[Bf-blender-cvs] [35dc587fd6f] soc-2020-io-performance: Check if there is any material to write.

[Ankit Meel]

Commit: 35dc587fd6fdef33260934ead95359ee66ff092e
Author: Ankit Meel
Date:   Mon Jun 29 20:57:17 2020 +0530
Branches: soc-2020-io-performance
https://developer.blender.org/rB35dc587fd6fdef33260934ead95359ee66ff092e

Check if there is any material to write.

===================================================================

M	source/blender/io/wavefront_obj/intern/wavefront_obj_file_handler.cc

===================================================================

diff --git a/source/blender/io/wavefront_obj/intern/wavefront_obj_file_handler.cc b/source/blender/io/wavefront_obj/intern/wavefront_obj_file_handler.cc
index 3de2f0d3cfa..6afb4cf4ac3 100644
--- a/source/blender/io/wavefront_obj/intern/wavefront_obj_file_handler.cc
+++ b/source/blender/io/wavefront_obj/intern/wavefront_obj_file_handler.cc
@@ -184,7 +184,7 @@ void OBJWriter::write_poly_normals(OBJMesh &obj_mesh_data)
  */
 void OBJWriter::write_poly_material(short &last_face_mat_nr, OBJMesh &obj_mesh_data, short mat_nr)
 {
-  if (_export_params->export_materials == false) {
+  if (_export_params->export_materials == false || !(obj_mesh_data.tot_col() > 0)) {
     return;
   }
   /* Whenever a face with a new material is encountered, write its material and group, otherwise