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/* SPDX-License-Identifier: GPL-2.0-or-later */
#include "BKE_mesh.h"
#include "BKE_mesh_mapping.h"
#include "BLI_task.hh"
#include "node_geometry_util.hh"
namespace blender::nodes::node_geo_mesh_topology_offset_corner_in_face_cc {
static void node_declare(NodeDeclarationBuilder &b)
{
b.add_input<decl::Int>(N_("Corner Index"))
.implicit_field(implicit_field_inputs::index)
.description(
N_("The corner to retrieve data from. Defaults to the corner from the context"));
b.add_input<decl::Int>(N_("Offset"))
.supports_field()
.description(N_("The number of corners to move around the face before finding the result, "
"circling around the start of the face if necessary"));
b.add_output<decl::Int>(N_("Corner Index"))
.dependent_field()
.description(N_("The index of the offset corner"));
}
class OffsetCornerInFaceFieldInput final : public bke::MeshFieldInput {
const Field<int> corner_index_;
const Field<int> offset_;
public:
OffsetCornerInFaceFieldInput(Field<int> corner_index, Field<int> offset)
: bke::MeshFieldInput(CPPType::get<int>(), "Offset Corner in Face"),
corner_index_(std::move(corner_index)),
offset_(std::move(offset))
{
category_ = Category::Generated;
}
GVArray get_varray_for_context(const Mesh &mesh,
const eAttrDomain domain,
const IndexMask mask) const final
{
const IndexRange corner_range(mesh.totloop);
const Span<MPoly> polys = mesh.polys();
const bke::MeshFieldContext context{mesh, domain};
fn::FieldEvaluator evaluator{context, &mask};
evaluator.add(corner_index_);
evaluator.add(offset_);
evaluator.evaluate();
const VArray<int> corner_indices = evaluator.get_evaluated<int>(0);
const VArray<int> offsets = evaluator.get_evaluated<int>(1);
Array<int> loop_to_poly_map = bke::mesh_topology::build_loop_to_poly_map(polys, mesh.totloop);
Array<int> offset_corners(mask.min_array_size());
threading::parallel_for(mask.index_range(), 2048, [&](const IndexRange range) {
for (const int selection_i : range) {
const int corner_i = corner_indices[selection_i];
const int offset = offsets[selection_i];
if (!corner_range.contains(corner_i)) {
offset_corners[selection_i] = 0;
continue;
}
const int poly_i = loop_to_poly_map[corner_i];
const IndexRange poly_range(polys[poly_i].loopstart, polys[poly_i].totloop);
offset_corners[selection_i] = apply_offset_in_cyclic_range(poly_range, corner_i, offset);
}
});
return VArray<int>::ForContainer(std::move(offset_corners));
}
uint64_t hash() const final
{
return get_default_hash(offset_);
}
bool is_equal_to(const fn::FieldNode &other) const final
{
if (const OffsetCornerInFaceFieldInput *other_field =
dynamic_cast<const OffsetCornerInFaceFieldInput *>(&other)) {
return other_field->corner_index_ == corner_index_ && other_field->offset_ == offset_;
}
return false;
}
std::optional<eAttrDomain> preferred_domain(const Mesh & /*mesh*/) const final
{
return ATTR_DOMAIN_CORNER;
}
};
static void node_geo_exec(GeoNodeExecParams params)
{
params.set_output("Corner Index",
Field<int>(std::make_shared<OffsetCornerInFaceFieldInput>(
params.extract_input<Field<int>>("Corner Index"),
params.extract_input<Field<int>>("Offset"))));
}
} // namespace blender::nodes::node_geo_mesh_topology_offset_corner_in_face_cc
void register_node_type_geo_mesh_topology_offset_corner_in_face()
{
namespace file_ns = blender::nodes::node_geo_mesh_topology_offset_corner_in_face_cc;
static bNodeType ntype;
geo_node_type_base(&ntype,
GEO_NODE_MESH_TOPOLOGY_OFFSET_CORNER_IN_FACE,
"Offset Corner in Face",
NODE_CLASS_INPUT);
ntype.geometry_node_execute = file_ns::node_geo_exec;
ntype.declare = file_ns::node_declare;
nodeRegisterType(&ntype);
}
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