[Bf-blender-cvs] [0867c2401ba] temp-T96710-pbvh-pixels: Fix T97035: crash transferring face corner data
Brecht Van Lommel
noreply at git.blender.org
Fri Apr 8 11:07:49 CEST 2022
Commit: 0867c2401ba1a8055f1696d825d19103d84d79b7
Author: Brecht Van Lommel
Date: Wed Apr 6 20:29:28 2022 +0200
Branches: temp-T96710-pbvh-pixels
https://developer.blender.org/rB0867c2401ba1a8055f1696d825d19103d84d79b7
Fix T97035: crash transferring face corner data
The mechanism to instance meshes when there are no modifiers did not take
into account that modifiers might get re-evaluated from an operator that
requests loop normals. Now check for that case and no longer use the
instance then.
In the future, a better solution may be to compute loop normals on demand
as is already done for poly and vertex normals, but that would be a big
change.
Differential Revision: https://developer.blender.org/D14579
===================================================================
M source/blender/blenkernel/intern/DerivedMesh.cc
===================================================================
diff --git a/source/blender/blenkernel/intern/DerivedMesh.cc b/source/blender/blenkernel/intern/DerivedMesh.cc
index 904a43a7c28..604cc3682f0 100644
--- a/source/blender/blenkernel/intern/DerivedMesh.cc
+++ b/source/blender/blenkernel/intern/DerivedMesh.cc
@@ -606,6 +606,19 @@ static void add_orco_mesh(Object *ob, BMEditMesh *em, Mesh *mesh, Mesh *mesh_orc
}
}
+static bool mesh_has_modifier_final_normals(const Mesh *mesh_input,
+ const CustomData_MeshMasks *final_datamask,
+ Mesh *mesh_final)
+{
+ /* Test if mesh has the required loop normals, in case an additional modifier
+ * evaluation from another instance or from an operator requests it but the
+ * initial normals were not loop normals. */
+ const bool do_loop_normals = ((mesh_input->flag & ME_AUTOSMOOTH) != 0 ||
+ (final_datamask->lmask & CD_MASK_NORMAL) != 0);
+
+ return (!do_loop_normals || CustomData_has_layer(&mesh_final->ldata, CD_NORMAL));
+}
+
static void mesh_calc_modifier_final_normals(const Mesh *mesh_input,
const CustomData_MeshMasks *final_datamask,
const bool sculpt_dyntopo,
@@ -1190,7 +1203,8 @@ static void mesh_calc_modifiers(struct Depsgraph *depsgraph,
BLI_assert(runtime->eval_mutex != nullptr);
BLI_mutex_lock((ThreadMutex *)runtime->eval_mutex);
if (runtime->mesh_eval == nullptr) {
- /* Isolate since computing normals is multithreaded and we are holding a lock. */
+ /* Not yet finalized by any instance, do it now
+ * Isolate since computing normals is multithreaded and we are holding a lock. */
blender::threading::isolate_task([&] {
mesh_final = BKE_mesh_copy_for_eval(mesh_input, true);
mesh_calc_modifier_final_normals(
@@ -1199,9 +1213,23 @@ static void mesh_calc_modifiers(struct Depsgraph *depsgraph,
runtime->mesh_eval = mesh_final;
});
}
+ else {
+ /* Already finalized by another instance, reuse. */
+ mesh_final = runtime->mesh_eval;
+ }
BLI_mutex_unlock((ThreadMutex *)runtime->eval_mutex);
}
- mesh_final = runtime->mesh_eval;
+ else if (!mesh_has_modifier_final_normals(mesh_input, &final_datamask, runtime->mesh_eval)) {
+ /* Modifier stack was (re-)evaluated with a request for additional normals
+ * different than the instanced mesh, can't instance anymore now. */
+ mesh_final = BKE_mesh_copy_for_eval(mesh_input, true);
+ mesh_calc_modifier_final_normals(mesh_input, &final_datamask, sculpt_dyntopo, mesh_final);
+ mesh_calc_finalize(mesh_input, mesh_final);
+ }
+ else {
+ /* Already finalized by another instance, reuse. */
+ mesh_final = runtime->mesh_eval;
+ }
}
if (is_own_mesh) {
More information about the Bf-blender-cvs
mailing list