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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_output<decl::Int>(N_("Vertex Index 1"))
.field_source()
.description(N_("The index of the first vertex in the edge"));
b.add_output<decl::Int>(N_("Vertex Index 2"))
.field_source()
.description(N_("The index of the second vertex in the edge"));
b.add_output<decl::Vector>(N_("Position 1"))
.field_source()
.description(N_("The position of the first vertex in the edge"));
b.add_output<decl::Vector>(N_("Position 2"))
.field_source()
.description(N_("The position of the second vertex in the edge"));
}
enum class VertNumber { V1, V2 };
static VArray<int> construct_edge_verts_gvarray(const Mesh &mesh,
const VertNumber vertex,
const eAttrDomain domain)
{
const Span<MEdge> edges = mesh.edges();
if (domain == ATTR_DOMAIN_EDGE) {
if (vertex == VertNumber::V1) {
return VArray<int>::ForFunc(edges.size(),
[edges](const int i) -> int { return edges[i].v1; });
}
return VArray<int>::ForFunc(edges.size(), [edges](const int i) -> int { return edges[i].v2; });
}
return {};
}
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
{
return construct_edge_verts_gvarray(mesh, vertex_, domain);
}
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 VArray<float3> construct_edge_positions_gvarray(const Mesh &mesh,
const VertNumber vertex,
const eAttrDomain domain)
{
const Span<float3> positions = mesh.positions();
const Span<MEdge> edges = mesh.edges();
if (vertex == VertNumber::V1) {
return mesh.attributes().adapt_domain<float3>(
VArray<float3>::ForFunc(
edges.size(), [positions, edges](const int i) { return positions[edges[i].v1]; }),
ATTR_DOMAIN_EDGE,
domain);
}
return mesh.attributes().adapt_domain<float3>(
VArray<float3>::ForFunc(edges.size(),
[positions, edges](const int i) { return positions[edges[i].v2]; }),
ATTR_DOMAIN_EDGE,
domain);
}
class EdgePositionFieldInput final : public bke::MeshFieldInput {
private:
VertNumber vertex_;
public:
EdgePositionFieldInput(VertNumber vertex)
: bke::MeshFieldInput(CPPType::get<float3>(), "Edge Position Field"), vertex_(vertex)
{
category_ = Category::Generated;
}
GVArray get_varray_for_context(const Mesh &mesh,
const eAttrDomain domain,
IndexMask /*mask*/) const final
{
return construct_edge_positions_gvarray(mesh, vertex_, domain);
}
uint64_t hash() const override
{
return vertex_ == VertNumber::V1 ? 987456978362 : 374587679866;
}
bool is_equal_to(const fn::FieldNode &other) const override
{
if (const EdgePositionFieldInput *other_field = dynamic_cast<const EdgePositionFieldInput *>(
&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)
{
Field<int> vertex_field_1{std::make_shared<EdgeVertsInput>(VertNumber::V1)};
Field<int> vertex_field_2{std::make_shared<EdgeVertsInput>(VertNumber::V2)};
Field<float3> position_field_1{std::make_shared<EdgePositionFieldInput>(VertNumber::V1)};
Field<float3> position_field_2{std::make_shared<EdgePositionFieldInput>(VertNumber::V2)};
params.set_output("Vertex Index 1", std::move(vertex_field_1));
params.set_output("Vertex Index 2", std::move(vertex_field_2));
params.set_output("Position 1", std::move(position_field_1));
params.set_output("Position 2", std::move(position_field_2));
}
} // 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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