bug#47463: closed (Blender: Voxel remesher failed to create mesh)

[GNU bug Tracking System]

Your message dated Wed, 21 Apr 2021 17:30:08 +0000
with message-id 
<n3nmlP9671M7WCVgwf9KsYTzMGZXaovWYR82Jj5mfIFYBV-uxvdHq2Jz9AAGQVIAy3s9RJHiHsKtYHnRSWJOqNMpXakgVlwfWTZ2iV77LyQ=@elenq.tech>
and subject line Fixed by 47467
has caused the debbugs.gnu.org bug report #47463,
regarding Blender: Voxel remesher failed to create mesh
to be marked as done.

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47463: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=47463
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> --- Begin Message ---
>
>
>
> Subject: 
>
> Blender: Voxel remesher failed to create mesh
>
>
>
>
> Date: 
>
> Mon, 29 Mar 2021 09:55:02 +0000
>
>
>
>
> Hi,
>
> I found an issue with blender. Our packaged version it's not able to run the
> Voxel Remesher, I think because OpenVBD[^1] is not included in our package.
>
> Every time I use the Voxel Remesh tool it says:
> "Voxel remesher failed to create mesh"
>
> But the Quadriflow remesher works fine.
>
> I searched a little bit in the code and I found the following:
>
>
> Here is where the error message appears (object_remesh.c:147):
>
> ``` c
>   new_mesh = BKE_mesh_remesh_voxel_to_mesh_nomain(
>       mesh, mesh->remesh_voxel_size, mesh->remesh_voxel_adaptivity, isovalue);
>
>   if (!new_mesh) {
>     BKE_report(op->reports, RPT_ERROR, "Voxel remesher failed to create mesh");
>     return OPERATOR_CANCELLED;
>   }
> ```
>
> So it means the `new_mesh` is not created. Checking the definition of the
> `BKE_mesh_remesh_voxel_to_mesh_nomain` function we get this
> (mesh_remesh_voxel.c:296):
>
>
> ``` c
> Mesh *BKE_mesh_remesh_voxel_to_mesh_nomain(Mesh *mesh,
>                                            float voxel_size,
>                                            float adaptivity,
>                                            float isovalue)
> {
>   Mesh *new_mesh = NULL;
> #ifdef WITH_OPENVDB
>   struct OpenVDBLevelSet *level_set;
>   struct OpenVDBTransform *xform = OpenVDBTransform_create();
>   OpenVDBTransform_create_linear_transform(xform, (double)voxel_size);
>   level_set = BKE_mesh_remesh_voxel_ovdb_mesh_to_level_set_create(mesh, xform);
>   new_mesh = BKE_mesh_remesh_voxel_ovdb_volume_to_mesh_nomain(
>       level_set, (double)isovalue, (double)adaptivity, false);
>   OpenVDBLevelSet_free(level_set);
>   OpenVDBTransform_free(xform);
> #else
>   UNUSED_VARS(mesh, voxel_size, adaptivity, isovalue);
> #endif
>   return new_mesh;
> }
> ```
>
> I also checked blender package and I doesn't look like it includes OpenVDB, so
> this makes sense.
>
> As this is a powerful tool and enables much better workflows for sculpting I
> think we should add it.
>
> I'll try to add it myself, if you are ok with that.
>
> Best,
>
> Ekaitz
>
>
> [^1]: https://www.openvdb.org/
>
>
>
>
> --- End Message ---
> --- Begin Message ---
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> Subject: 
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> Fixed by 47467
>
>
>
>
> Date: 
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> Wed, 21 Apr 2021 17:30:08 +0000
>
>
>
>
> Empty Message
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>
> --- End Message ---