X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=blender%2Fio_mesh_mspgl%2Fmesh.py;fp=blender%2Fio_mesh_mspgl%2Fmesh.py;h=d674dbdb24975c25c2ca9fafca7e61b3e4a5d2cb;hb=ea6445c234d1db93e7c62cce228e94b2b652c1c5;hp=8b3ad37052a62eba8d03237a5386a43cf8775e22;hpb=bd479bfbe3aa6096e9a27b4b766d56b231b387c4;p=libs%2Fgl.git

diff --git a/blender/io_mesh_mspgl/mesh.py b/blender/io_mesh_mspgl/mesh.py
index 8b3ad370..d674dbdb 100644
--- a/blender/io_mesh_mspgl/mesh.py
+++ b/blender/io_mesh_mspgl/mesh.py
@@ -90,6 +90,10 @@ class Face:
 				return e
 		raise KeyError("No edge %s"%(key,))
 
+	def get_neighbors(self):
+		neighbors = [e.other_face(f) for e in self.edges]
+		return list(filter(bool, neighbors))
+
 
 class Line:
 	def __init__(self, e):
@@ -358,6 +362,7 @@ class Mesh:
 				v.bino.normalize()
 
 	def create_strip(self, face, max_len):
+		# Find an edge with another unused face next to it
 		edge = None
 		for e in face.edges:
 			other = e.other_face(face)
@@ -368,6 +373,8 @@ class Mesh:
 		if not edge:
 			return None
 
+		# Add initial vertices so that we'll complete the edge on the first
+		# iteration
 		vertices = face.pivot_vertices(*edge.vertices)
 		if len(vertices)==3:
 			result = [vertices[-1], vertices[0]]
@@ -375,10 +382,13 @@ class Mesh:
 			result = [vertices[-2], vertices[-1]]
 
 		while 1:
+			face.flag = True
+
 			vertices = face.pivot_vertices(*result[-2:])
 			k = len(result)%2
 
-			face.flag = True
+			# Quads need special handling because the winding of every other
+			# triangle in the strip is reversed
 			if len(vertices)==4 and not k:
 				result.append(vertices[3])
 			result.append(vertices[2])
@@ -388,11 +398,10 @@ class Mesh:
 			if len(result)>=max_len:
 				break
 
+			# Hop over the last edge
 			edge = face.get_edge(*result[-2:])
-
-			next = edge.other_face(face)
-			if not next or next.flag:
+			face = edge.other_face(face)
+			if not face or face.flag:
 				break
-			face = next
 
 		return result