Differential D16083 Diff 56395 source/blender/nodes/geometry/nodes/node_geo_mesh_topology_offset_corner_in_face.cc

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source/blender/nodes/geometry/nodes/node_geo_mesh_topology_offset_corner_in_face.cc

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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> corner_to_poly_map = mesh_topology::build_corner_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 = corner_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;
				}
				};

				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);
				}