apply to vector component

pgfw/Vector.py

@@ -48,6 +48,10 @@ class Vector(list):
         self.y *= other
         return self
 
+    def apply_to_components(self, function):
+        self.x = function(self.x)
+        self.y = function(self.y)
+
     def place(self, x=None, y=None):
         if x is not None:
             self.x = x