Changed operation order, normalise vectors before computing normals

d3/model/basemodel.py

@@ -218,6 +218,8 @@ class ModelParser:
             for face in part.faces:
                 v1 = Vertex.from_points(self.vertices[face.a.vertex], self.vertices[face.b.vertex])
                 v2 = Vertex.from_points(self.vertices[face.a.vertex], self.vertices[face.c.vertex])
+                v1.normalize()
+                v2.normalize()
                 cross = Vertex.cross_product(v1, v2)
                 self.normals[face.a.vertex] += cross
                 self.normals[face.b.vertex] += cross

d3/model/formats/ply.py

@@ -189,6 +189,9 @@ class PLY_ASCII_ContentParser:
 
     def parse_line(self, string):
 
+        if string == '':
+            return
+
         if self.current_element is None:
             self.current_element = self.parent.elements[0]