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/* SPDX-License-Identifier: GPL-2.0-or-later */
#include "node_geometry_util.hh"
#include "UI_interface.h"
#include "UI_resources.h"
#include "DNA_mesh_types.h"
#include "DNA_meshdata_types.h"
#include "BLI_task.hh"
#include "BKE_material.h"
namespace blender::nodes::node_geo_material_selection_cc {
static void node_declare(NodeDeclarationBuilder &b)
{
b.add_input<decl::Material>(N_("Material")).hide_label(true);
b.add_output<decl::Bool>(N_("Selection")).field_source();
}
static void select_mesh_by_material(const Mesh &mesh,
const Material *material,
const IndexMask mask,
const MutableSpan<bool> r_selection)
{
BLI_assert(mesh.totpoly >= r_selection.size());
Vector<int> material_indices;
for (const int i : IndexRange(mesh.totcol)) {
if (mesh.mat[i] == material) {
material_indices.append(i);
}
}
threading::parallel_for(mask.index_range(), 1024, [&](IndexRange range) {
for (const int i : range) {
const int face_index = mask[i];
r_selection[i] = material_indices.contains(mesh.mpoly[face_index].mat_nr);
}
});
}
class MaterialSelectionFieldInput final : public GeometryFieldInput {
Material *material_;
public:
MaterialSelectionFieldInput(Material *material)
: GeometryFieldInput(CPPType::get<bool>(), "Material Selection node"), material_(material)
{
category_ = Category::Generated;
}
GVArray get_varray_for_context(const GeometryComponent &component,
const AttributeDomain domain,
IndexMask mask) const final
{
if (component.type() != GEO_COMPONENT_TYPE_MESH) {
return {};
}
const MeshComponent &mesh_component = static_cast<const MeshComponent &>(component);
const Mesh *mesh = mesh_component.get_for_read();
if (mesh == nullptr) {
return {};
}
if (domain == ATTR_DOMAIN_FACE) {
Array<bool> selection(mask.min_array_size());
select_mesh_by_material(*mesh, material_, mask, selection);
return VArray<bool>::ForContainer(std::move(selection));
}
Array<bool> selection(mesh->totpoly);
select_mesh_by_material(*mesh, material_, IndexMask(mesh->totpoly), selection);
return mesh_component.attribute_try_adapt_domain<bool>(
VArray<bool>::ForContainer(std::move(selection)), ATTR_DOMAIN_FACE, domain);
return nullptr;
}
uint64_t hash() const override
{
return get_default_hash(material_);
}
bool is_equal_to(const fn::FieldNode &other) const override
{
if (const MaterialSelectionFieldInput *other_material_selection =
dynamic_cast<const MaterialSelectionFieldInput *>(&other)) {
return material_ == other_material_selection->material_;
}
return false;
}
};
static void node_geo_exec(GeoNodeExecParams params)
{
Material *material = params.extract_input<Material *>("Material");
Field<bool> material_field{std::make_shared<MaterialSelectionFieldInput>(material)};
params.set_output("Selection", std::move(material_field));
}
} // namespace blender::nodes::node_geo_material_selection_cc
void register_node_type_geo_material_selection()
{
namespace file_ns = blender::nodes::node_geo_material_selection_cc;
static bNodeType ntype;
geo_node_type_base(
&ntype, GEO_NODE_MATERIAL_SELECTION, "Material Selection", NODE_CLASS_GEOMETRY);
ntype.declare = file_ns::node_declare;
ntype.geometry_node_execute = file_ns::node_geo_exec;
nodeRegisterType(&ntype);
}
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