diff options
| -rw-r--r-- | source/blender/blenkernel/intern/DerivedMesh.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/source/blender/blenkernel/intern/DerivedMesh.c b/source/blender/blenkernel/intern/DerivedMesh.c index 5f759c61bcb..8168817491f 100644 --- a/source/blender/blenkernel/intern/DerivedMesh.c +++ b/source/blender/blenkernel/intern/DerivedMesh.c @@ -3474,13 +3474,17 @@ void DM_calc_loop_tangents( /* Update active layer index */ uv_index = CustomData_get_layer_index_n(&dm->loopData, CD_MLOOPUV, act_uv_n); - tan_index = CustomData_get_named_layer_index(&dm->loopData, CD_TANGENT, dm->loopData.layers[uv_index].name); - CustomData_set_layer_active_index(&dm->loopData, CD_TANGENT, tan_index); + if (uv_index != -1) { + tan_index = CustomData_get_named_layer_index(&dm->loopData, CD_TANGENT, dm->loopData.layers[uv_index].name); + CustomData_set_layer_active_index(&dm->loopData, CD_TANGENT, tan_index); + } /* Update render layer index */ uv_index = CustomData_get_layer_index_n(&dm->loopData, CD_MLOOPUV, ren_uv_n); - tan_index = CustomData_get_named_layer_index(&dm->loopData, CD_TANGENT, dm->loopData.layers[uv_index].name); - CustomData_set_layer_render_index(&dm->loopData, CD_TANGENT, tan_index); + if (uv_index != -1) { + tan_index = CustomData_get_named_layer_index(&dm->loopData, CD_TANGENT, dm->loopData.layers[uv_index].name); + CustomData_set_layer_render_index(&dm->loopData, CD_TANGENT, tan_index); + } } } |