[Bf-blender-cvs] [96a47af413a] blender-v3.2-release: Fix T98546: Crash with multires bake and zero levels
Hans Goudey
noreply at git.blender.org
Thu Jun 2 17:46:42 CEST 2022
Commit: 96a47af413a8055f50b9989905922588494d1653
Author: Hans Goudey
Date: Thu Jun 2 17:46:38 2022 +0200
Branches: blender-v3.2-release
https://developer.blender.org/rB96a47af413a8055f50b9989905922588494d1653
Fix T98546: Crash with multires bake and zero levels
The problem was that copying a `CDDerivedMesh` (`CDDM_copy`) doesn't
copy the `vert_normals` reference that it takes from a mesh. Since this
entire area is almost completely broken anyway (mainly in terms of
ownership handling), for now we can just avoid copying the `DerivedMesh`
in the zero levels case.
Longer term, this area should be refactored to remove `DerivedMesh`
and use the newer subdivision evaluation system.
Differential Revision: https://developer.blender.org/D15099
===================================================================
M source/blender/editors/object/object_bake.c
===================================================================
diff --git a/source/blender/editors/object/object_bake.c b/source/blender/editors/object/object_bake.c
index 1483c24ac70..effbde41c38 100644
--- a/source/blender/editors/object/object_bake.c
+++ b/source/blender/editors/object/object_bake.c
@@ -220,22 +220,22 @@ static DerivedMesh *multiresbake_create_loresdm(Scene *scene, Object *ob, int *l
MultiresModifierData *mmd = get_multires_modifier(scene, ob, 0);
Mesh *me = (Mesh *)ob->data;
MultiresModifierData tmp_mmd = *mmd;
- DerivedMesh *cddm = CDDM_from_mesh(me);
- DM_set_only_copy(cddm, &CD_MASK_BAREMESH);
+ *lvl = mmd->lvl;
if (mmd->lvl == 0) {
- dm = CDDM_copy(cddm);
- }
- else {
- tmp_mmd.lvl = mmd->lvl;
- tmp_mmd.sculptlvl = mmd->lvl;
- dm = multires_make_derived_from_derived(cddm, &tmp_mmd, scene, ob, 0);
+ DerivedMesh *cddm = CDDM_from_mesh(me);
+ DM_set_only_copy(cddm, &CD_MASK_BAREMESH);
+ return cddm;
}
- cddm->release(cddm);
+ DerivedMesh *cddm = CDDM_from_mesh(me);
+ DM_set_only_copy(cddm, &CD_MASK_BAREMESH);
+ tmp_mmd.lvl = mmd->lvl;
+ tmp_mmd.sculptlvl = mmd->lvl;
+ dm = multires_make_derived_from_derived(cddm, &tmp_mmd, scene, ob, 0);
- *lvl = mmd->lvl;
+ cddm->release(cddm);
return dm;
}
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