Many thanks to Smitje for providing a working example of roations.

Changes: fixed rotation and transposition of non-sqaure regions, makers are now moved to the new region boundaries after rotation/transposition, small consistency fixes, finally fix the /hide command.

Chat Commands.md

@@ -137,7 +137,7 @@ Stack the current WorldEdit region along the x/y/z/? axis <count> times.
 
 ### //transpose x/y/z/? x/y/z/?
 
-Transpose the current WorldEdit region along the x/y/z/? and x/y/z/? axes.
+Transpose the current WorldEdit positions and region along the x/y/z/? and x/y/z/? axes.
 
     //transpose x y
     //transpose x z
@@ -155,7 +155,7 @@ Flip the current WorldEdit region along the x/y/z/? axis.
 
 ### //rotate x/y/z/? <angle>
 
-Rotate the current WorldEdit region along the x/y/z/? axis by angle <angle> (90 degree increment).
+Rotate the current WorldEdit positions and region along the x/y/z/? axis by angle <angle> (integer multiple of 90 degrees).
 
     //rotate x 90
     //rotate y 180

WorldEdit API.md

@@ -38,11 +38,11 @@ Duplicates the region defined by positions `pos1` and `pos2` along the `axis` ax
 
 Returns the number of nodes stacked.
 
-### count = worldedit.transpose(pos1, pos2, axis1, axis2)
+### count, newpos1, newpos2 = worldedit.transpose(pos1, pos2, axis1, axis2)
 
 Transposes a region defined by the positions `pos1` and `pos2` between the `axis1` and `axis2` axes ("x" or "y" or "z").
 
-Returns the number of nodes transposed.
+Returns the number of nodes transposed, the new position 1, and the new position 2.
 
 ### count = worldedit.flip(pos1, pos2, axis)
 
@@ -50,11 +50,11 @@ Flips a region defined by the positions `pos1` and `pos2` along the `axis` axis
 
 Returns the number of nodes flipped.
 
-### count = worldedit.rotate(pos1, pos2, angle)
+### count, newpos2, newpos2 = worldedit.rotate(pos1, pos2, angle)
 
 Rotates a region defined by the positions `pos1` and `pos2` by `angle` degrees clockwise around the y axis (supporting 90 degree increments only).
 
-Returns the number of nodes rotated.
+Returns the number of nodes rotated, the new position 1, and the new position 2.
 
 ### count = worldedit.dig(pos1, pos2)
 
@@ -100,6 +100,8 @@ Returns the number of nodes added.
 
 Adds a spiral at `pos` with width `width`, height `height`, space between walls `spacer`, composed of `nodename`.
 
+Returns the number of nodes added.
+
 Visualization
 -------------
 Contained in visualization.lua, this module allows nodes to be visualized in different ways.

worldedit/manipulations.lua

@@ -191,10 +191,28 @@ worldedit.stack = function(pos1, pos2, axis, count)
 	return worldedit.volume(pos1, pos2)
 end
 
---transposes a region defined by the positions `pos1` and `pos2` between the `axis1` and `axis2` axes, returning the number of nodes transposed
+--transposes a region defined by the positions `pos1` and `pos2` between the `axis1` and `axis2` axes, returning the number of nodes transposed, the new position 1, and the new position 2
 worldedit.transpose = function(pos1, pos2, axis1, axis2)
 	local pos1, pos2 = worldedit.sort_pos(pos1, pos2)
 
+	local compare
+	local extent1, extent2 = pos2[axis1] - pos1[axis1], pos2[axis2] - pos1[axis2]
+
+	if extent1 > extent2 then
+		compare = function(extent1, extent2)
+			return extent1 > extent2
+		end
+	else
+		compare = function(extent1, extent2)
+			return extent1 < extent2
+		end
+	end
+
+	--calculate the new position 2 after transposition
+	local newpos2 = {x=pos1.x, y=pos1.y, z=pos1.z}
+	newpos2[axis1] = pos1[axis1] + extent2
+	newpos2[axis2] = pos1[axis2] + extent1
+
 	local pos = {x=pos1.x, y=0, z=0}
 	local env = minetest.env
 	while pos.x <= pos2.x do
@@ -203,16 +221,16 @@ worldedit.transpose = function(pos1, pos2, axis1, axis2)
 			pos.z = pos1.z
 			while pos.z <= pos2.z do
 				local extent1, extent2 = pos[axis1] - pos1[axis1], pos[axis2] - pos1[axis2]
-				if extent1 < extent2 then
+				if compare(extent1, extent2) then --transpose only if below the diagonal
 					local node1 = env:get_node(pos)
 					local meta1 = env:get_meta(pos):to_table()
-					local value1, value2 = pos[axis1], pos[axis2]
+					local value1, value2 = pos[axis1], pos[axis2] --save position values
-					pos[axis1], pos[axis2] = value1 + extent2, value2 + extent1
+					pos[axis1], pos[axis2] = pos1[axis1] + extent2, pos1[axis2] + extent1 --swap axis extents
 					local node2 = env:get_node(pos)
 					local meta2 = env:get_meta(pos):to_table()
 					env:add_node(pos, node1)
 					env:get_meta(pos):from_table(meta1)
-					pos[axis1], pos[axis2] = value1, value2
+					pos[axis1], pos[axis2] = value1, value2 --restore position values
 					env:add_node(pos, node2)
 					env:get_meta(pos):from_table(meta2)
 				end
@@ -222,7 +240,7 @@ worldedit.transpose = function(pos1, pos2, axis1, axis2)
 		end
 		pos.x = pos.x + 1
 	end
-	return worldedit.volume(pos1, pos2)
+	return worldedit.volume(pos1, pos2), pos1, newpos2
 end
 
 --flips a region defined by the positions `pos1` and `pos2` along the `axis` axis ("x" or "y" or "z"), returning the number of nodes flipped
@@ -272,17 +290,18 @@ worldedit.rotate = function(pos1, pos2, axis, angle)
 	end
 	angle = angle % 360
 
+	local count
 	if angle == 90 then
-		worldedit.transpose(pos1, pos2, axis1, axis2)
+		worldedit.flip(pos1, pos2, axis1)
-		worldedit.flip(pos1, pos2, axis2)
+		count, pos1, pos2 = worldedit.transpose(pos1, pos2, axis1, axis2)
 	elseif angle == 180 then
 		worldedit.flip(pos1, pos2, axis1)
-		worldedit.flip(pos1, pos2, axis2)
+		count = worldedit.flip(pos1, pos2, axis2)
 	elseif angle == 270 then
-		worldedit.transpose(pos1, pos2, axis1, axis2)
+		worldedit.flip(pos1, pos2, axis2)
-		worldedit.flip(pos1, pos2, axis1)
+		count, pos1, pos2 = worldedit.transpose(pos1, pos2, axis1, axis2)
 	end
-	return worldedit.volume(pos1, pos2)
+	return count, pos1, pos2
 end
 
 --digs a region defined by positions `pos1` and `pos2`, returning the number of nodes dug

worldedit_commands/init.lua

@@ -115,17 +115,17 @@ minetest.register_on_punchnode(function(pos, node, puncher)
 			worldedit.pos1[name] = pos
 			worldedit.mark_pos1(name)
 			worldedit.set_pos[name] = "pos2" --set position 2 on the next invocation
-			minetest.chat_send_player(name, "WorldEdit region position 1 set to " .. minetest.pos_to_string(pos))
+			minetest.chat_send_player(name, "WorldEdit position 1 set to " .. minetest.pos_to_string(pos))
 		elseif worldedit.set_pos[name] == "pos1only" then --setting position 1 only
 			worldedit.pos1[name] = pos
 			worldedit.mark_pos1(name)
 			worldedit.set_pos[name] = nil --finished setting positions
-			minetest.chat_send_player(name, "WorldEdit region position 1 set to " .. minetest.pos_to_string(pos))
+			minetest.chat_send_player(name, "WorldEdit position 1 set to " .. minetest.pos_to_string(pos))
 		elseif worldedit.set_pos[name] == "pos2" then --setting position 2
 			worldedit.pos2[name] = pos
 			worldedit.mark_pos2(name)
 			worldedit.set_pos[name] = nil --finished setting positions
-			minetest.chat_send_player(name, "WorldEdit region position 2 set to " .. minetest.pos_to_string(pos))
+			minetest.chat_send_player(name, "WorldEdit position 2 set to " .. minetest.pos_to_string(pos))
 		end
 	end
 end)
@@ -472,7 +472,14 @@ minetest.register_chatcommand("/transpose", {
 			return
 		end
 
-		local count = worldedit.transpose(pos1, pos2, axis1, axis2)
+		local count, pos1, pos2 = worldedit.transpose(pos1, pos2, axis1, axis2)
+
+		--reset markers to transposed positions
+		worldedit.pos1[name] = pos1
+		worldedit.pos2[name] = pos2
+		worldedit.mark_pos1(name)
+		worldedit.mark_pos2(name)
+
 		minetest.chat_send_player(name, count .. " nodes transposed")
 	end,
 })
@@ -525,7 +532,14 @@ minetest.register_chatcommand("/rotate", {
 			return
 		end
 
-		local count = worldedit.rotate(pos1, pos2, axis, angle)
+		local count, pos1, pos2 = worldedit.rotate(pos1, pos2, axis, angle)
+
+		--reset markers to rotated positions
+		worldedit.pos1[name] = pos1
+		worldedit.pos2[name] = pos2
+		worldedit.mark_pos1(name)
+		worldedit.mark_pos2(name)
+
 		minetest.chat_send_player(name, count .. " nodes rotated")
 	end,
 })
@@ -547,8 +561,24 @@ minetest.register_chatcommand("/dig", {
 })
 
 minetest.register_chatcommand("/hide", {
+	params = "",
+	description = "Hide all nodes in the current WorldEdit region non-destructively",
+	privs = {worldedit=true},
+	func = function(name, param)
+		local pos1, pos2 = worldedit.pos1[name], worldedit.pos2[name]
+		if pos1 == nil or pos2 == nil then
+			minetest.chat_send_player(name, "No WorldEdit region selected")
+			return
+		end
+
+		local count = worldedit.hide(pos1, pos2)
+		minetest.chat_send_player(name, count .. " nodes hidden")
+	end,
+})
+
+minetest.register_chatcommand("/suppress", {
 	params = "<node>",
-	description = "Hide all <node> in the current WorldEdit region non-destructively",
+	description = "Suppress all <node> in the current WorldEdit region non-destructively",
 	privs = {worldedit=true},
 	func = function(name, param)
 		local pos1, pos2 = worldedit.pos1[name], worldedit.pos2[name]
@@ -562,8 +592,8 @@ minetest.register_chatcommand("/hide", {
 			return
 		end
 
-		local count = worldedit.hide(pos1, pos2, param)
+		local count = worldedit.suppress(pos1, pos2, param)
-		minetest.chat_send_player(name, count .. " nodes hidden")
+		minetest.chat_send_player(name, count .. " nodes suppressed")
 	end,
 })