Add //convolve command

....but it's all untested of course :P

worldeditadditions/lib/convolution/convolution.lua

@@ -12,7 +12,7 @@ dofile(worldeditadditions.modpath.."/lib/conv/convolve.lua")
 -- @param	width	number	The width of the kernel to create (must be an odd integer).
 -- @param	height	number	The height of the kernel to create (must be an odd integer).
 -- @param	arg		number	The argument to pass when creating the kernel. Currently only used by gaussian kernel as the sigma value.
-function worldeditadditions.get_kernel(name, width, height, arg)
+function worldeditadditions.get_conv_kernel(name, width, height, arg)
 	if width % 2 ~= 1 then
 		return false, "Error: The width must be an odd integer.";
 	end
@@ -33,6 +33,8 @@ function worldeditadditions.get_kernel(name, width, height, arg)
 		local success, result = worldeditadditions.conv.kernel_gaussian(width, arg)
 		return success, result
 	end
+	
+	return false, "Error: Unknown kernel. Valid values: box, pascal, gaussian"
 end
 
 

worldeditadditions_commands/commands/convolve.lua

@@ -0,0 +1,74 @@
+--  ██████  ██████  ███    ██ ██    ██  ██████  ██     ██    ██ ███████
+-- ██      ██    ██ ████   ██ ██    ██ ██    ██ ██     ██    ██ ██
+-- ██      ██    ██ ██ ██  ██ ██    ██ ██    ██ ██     ██    ██ █████
+-- ██      ██    ██ ██  ██ ██  ██  ██  ██    ██ ██      ██  ██  ██
+--  ██████  ██████  ██   ████   ████    ██████  ███████  ████   ███████
+worldedit.register_command("convolve", {
+	params = "<kernel> [<width>[,<height>]] [<sigma>]",
+	description = "Advanced version of //smooth from we_env. Convolves over the defined region with the given kernel. Possible kernels: box, pascal, gaussian. The width & height (if specified) must be odd integers. If the height is not specified, it defaults to the width. gaussian should give the smoothest result, but the width & height must be identical. The sigma value is only applicable to gaussian kernels.",
+	privs = { worldedit = true },
+	require_pos = 2,
+	parse = function(params_text)
+		if not params_text or params_text == "" then
+			return false, "Error: No arguments specified"
+		end
+		
+		local parts = worldeditadditions.split(params_text, "%s+", false)
+		
+		local kernel_name = "gaussian"
+		local width = 5
+		local height = 5
+		local sigma = nil
+		
+		if #parts >= 1 then
+			kernel_name = parts[1]
+		end
+		if #parts >= 2 then
+			local parts_dimension = worldeditadditions.split(parts[2], ",%s*", false)
+			width = tonumber(parts[1])
+			if not width then
+				return false, "Error: Invalid width (it must be a positive odd integer)."
+			end
+			if #parts_dimension >= 2 then
+				height = tonumber(parts[2])
+				if not height then
+					return false, "Error: Invalid height (it must be a positive odd integer)."
+				end
+			else
+				height = width
+			end
+		end
+		if #parts >= 3 then
+			sigma = tonumber(parts[3])
+			if not sigma then
+				return false, "Error: Invalid sigma value (it must be a valid number - floating point numbers are allowed)"
+			end
+		end
+		
+		return true, kernel_name, math.floor(width), math.floor(height), sigma
+	end,
+	nodes_needed = function(name)
+		return worldedit.volume(worldedit.pos1[name], worldedit.pos2[name])
+	end,
+	func = function(kernel_name, kernel_width, kernel_height, sigma)
+		local start_time = os.clock()
+		
+		local success, kernel = worldeditadditions.get_conv_kernel(kernel_name, kernel_width, kernel_height, sigma)
+		if not success then return success, kernel end
+		
+		local kernel_size = {}
+		kernel_size[0] = kernel_height
+		kernel_size[1] = kernel_width
+		
+		local success, stats = worldeditadditions.convolve(
+			worldedit.pos1[name], worldedit.pos2[name],
+			kernel, kernel_size
+		)
+		
+		local time_taken = os.clock() - start_time
+		
+		
+		minetest.log("action", name.." used //convolve at "..worldeditadditions.vector.tostring(worldedit.pos1[name]).." - "..worldeditadditions.vector.tostring(worldedit.pos2[name])..", adding "..stats.added.." nodes and removing "..stats.removed.." nodes in "..time_taken.."s")
+		return true, "Added "..stats.added.." and removed "..stats.removed.." nodes"
+	end
+})

worldeditadditions_commands/init.lua

@@ -24,6 +24,7 @@ dofile(we_c.modpath.."/commands/torus.lua")
 dofile(we_c.modpath.."/commands/walls.lua")
 dofile(we_c.modpath.."/commands/maze.lua")
 dofile(we_c.modpath.."/commands/replacemix.lua")
+dofile(we_c.modpath.."/commands/convolve.lua")
 
 dofile(we_c.modpath.."/commands/count.lua")
 
@@ -31,5 +32,5 @@ dofile(we_c.modpath.."/commands/count.lua")
 if minetest.get_modpath("bonemeal") then
 	dofile(we_c.modpath.."/commands/bonemeal.lua")
 else
-	minetest.log("action", "[WorldEditAdditions] bonemeal mod not detected: //bonemeal command not registered")
+	minetest.log("action", "[WorldEditAdditions] bonemeal mod not detected: //bonemeal command not registered (if you see this message and you're using an alternative mod that provides bonemeal, please get in touch by opening an issue)")
 end