X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=blender%2Fio_mspgl%2Fmesh.py;h=c3767bd9f18884718941977115da2d66f3a1a756;hp=08f0bb4ac814ea196d1411de15720c0ff17eb993;hb=e55b081c9b9927168530fdf7fafcae5aed295569;hpb=09c8337778f6d2e595016d02023297d958cf6316

diff --git a/blender/io_mspgl/mesh.py b/blender/io_mspgl/mesh.py
index 08f0bb4a..c3767bd9 100644
--- a/blender/io_mspgl/mesh.py
+++ b/blender/io_mspgl/mesh.py
@@ -296,7 +296,7 @@ class Mesh:
 
 			normals = []
 			for j in range(nverts):
-				normals.append(edge_vecs[j].cross(edge_vecs[j-1]).normalized())
+				normals.append(edge_vecs[j-1].cross(edge_vecs[j]).normalized())
 
 			# Check which diagonal results in a flatter triangulation
 			flatness1 = normals[0].dot(normals[2])
@@ -333,6 +333,10 @@ class Mesh:
 			else:
 				nf.edges = [f.edges[1], f.edges[2], ne]
 				f.edges = [f.edges[0], ne, f.edges[3]]
+			for e in nf.edges:
+				if e!=ne:
+					e.faces.remove(f)
+					e.faces.append(nf)
 
 			f.normal = normals[1-cut_index]
 			nf.normal = normals[3-cut_index]