err = io.open(filename, "rb")
@@ -993,6 +1010,10 @@ minetest.register_chatcommand("/load", {
 			worldedit.player_notify(name, "invalid usage: " .. param)
 			return
 		end
+		if not string.find(param, "^[%w \t.,+-_=!@#$%%^&*()%[%]{};'\"]+$") then
+			worldedit.player_notify(name, "invalid file name: " .. param)
+			return
+		end
 
 		--find the file in the world path
 		local testpaths = {