From: Mikko Rasa <tdb@tdb.fi>
Date: Tue, 11 Jun 2019 21:07:38 +0000 (+0300)
Subject: Fix a data corruption issue in mesh exporter
X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=commitdiff_plain;h=aa1ef522b3b2bdde8f005878fed6668f52b8d949

Fix a data corruption issue in mesh exporter

Apparently mathutils.Vector can refer to external data, in this case the
mesh's UV coordinates, which gets deleted with the mesh.  Copy the values
to make sure they are retained.
---

diff --git a/blender/io_mspgl/mesh.py b/blender/io_mspgl/mesh.py
index 125bc5bb..91648d28 100644
--- a/blender/io_mspgl/mesh.py
+++ b/blender/io_mspgl/mesh.py
@@ -61,8 +61,8 @@ class Vertex:
 			self.tan = None
 			self.bino = None
 		self.index = vertex.index
-		self.co = vertex.co
-		self.normal = vertex.normal
+		self.co = mathutils.Vector(vertex.co)
+		self.normal = mathutils.Vector(vertex.normal)
 		self.flag = False
 		self.edges = []
 		self.faces = []
@@ -148,7 +148,7 @@ class UvLayer:
 		else:
 			self._layer = arg
 			self.name = arg.name
-			self.uvs = [d.uv for d in self.data]
+			self.uvs = [mathutils.Vector(d.uv) for d in self.data]
 
 		self.unit = None
 		self.hidden = False