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

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source/blender/nodes/geometry/nodes/node_geo_curve_topology_curve_of_point.cc

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				/* SPDX-License-Identifier: GPL-2.0-or-later */

				#include "BKE_curves.hh"

				#include "node_geometry_util.hh"

				namespace blender::nodes::node_geo_curve_topology_curve_of_point_cc {

				static void node_declare(NodeDeclarationBuilder &b)
				{
				b.add_input<decl::Int>(N_("Point Index"))
				.implicit_field(implicit_field_inputs::index)
				.description(N_("The control point to retrieve data from"));
				b.add_output<decl::Int>(N_("Curve Index"))
				.dependent_field()
				.description(N_("The curve the control point is part of"));
				b.add_output<decl::Int>(N_("Index in Curve"))
				.dependent_field()
				.description(N_("How far along the control point is along its curve"));
				}

				class CurveOfPointInput final : public bke::CurvesFieldInput {
				public:
				CurveOfPointInput() : bke::CurvesFieldInput(CPPType::get<int>(), "Point Curve Index")
				{
				category_ = Category::Generated;
				}

				GVArray get_varray_for_context(const bke::CurvesGeometry &curves,
				const eAttrDomain domain,
				const IndexMask /mask/) const final
				{
				if (domain != ATTR_DOMAIN_POINT) {
				return {};
				}
				return VArray<int>::ForContainer(curves.point_to_curve_map());
				}

				uint64_t hash() const override
				{
				return 413209687345908697;
				}

				bool is_equal_to(const fn::FieldNode &other) const override
				{
				if (dynamic_cast<const CurveOfPointInput *>(&other)) {
				return true;
				}
				return false;
				}
				};

				class PointIndexInCurveInput final : public bke::CurvesFieldInput {
				public:
				PointIndexInCurveInput() : bke::CurvesFieldInput(CPPType::get<int>(), "Point Index in Curve")
				{
				category_ = Category::Generated;
				}

				GVArray get_varray_for_context(const bke::CurvesGeometry &curves,
				const eAttrDomain domain,
				const IndexMask /mask/) const final
				{
				if (domain != ATTR_DOMAIN_POINT) {
				return {};
				}
				const Span<int> offsets = curves.offsets();
				Array<int> point_to_curve_map = curves.point_to_curve_map();
				return VArray<int>::ForFunc(
				curves.points_num(),
				[offsets, point_to_curve_map = std::move(point_to_curve_map)](const int point_i) {
				const int curve_i = point_to_curve_map[point_i];
				return point_i - offsets[curve_i];
				});
				}

				uint64_t hash() const final
				{
				return 9834765987345677;
				}

				bool is_equal_to(const fn::FieldNode &other) const final
				{
				if (dynamic_cast<const PointIndexInCurveInput *>(&other)) {
				return true;
				}
				return false;
				}
				};

				static void node_geo_exec(GeoNodeExecParams params)
				{
				const Field<int> point_index = params.extract_input<Field<int>>("Point Index");
				if (params.output_is_required("Curve Index")) {
				params.set_output(
				"Curve Index",
				Field<int>(std::make_shared<FieldAtIndexInput>(
				point_index, Field<int>(std::make_shared<CurveOfPointInput>()), ATTR_DOMAIN_POINT)));
				}
				if (params.output_is_required("Index in Curve")) {
				params.set_output("Index in Curve",
				Field<int>(std::make_shared<FieldAtIndexInput>(
				point_index,
				Field<int>(std::make_shared<PointIndexInCurveInput>()),
				ATTR_DOMAIN_POINT)));
				}
				}

				} // namespace blender::nodes::node_geo_curve_topology_curve_of_point_cc

				void register_node_type_geo_curve_topology_curve_of_point()
				{
				namespace file_ns = blender::nodes::node_geo_curve_topology_curve_of_point_cc;

				static bNodeType ntype;
				geo_node_type_base(
				&ntype, GEO_NODE_CURVE_TOPOLOGY_CURVE_OF_POINT, "Curve of Point", NODE_CLASS_INPUT);
				ntype.geometry_node_execute = file_ns::node_geo_exec;
				ntype.declare = file_ns::node_declare;
				nodeRegisterType(&ntype);
				}