refactor code for mantainability and reusability. Start of chat command refactor. Implement /outset.

worldedit_commands/cuboid.lua

@@ -0,0 +1,95 @@
+minetest.register_chatcommand("/outset", {
+	params = "<amount> [h|v]",
+	description = "outset the selection",
+	privs = {worldedit=true},
+	func = function(name, param)
+		local find, _, amount, dir = param:find("^(%d+)[%s+]?([hv]?)$")
+		
+		if find == nil then
+			return false, "invalid usage: " .. param
+		end
+		
+		local pos1 = worldedit.pos1[name]
+		local pos2 = worldedit.pos2[name]
+		
+		if pos1 == nil or pos2 == nil then
+			return false, 
+				"Undefined region. Region must be defined beforehand."
+		end
+		
+		if dir == "" then
+			assert(worldedit.cuboid_volumetricexpand(name, amount))
+		elseif dir == "h" then
+			assert(worldedit.cuboid_linealexpand(name, 'x', 1, amount))
+			assert(worldedit.cuboid_linealexpand(name, 'x', -1, amount))
+			assert(worldedit.cuboid_linealexpand(name, 'z', 1, amount))
+			assert(worldedit.cuboid_linealexpand(name, 'z', -1, amount))
+		elseif dir == "v" then
+			assert(worldedit.cuboid_linealexpand(name, 'y', 1, amount))
+			assert(worldedit.cuboid_linealexpand(name, 'y', -1, amount))
+		else
+			return false, "Unknown error"
+		end
+		
+		worldedit.marker_update(name)
+		return true, "Region outset by " .. amount .. " blocks"
+      end,
+  }
+)
+
+
+minetest.register_chatcommand(
+  "/shift",
+  {
+      params = "<amount> [up|down|left|right|front|back]",
+      description = "Moves the selection region. Does not move contents.",
+      privs = {worldedit=true},
+      func = function(name, param)
+	local pos1 = worldedit.pos1[name]
+	local pos2 = worldedit.pos2[name]
+	local find, _, amount, direction = param:find("(%d+)%s*(%l*)")
+
+	if find == nil then
+	    worldedit.player_notify(name, "invalid usage: " .. param)
+	    return
+	end
+	
+	if pos1 == nil or pos2 == nil then
+	    worldedit.player_notify(name, 
+	      "Undefined region. Region must be defined beforehand.")
+	    return
+	end
+
+	
+      end,
+  }
+)
+
+minetest.register_chatcommand(
+  "/expand",
+  {
+      params = "<amount> [reverse-amount] [up|down|left|right|front|back]",
+      description = "expand the selection in one or two directions at once",
+      privs = {worldedit=true},
+      func = function(name, param)
+	local find, _, amount, arg2, arg3 = param:find("(%d+)%s*(%w*)%s*(%l*)")
+
+	if find == nil then
+	    worldedit.player_notify(name, "invalid use: " .. param)
+	    return
+	end
+
+	if worldedit.pos1[name] == nil or worldedit.pos2[name] == nil then
+	    worldedit.player_notify(name, 
+	      "Undefined region. Region must be defined beforehand.")
+	    return
+	end
+
+	
+      end,
+  }
+)
+
+
+dofile(minetest.get_modpath("worldedit_commands") .. "/cuboidapi.lua")
+