Handling of input in different forms enabled further

lmgeo/toolbox/vectorlib.py

@@ -47,8 +47,12 @@ class Triangle(object):
             assert len(self.__points) == 3, "Triangle must have 3 corners!" 
             
         # Calculate the centroid by averaging coordinates
-        xc = [pt[0] for pt in self.__points] / 3
-        yc = [pt[1] for pt in self.__points] / 3
+        if hasattr(self.__points[0], "__len__"):
+            xc = sum([pt[0] for pt in self.__points]) / 3
+            yc = sum([pt[1] for pt in self.__points]) / 3
+        elif hasattr(self.__points[0], "x") and hasattr(self.__points[0], "y"):
+            xc = sum([pt.x for pt in self.__points]) / 3
+            yc = sum([pt.y for pt in self.__points]) / 3
         return xc, yc
 
 # TODO: develop this class