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/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#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 MeshComponent &component,
const AttributeDomain domain)
{
const Mesh *mesh = component.get_for_read();
if (mesh == nullptr) {
return {};
}
if (domain == ATTR_DOMAIN_POINT) {
Array<int> vertices(mesh->totvert, 0);
for (const int i : IndexRange(mesh->totedge)) {
vertices[mesh->medge[i].v1]++;
vertices[mesh->medge[i].v2]++;
}
return VArray<int>::ForContainer(std::move(vertices));
}
return {};
}
class VertexCountFieldInput final : public GeometryFieldInput {
public:
VertexCountFieldInput() : GeometryFieldInput(CPPType::get<int>(), "Vertex Count Field")
{
category_ = Category::Generated;
}
GVArray get_varray_for_context(const GeometryComponent &component,
const AttributeDomain domain,
IndexMask UNUSED(mask)) const final
{
if (component.type() == GEO_COMPONENT_TYPE_MESH) {
const MeshComponent &mesh_component = static_cast<const MeshComponent &>(component);
return construct_vertex_count_gvarray(mesh_component, domain);
}
return {};
}
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 MeshComponent &component,
const AttributeDomain domain)
{
const Mesh *mesh = component.get_for_read();
if (mesh == nullptr) {
return {};
}
if (domain == ATTR_DOMAIN_POINT) {
Array<int> vertices(mesh->totvert, 0);
for (const int i : IndexRange(mesh->totloop)) {
int vertex = mesh->mloop[i].v;
vertices[vertex]++;
}
return VArray<int>::ForContainer(std::move(vertices));
}
return {};
}
class VertexFaceCountFieldInput final : public GeometryFieldInput {
public:
VertexFaceCountFieldInput() : GeometryFieldInput(CPPType::get<int>(), "Vertex Face Count Field")
{
category_ = Category::Generated;
}
GVArray get_varray_for_context(const GeometryComponent &component,
const AttributeDomain domain,
IndexMask UNUSED(mask)) const final
{
if (component.type() == GEO_COMPONENT_TYPE_MESH) {
const MeshComponent &mesh_component = static_cast<const MeshComponent &>(component);
return construct_face_count_gvarray(mesh_component, domain);
}
return {};
}
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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