Objects: make evaluated data runtime storage usable for types other than mesh

This is in preparation of new object types. This only changes mesh_eval, we
may do the same for mesh_deform_eval and other areas in the future if there is
a need for it.

This previously caused a bug in T74283, that should be fixed now.

Differential Revision: https://developer.blender.org/D6695

1 files changed, 4 insertions, 2 deletions

diff --git a/source/blender/alembic/intern/abc_writer_mball.cc b/source/blender/alembic/intern/abc_writer_mball.cc
index aa08146c6e2..cc0775bd537 100644
--- a/source/blender/alembic/intern/abc_writer_mball.cc
+++ b/source/blender/alembic/intern/abc_writer_mball.cc
@@ -30,6 +30,7 @@ extern "C" {
 #include "BKE_lib_id.h"
 #include "BKE_mball.h"
 #include "BKE_mesh.h"
+#include "BKE_object.h"
 
 #include "BLI_utildefines.h"
 }
@@ -55,10 +56,11 @@ bool AbcMBallWriter::isAnimated() const
 
 Mesh *AbcMBallWriter::getEvaluatedMesh(Scene * /*scene_eval*/, Object *ob_eval, bool &r_needsfree)
 {
-  if (ob_eval->runtime.mesh_eval != NULL) {
+  Mesh *mesh_eval = BKE_object_get_evaluated_mesh(ob_eval);
+  if (mesh_eval != NULL) {
     /* Mesh_eval only exists when generative modifiers are in use. */
     r_needsfree = false;
-    return ob_eval->runtime.mesh_eval;
+    return mesh_eval;
   }
   r_needsfree = true;