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/* SPDX-License-Identifier: GPL-2.0-or-later */
#include "DNA_mesh_types.h"
#include "DNA_meshdata_types.h"
#include "BKE_mesh.h"
#include "node_geometry_util.hh"
namespace blender::nodes::node_geo_input_mesh_vertex_neighbors_cc {
static void node_declare(NodeDeclarationBuilder &b)
{
b.add_output<decl::Int>(N_("Vertex Count"))
.field_source()
.description(N_("The number of vertices connected to this vertex with an edge, "
"equal to the number of connected edges"));
b.add_output<decl::Int>(N_("Face Count"))
.field_source()
.description(N_("Number of faces that contain the vertex"));
}
static VArray<int> construct_vertex_count_gvarray(const Mesh &mesh, const eAttrDomain domain)
{
const Span<MEdge> edges = mesh.edges();
if (domain == ATTR_DOMAIN_POINT) {
Array<int> counts(mesh.totvert, 0);
for (const int i : edges.index_range()) {
counts[edges[i].v1]++;
counts[edges[i].v2]++;
}
return VArray<int>::ForContainer(std::move(counts));
}
return {};
}
class VertexCountFieldInput final : public bke::MeshFieldInput {
public:
VertexCountFieldInput() : bke::MeshFieldInput(CPPType::get<int>(), "Vertex Count Field")
{
category_ = Category::Generated;
}
GVArray get_varray_for_context(const Mesh &mesh,
const eAttrDomain domain,
IndexMask UNUSED(mask)) const final
{
return construct_vertex_count_gvarray(mesh, domain);
}
uint64_t hash() const override
{
/* Some random constant hash. */
return 23574528465;
}
bool is_equal_to(const fn::FieldNode &other) const override
{
return dynamic_cast<const VertexCountFieldInput *>(&other) != nullptr;
}
};
static VArray<int> construct_face_count_gvarray(const Mesh &mesh, const eAttrDomain domain)
{
const Span<MLoop> loops = mesh.loops();
if (domain == ATTR_DOMAIN_POINT) {
Array<int> vertices(mesh.totvert, 0);
for (const int i : loops.index_range()) {
int vertex = loops[i].v;
vertices[vertex]++;
}
return VArray<int>::ForContainer(std::move(vertices));
}
return {};
}
class VertexFaceCountFieldInput final : public bke::MeshFieldInput {
public:
VertexFaceCountFieldInput() : bke::MeshFieldInput(CPPType::get<int>(), "Vertex Face Count Field")
{
category_ = Category::Generated;
}
GVArray get_varray_for_context(const Mesh &mesh,
const eAttrDomain domain,
IndexMask UNUSED(mask)) const final
{
return construct_face_count_gvarray(mesh, domain);
}
uint64_t hash() const override
{
/* Some random constant hash. */
return 3462374322;
}
bool is_equal_to(const fn::FieldNode &other) const override
{
return dynamic_cast<const VertexFaceCountFieldInput *>(&other) != nullptr;
}
};
static void node_geo_exec(GeoNodeExecParams params)
{
Field<int> vertex_field{std::make_shared<VertexCountFieldInput>()};
Field<int> face_field{std::make_shared<VertexFaceCountFieldInput>()};
params.set_output("Vertex Count", std::move(vertex_field));
params.set_output("Face Count", std::move(face_field));
}
} // namespace blender::nodes::node_geo_input_mesh_vertex_neighbors_cc
void register_node_type_geo_input_mesh_vertex_neighbors()
{
namespace file_ns = blender::nodes::node_geo_input_mesh_vertex_neighbors_cc;
static bNodeType ntype;
geo_node_type_base(
&ntype, GEO_NODE_INPUT_MESH_VERTEX_NEIGHBORS, "Vertex Neighbors", NODE_CLASS_INPUT);
ntype.declare = file_ns::node_declare;
ntype.geometry_node_execute = file_ns::node_geo_exec;
nodeRegisterType(&ntype);
}
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