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Fix: Use evaluated materials in OBJ exporter 

Since 1a81d268a1, materials on object data can change during
evaluation. But a different function is necessary to retrieve materials
taking that into account.

Solves part of T96721.

Differential Revision: https://developer.blender.org/D15595
This commit is contained in:
Hans Goudey 2022-08-02 09:49:51 -05:00
parent e4dd644d6b
commit d3eef4d22a
Notes: blender-bot 2023-05-31 04:43:10 +02:00 
Referenced by issue blender/blender-addons#96721, Exporters (add-ons and compiled) need to be updated to support new fully dynamic material assignment possible from Geometry Nodes
1 changed files with 2 additions and 2 deletions
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4
source/blender/io/wavefront_obj/exporter/obj_export_mesh.cc
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@ -219,13 +219,13 @@ void OBJMesh::calc_poly_order()
const Material *OBJMesh::get_object_material(const int16_t mat_nr) const
{
/**
* The const_cast is safe here because BKE_object_material_get won't change the object
* The const_cast is safe here because #BKE_object_material_get_eval won't change the object
* but it is a big can of worms to fix the declaration of that function right now.
*
* The call uses "+ 1" as material getter needs one-based indices.
*/
Object *obj = const_cast<Object *>(&export_object_eval_);
const Material *r_mat = BKE_object_material_get(obj, mat_nr + 1);
const Material *r_mat = BKE_object_material_get_eval(obj, mat_nr + 1);
return r_mat;
}