From: Mikko Rasa <tdb@tdb.fi>
Date: Fri, 17 Apr 2015 20:44:06 +0000 (+0300)
Subject: Raise an exception if attempting to export a mesh with ngons
X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=commitdiff_plain;h=d7d791f5a3e684559f34be7730477ab5127f9ed6

Raise an exception if attempting to export a mesh with ngons

Otherwise there will be a much more confusing errors down the line
---

diff --git a/blender/io_mspgl/mesh.py b/blender/io_mspgl/mesh.py
index 3ad3cecc..04b2b51f 100644
--- a/blender/io_mspgl/mesh.py
+++ b/blender/io_mspgl/mesh.py
@@ -148,6 +148,8 @@ class Mesh:
 		self.assign_texture_units()
 
 		for f in self.faces:
+			if len(f.vertices)>4:
+				raise ValueError("Ngons are not supported")
 			f.vertices = [self.vertices[i] for i in f.vertices]
 			for v in f.vertices:
 				v.faces.append(f)