From: Mikko Rasa <tdb@tdb.fi>
Date: Sun, 28 Mar 2021 09:47:29 +0000 (+0300)
Subject: Fix exporting of materials without any textures
X-Git-Url: http://git.tdb.fi/?a=commitdiff_plain;h=658df70cfc632e9f931b178ad7fd176c923b63a9;p=libs%2Fgl.git

Fix exporting of materials without any textures

If a generator expression produces no items, trying to access __next__()
produces a StopIteration exception.  It's better to create a list so we
can check if it's empty.
---

diff --git a/blender/io_mspgl/export_material.py b/blender/io_mspgl/export_material.py
index d69389cc..4d2fe074 100644
--- a/blender/io_mspgl/export_material.py
+++ b/blender/io_mspgl/export_material.py
@@ -73,11 +73,11 @@ class MaterialExporter:
 			if ss:
 				st.sub.append(ss)
 		if self.use_textures:
-			first_tex = (p.texture for p in material.properties if p.texture).__next__()
-			if first_tex and not first_tex.default_filter:
+			textures = [p.texture for p in material.properties if p.texture]
+			if textures and not textures[0].default_filter:
 				from .export_texture import SamplerExporter
 				sampler_export = SamplerExporter()
-				st.sub.append(mat_res.create_reference_statement("sampler", resources[sampler_export.get_sampler_name(first_tex)]))
+				st.sub.append(mat_res.create_reference_statement("sampler", resources[sampler_export.get_sampler_name(textures[0])]))
 		mat_res.statements.append(st)
 
 		return mat_res