added axis and dir checks

worldeditadditions/lib/selection/selection.lua

@@ -8,9 +8,9 @@
 local selection = {}
 
 --- Additively adds a point to the current selection or
---		makes a selection from the provided point.
+-- makes a selection from the provided point.
--- @param name	string	Player name.
+-- @param	name	string	Player name.
--- @param pos	vector	The position to include.
+-- @param	pos	vector	The position to include.
 function selection.add_point(name, pos)
 	if pos ~= nil then
 		-- print("[set_pos1]", name, "("..pos.x..", "..pos.y..", "..pos.z..")")
@@ -36,7 +36,7 @@ function selection.add_point(name, pos)
 end
 
 --- Clears current selection.
--- @param name	string	Player name.
+-- @param	name	string	Player name.
 function selection.clear_points(name)
 	worldedit.pos1[name] = nil
 	worldedit.pos2[name] = nil
@@ -46,4 +46,23 @@ function selection.clear_points(name)
 	worldedit.player_notify(name, "Region cleared")
 end
 
+--- Checks if a string is a valid axis.
+-- @param	str	string	String to check (be sure to remove any + or -).
+-- @param	hv	bool	Include "h" (general horizontal) and "v" (general vertical).
+-- @return	bool	If string is a valid axis then true.
+function selection.check_axis(str,hv)
+	if hv then
+		return (str == "x" or str == "y" or str == "z" or str == "h" or str == "v")
+	else
+		return (str == "x" or str == "y" or str == "z")
+	end
+end
+
+--- Checks if a string is a valid dir.
+-- @param	str	string	String to check (be sure to remove any + or -).
+-- @return	bool	If string is a valid dir then true.
+function selection.check_dir(str)
+	return (str == "front" or str == "back" or str == "left" or str == "right" or str == "up" or str == "down")
+end
+
 return selection