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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_edge_vertices_cc {
static void node_declare(NodeDeclarationBuilder &b)
{
b.add_input<decl::Int>(N_("Edge Index"))
.implicit_field(implicit_field_inputs::index)
.description(N_("The edge to retrieve data from. Defaults to the edge from the context"));
b.add_output<decl::Int>(N_("Vertex Index 1"))
.dependent_field()
.description(N_("The index of the first vertex in the edge"));
b.add_output<decl::Int>(N_("Vertex Index 2"))
.dependent_field()
.description(N_("The index of the second vertex in the edge"));
b.add_output<decl::Vector>(N_("Position 1"))
.dependent_field()
.description(N_("The position of the first vertex in the edge"));
b.add_output<decl::Vector>(N_("Position 2"))
.dependent_field()
.description(N_("The position of the second vertex in the edge"));
}
enum class VertNumber { V1, V2 };
static int edge_get_v1(const MEdge &edge)
{
return edge.v1;
}
static int edge_get_v2(const MEdge &edge)
{
return edge.v2;
}
class EdgeVertsInput final : public bke::MeshFieldInput {
private:
VertNumber vertex_;
public:
EdgeVertsInput(VertNumber vertex)
: bke::MeshFieldInput(CPPType::get<int>(), "Edge Vertices Field"), vertex_(vertex)
{
category_ = Category::Generated;
}
GVArray get_varray_for_context(const Mesh &mesh,
const eAttrDomain domain,
const IndexMask /*mask*/) const final
{
if (domain != ATTR_DOMAIN_EDGE) {
return {};
}
switch (vertex_) {
case VertNumber::V1:
return VArray<int>::ForDerivedSpan<MEdge, edge_get_v1>(mesh.edges());
case VertNumber::V2:
return VArray<int>::ForDerivedSpan<MEdge, edge_get_v2>(mesh.edges());
}
BLI_assert_unreachable();
return {};
}
uint64_t hash() const override
{
return vertex_ == VertNumber::V1 ? 23847562893465 : 92384598734567;
}
bool is_equal_to(const fn::FieldNode &other) const override
{
if (const EdgeVertsInput *other_field = dynamic_cast<const EdgeVertsInput *>(&other)) {
return vertex_ == other_field->vertex_;
}
return false;
}
std::optional<eAttrDomain> preferred_domain(const Mesh & /*mesh*/) const override
{
return ATTR_DOMAIN_EDGE;
}
};
static void node_geo_exec(GeoNodeExecParams params)
{
const Field<int> edge_index = params.extract_input<Field<int>>("Edge Index");
Field<int> vertex_field_1(std::make_shared<FieldAtIndexInput>(
edge_index, Field<int>(std::make_shared<EdgeVertsInput>(VertNumber::V1)), ATTR_DOMAIN_EDGE));
Field<int> vertex_field_2(std::make_shared<FieldAtIndexInput>(
edge_index, Field<int>(std::make_shared<EdgeVertsInput>(VertNumber::V2)), ATTR_DOMAIN_EDGE));
params.set_output("Vertex Index 1", vertex_field_1);
params.set_output("Vertex Index 2", vertex_field_2);
if (params.output_is_required("Position 1")) {
params.set_output("Position 1",
Field<float3>(std::make_shared<FieldAtIndexInput>(
vertex_field_1,
Field<float3>(AttributeFieldInput::Create<float3>("position")),
ATTR_DOMAIN_POINT)));
}
if (params.output_is_required("Position 2")) {
params.set_output("Position 2",
Field<float3>(std::make_shared<FieldAtIndexInput>(
vertex_field_2,
Field<float3>(AttributeFieldInput::Create<float3>("position")),
ATTR_DOMAIN_POINT)));
}
}
} // namespace blender::nodes::node_geo_input_mesh_edge_vertices_cc
void register_node_type_geo_input_mesh_edge_vertices()
{
namespace file_ns = blender::nodes::node_geo_input_mesh_edge_vertices_cc;
static bNodeType ntype;
geo_node_type_base(&ntype, GEO_NODE_INPUT_MESH_EDGE_VERTICES, "Edge Vertices", NODE_CLASS_INPUT);
ntype.declare = file_ns::node_declare;
ntype.geometry_node_execute = file_ns::node_geo_exec;
nodeRegisterType(&ntype);
}
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