diff options
Diffstat (limited to 'source/blender/nodes/geometry/nodes/node_geo_curve_resample.cc')
| -rw-r--r-- | source/blender/nodes/geometry/nodes/node_geo_curve_resample.cc | 238 |
1 files changed, 238 insertions, 0 deletions
diff --git a/source/blender/nodes/geometry/nodes/node_geo_curve_resample.cc b/source/blender/nodes/geometry/nodes/node_geo_curve_resample.cc new file mode 100644 index 00000000000..1c42b9341a0 --- /dev/null +++ b/source/blender/nodes/geometry/nodes/node_geo_curve_resample.cc @@ -0,0 +1,238 @@ +/* + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software Foundation, + * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +#include "BLI_array.hh" +#include "BLI_task.hh" +#include "BLI_timeit.hh" + +#include "BKE_attribute_math.hh" +#include "BKE_spline.hh" + +#include "UI_interface.h" +#include "UI_resources.h" + +#include "node_geometry_util.hh" + +using blender::fn::GVArray_For_GSpan; +using blender::fn::GVArray_For_Span; +using blender::fn::GVArray_Typed; + +static bNodeSocketTemplate geo_node_curve_resample_in[] = { + {SOCK_GEOMETRY, N_("Geometry")}, + {SOCK_INT, N_("Count"), 10, 0, 0, 0, 1, 100000}, + {SOCK_FLOAT, N_("Length"), 0.1f, 0.0f, 0.0f, 0.0f, 0.001f, FLT_MAX, PROP_DISTANCE}, + {-1, ""}, +}; + +static bNodeSocketTemplate geo_node_curve_resample_out[] = { + {SOCK_GEOMETRY, N_("Geometry")}, + {-1, ""}, +}; + +static void geo_node_curve_resample_layout(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr) +{ + uiItemR(layout, ptr, "mode", UI_ITEM_R_EXPAND, nullptr, ICON_NONE); +} + +static void geo_node_curve_resample_init(bNodeTree *UNUSED(tree), bNode *node) +{ + NodeGeometryCurveResample *data = (NodeGeometryCurveResample *)MEM_callocN( + sizeof(NodeGeometryCurveResample), __func__); + + data->mode = GEO_NODE_CURVE_SAMPLE_COUNT; + node->storage = data; +} + +static void geo_node_curve_resample_update(bNodeTree *UNUSED(ntree), bNode *node) +{ + NodeGeometryCurveResample &node_storage = *(NodeGeometryCurveResample *)node->storage; + const GeometryNodeCurveSampleMode mode = (GeometryNodeCurveSampleMode)node_storage.mode; + + bNodeSocket *count_socket = ((bNodeSocket *)node->inputs.first)->next; + bNodeSocket *length_socket = count_socket->next; + + nodeSetSocketAvailability(count_socket, mode == GEO_NODE_CURVE_SAMPLE_COUNT); + nodeSetSocketAvailability(length_socket, mode == GEO_NODE_CURVE_SAMPLE_LENGTH); +} + +namespace blender::nodes { + +struct SampleModeParam { + GeometryNodeCurveSampleMode mode; + std::optional<float> length; + std::optional<int> count; +}; + +template<typename T> +static void sample_span_to_output_spline(const Spline &input_spline, + Span<float> index_factors, + const VArray<T> &input_data, + MutableSpan<T> output_data) +{ + BLI_assert(input_data.size() == input_spline.evaluated_points_size()); + + parallel_for(output_data.index_range(), 1024, [&](IndexRange range) { + for (const int i : range) { + const Spline::LookupResult interp = input_spline.lookup_data_from_index_factor( + index_factors[i]); + output_data[i] = blender::attribute_math::mix2(interp.factor, + input_data[interp.evaluated_index], + input_data[interp.next_evaluated_index]); + } + }); +} + +static SplinePtr resample_spline(const Spline &input_spline, const int count) +{ + std::unique_ptr<PolySpline> output_spline = std::make_unique<PolySpline>(); + output_spline->set_cyclic(input_spline.is_cyclic()); + output_spline->normal_mode = input_spline.normal_mode; + + if (input_spline.evaluated_edges_size() < 1) { + output_spline->resize(1); + output_spline->positions().first() = input_spline.positions().first(); + return output_spline; + } + + output_spline->resize(count); + + Array<float> uniform_samples = input_spline.sample_uniform_index_factors(count); + + { + GVArray_For_Span positions(input_spline.evaluated_positions()); + GVArray_Typed<float3> positions_typed(positions); + sample_span_to_output_spline<float3>( + input_spline, uniform_samples, positions_typed, output_spline->positions()); + } + { + GVArrayPtr interpolated_data = input_spline.interpolate_to_evaluated_points( + GVArray_For_Span(input_spline.radii())); + GVArray_Typed<float> interpolated_data_typed{*interpolated_data}; + sample_span_to_output_spline<float>( + input_spline, uniform_samples, interpolated_data_typed, output_spline->radii()); + } + { + GVArrayPtr interpolated_data = input_spline.interpolate_to_evaluated_points( + GVArray_For_Span(input_spline.tilts())); + GVArray_Typed<float> interpolated_data_typed{*interpolated_data}; + sample_span_to_output_spline<float>( + input_spline, uniform_samples, interpolated_data_typed, output_spline->tilts()); + } + + output_spline->attributes.reallocate(count); + input_spline.attributes.foreach_attribute( + [&](StringRefNull name, const AttributeMetaData &meta_data) { + std::optional<GSpan> input_attribute = input_spline.attributes.get_for_read(name); + BLI_assert(input_attribute); + if (!output_spline->attributes.create(name, meta_data.data_type)) { + BLI_assert_unreachable(); + return false; + } + std::optional<GMutableSpan> output_attribute = output_spline->attributes.get_for_write( + name); + if (!output_attribute) { + BLI_assert_unreachable(); + return false; + } + GVArrayPtr interpolated_attribute = input_spline.interpolate_to_evaluated_points( + GVArray_For_GSpan(*input_attribute)); + attribute_math::convert_to_static_type(meta_data.data_type, [&](auto dummy) { + using T = decltype(dummy); + GVArray_Typed<T> interpolated_attribute_typed{*interpolated_attribute}; + sample_span_to_output_spline<T>(input_spline, + uniform_samples, + interpolated_attribute_typed, + (*output_attribute).typed<T>()); + }); + return true; + }, + ATTR_DOMAIN_POINT); + + return output_spline; +} + +static std::unique_ptr<CurveEval> resample_curve(const CurveEval &input_curve, + const SampleModeParam &mode_param) +{ + std::unique_ptr<CurveEval> output_curve = std::make_unique<CurveEval>(); + + for (const SplinePtr &spline : input_curve.splines()) { + if (mode_param.mode == GEO_NODE_CURVE_SAMPLE_COUNT) { + BLI_assert(mode_param.count); + output_curve->add_spline(resample_spline(*spline, *mode_param.count)); + } + else if (mode_param.mode == GEO_NODE_CURVE_SAMPLE_LENGTH) { + BLI_assert(mode_param.length); + const float length = spline->length(); + const int count = length / *mode_param.length; + output_curve->add_spline(resample_spline(*spline, count)); + } + } + + return output_curve; +} + +static void geo_node_resample_exec(GeoNodeExecParams params) +{ + GeometrySet geometry_set = params.extract_input<GeometrySet>("Geometry"); + + geometry_set = bke::geometry_set_realize_instances(geometry_set); + + if (!geometry_set.has_curve()) { + params.set_output("Geometry", GeometrySet()); + return; + } + + const CurveEval &input_curve = *geometry_set.get_curve_for_read(); + NodeGeometryCurveResample &node_storage = *(NodeGeometryCurveResample *)params.node().storage; + const GeometryNodeCurveSampleMode mode = (GeometryNodeCurveSampleMode)node_storage.mode; + SampleModeParam mode_param; + mode_param.mode = mode; + if (mode == GEO_NODE_CURVE_SAMPLE_COUNT) { + const int count = params.extract_input<int>("Count"); + if (count < 1) { + params.set_output("Geometry", GeometrySet()); + return; + } + mode_param.count.emplace(count); + } + else if (mode == GEO_NODE_CURVE_SAMPLE_LENGTH) { + /* Don't allow asymptotic count increase for low resolution values. */ + const float resolution = std::max(params.extract_input<float>("Length"), 0.0001f); + mode_param.length.emplace(resolution); + } + + std::unique_ptr<CurveEval> output_curve = resample_curve(input_curve, mode_param); + + params.set_output("Geometry", GeometrySet::create_with_curve(output_curve.release())); +} + +} // namespace blender::nodes + +void register_node_type_geo_curve_resample() +{ + static bNodeType ntype; + + geo_node_type_base(&ntype, GEO_NODE_CURVE_RESAMPLE, "Resample Curve", NODE_CLASS_GEOMETRY, 0); + node_type_socket_templates(&ntype, geo_node_curve_resample_in, geo_node_curve_resample_out); + ntype.draw_buttons = geo_node_curve_resample_layout; + node_type_storage( + &ntype, "NodeGeometryCurveResample", node_free_standard_storage, node_copy_standard_storage); + node_type_init(&ntype, geo_node_curve_resample_init); + node_type_update(&ntype, geo_node_curve_resample_update); + ntype.geometry_node_execute = blender::nodes::geo_node_resample_exec; + nodeRegisterType(&ntype); +} |