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GPv3: Material Selection node #113827

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Dalai Felinto merged 4 commits from dfelinto/blender:grease-nodes-material-selection into main 2023-10-17 19:52:54 +02:00
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Dalai Felinto commented 2023-10-17 12:57:25 +02:00
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Part of #113602.

Part of #113602.
Dalai Felinto requested review from Falk David 2023-10-17 12:57:42 +02:00
Dalai Felinto requested review from Hans Goudey 2023-10-17 12:57:42 +02:00
Dalai Felinto force-pushed grease-nodes-material-selection from e05406aee7 to 4f02b2b4fd 2023-10-17 13:01:16 +02:00 Compare
Dalai Felinto commented 2023-10-17 13:07:18 +02:00
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Note that I didn't know how to best handle
const IndexMask domain_mask = (domain == ATTR_DOMAIN_FACE) ? mask : IndexMask(mesh->faces_num);, so it needs a closer eye

Note that I didn't know how to best handle `const IndexMask domain_mask = (domain == ATTR_DOMAIN_FACE) ? mask : IndexMask(mesh->faces_num);`, so it needs a closer eye
Hans Goudey commented 2023-10-17 18:49:23 +02:00
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That statement is an optimization to avoid calculating unnecessary values. If domain interpolation is necessary though, it's hard to know which face values will be needed, so we just calculate all of them. I think it can become const IndexMask domain_mask = (domain == ATTR_DOMAIN_CURVE) ? mask : IndexMask(curves.curves_num()); in this case.

That statement is an optimization to avoid calculating unnecessary values. If domain interpolation is necessary though, it's hard to know which _face_ values will be needed, so we just calculate all of them. I think it can become `const IndexMask domain_mask = (domain == ATTR_DOMAIN_CURVE) ? mask : IndexMask(curves.curves_num());` in this case.
Hans Goudey requested changes 2023-10-17 18:51:49 +02:00
source/blender/nodes/geometry/nodes/node_geo_material_selection.cc Outdated
@ -55,6 +57,40 @@ static VArray<bool> select_mesh_faces_by_material(const Mesh &mesh,
return VArray<bool>::ForContainer(std::move(face_selection));
}
static VArray<bool> select_grease_pencil_by_material(const GreasePencil &grease_pencil,
Hans Goudey commented 2023-10-17 18:51:31 +02:00
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It would be nice to see this de-duplicated with the mesh implementation. I think the arguments would be:

  • VArray<int> material_indices
  • const Span<Material *> materials
  • Material *material

And beyond that everything would be the same

It would be nice to see this de-duplicated with the mesh implementation. I think the arguments would be: - `VArray<int> material_indices` - `const Span<Material *> materials` - `Material *material` And beyond that everything would be the same
dfelinto marked this conversation as resolved
Dalai Felinto force-pushed grease-nodes-material-selection from 4f02b2b4fd to c353f676db 2023-10-17 19:37:33 +02:00 Compare
Dalai Felinto requested review from Hans Goudey 2023-10-17 19:37:39 +02:00
Hans Goudey approved these changes 2023-10-17 19:43:22 +02:00
Hans Goudey left a comment
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One more deduplication opportunity might be passing AttributeAccessor and the domain, so the shared function could retrieve the material indices and the domain size (with (attributes.domain_size(domain)). That sounds worth it actually. But doesn't need another round of review. Thanks!

One more deduplication opportunity might be passing `AttributeAccessor` and the domain, so the shared function could retrieve the material indices and the domain size (with (`attributes.domain_size(domain)`). That sounds worth it actually. But doesn't need another round of review. Thanks!
Dalai Felinto added 1 commit 2023-10-17 19:52:24 +02:00
Dalai Felinto merged commit 42f71c9dca into main 2023-10-17 19:52:54 +02:00
Dalai Felinto deleted branch grease-nodes-material-selection 2023-10-17 19:52:55 +02:00
Falk David approved these changes 2023-10-17 19:54:11 +02:00
source/blender/nodes/geometry/nodes/node_geo_material_selection.cc Outdated
@ -83,2 +114,2 @@
VArray<bool> selection = select_mesh_faces_by_material(*mesh, material_, domain_mask);
return mesh->attributes().adapt_domain<bool>(std::move(selection), ATTR_DOMAIN_FACE, domain);
switch (context.type()) {
case (GeometryComponent::Type::Mesh): {
Falk David commented 2023-10-17 16:34:00 +02:00
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No need for the (...).

No need for the `(...)`.
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