Add access to UVs from python, patch python unwrap scripts to work wtih ngons

release/scripts/modules/bpy_extras/mesh_utils.py

@@ -140,8 +140,7 @@ def edge_loops_from_faces(mesh, faces=None, seams=()):
     edges = {}
 
     for f in faces:
-#        if len(f) == 4:
-        if f.vertices_raw[3] != 0:
+        if len(f.vertices) == 4:
             edge_keys = f.edge_keys
             for i, edkey in enumerate(f.edge_keys):
                 edges.setdefault(edkey, []).append(edge_keys[OTHER_INDEX[i]])

release/scripts/modules/bpy_types.py

@@ -442,6 +442,20 @@ class MeshFace(StructRNA):
                     ord_ind(verts[3], verts[0]),
                     )
 
+class MeshPolygon(StructRNA):
+    __slots__ = ()
+
+    @property
+    def edge_keys(self):
+        verts = self.vertices[:]
+        vlen = len(self.vertices)
+        return [ord_ind(verts[i], verts[(i+1) % vlen]) for i in range(vlen)]
+
+    @property
+    def loops(self):
+        start = self.loop_start
+        end = start + self.loop_total
+        return range(start, end)
 
 class Text(bpy_types.ID):
     __slots__ = ()