281 lines
9.7 KiB
C++
281 lines
9.7 KiB
C++
/* SPDX-FileCopyrightText: 2023 Blender Authors
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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#include <algorithm>
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#include "curves_sculpt_intern.hh"
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#include "BLI_kdtree.h"
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#include "BLI_math_geom.h"
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#include "BLI_math_matrix_types.hh"
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#include "BLI_rand.hh"
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#include "BLI_vector.hh"
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#include "DEG_depsgraph.hh"
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#include "BKE_attribute_math.hh"
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#include "BKE_brush.hh"
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#include "BKE_bvhutils.hh"
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#include "BKE_context.hh"
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#include "BKE_curves.hh"
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#include "BKE_mesh.hh"
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#include "BKE_mesh_runtime.hh"
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#include "BKE_paint.hh"
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#include "DNA_brush_enums.h"
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#include "DNA_brush_types.h"
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#include "DNA_curves_types.h"
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#include "DNA_object_types.h"
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#include "DNA_screen_types.h"
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#include "DNA_space_types.h"
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#include "ED_screen.hh"
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#include "ED_view3d.hh"
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#include "WM_api.hh"
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/**
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* The code below uses a suffix naming convention to indicate the coordinate space:
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* cu: Local space of the curves object that is being edited.
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* wo: World space.
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* re: 2D coordinates within the region.
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*/
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namespace blender::ed::sculpt_paint {
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using blender::bke::CurvesGeometry;
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class DeleteOperation : public CurvesSculptStrokeOperation {
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private:
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CurvesBrush3D brush_3d_;
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/**
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* Need to store those in case the brush is evaluated more than once before the curves are
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* evaluated again. This can happen when the mouse is moved quickly and the brush spacing is
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* small.
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*/
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Vector<float3> deformed_positions_;
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friend struct DeleteOperationExecutor;
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public:
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void on_stroke_extended(const bContext &C, const StrokeExtension &stroke_extension) override;
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};
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struct DeleteOperationExecutor {
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DeleteOperation *self_ = nullptr;
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CurvesSculptCommonContext ctx_;
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Object *object_ = nullptr;
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Curves *curves_id_ = nullptr;
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CurvesGeometry *curves_ = nullptr;
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IndexMaskMemory selected_curve_memory_;
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IndexMask curve_selection_;
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const CurvesSculpt *curves_sculpt_ = nullptr;
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const Brush *brush_ = nullptr;
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float brush_radius_base_re_;
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float brush_radius_factor_;
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float2 brush_pos_re_;
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CurvesSurfaceTransforms transforms_;
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DeleteOperationExecutor(const bContext &C) : ctx_(C) {}
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void execute(DeleteOperation &self, const bContext &C, const StrokeExtension &stroke_extension)
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{
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self_ = &self;
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object_ = CTX_data_active_object(&C);
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curves_id_ = static_cast<Curves *>(object_->data);
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curves_ = &curves_id_->geometry.wrap();
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curve_selection_ = curves::retrieve_selected_curves(*curves_id_, selected_curve_memory_);
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curves_sculpt_ = ctx_.scene->toolsettings->curves_sculpt;
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brush_ = BKE_paint_brush_for_read(&curves_sculpt_->paint);
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brush_radius_base_re_ = BKE_brush_size_get(ctx_.scene, brush_);
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brush_radius_factor_ = brush_radius_factor(*brush_, stroke_extension);
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brush_pos_re_ = stroke_extension.mouse_position;
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transforms_ = CurvesSurfaceTransforms(*object_, curves_id_->surface);
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const eBrushFalloffShape falloff_shape = eBrushFalloffShape(brush_->falloff_shape);
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if (stroke_extension.is_first) {
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if (falloff_shape == PAINT_FALLOFF_SHAPE_SPHERE) {
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this->initialize_spherical_brush_reference_point();
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}
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const bke::crazyspace::GeometryDeformation deformation =
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bke::crazyspace::get_evaluated_curves_deformation(*ctx_.depsgraph, *object_);
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self_->deformed_positions_ = deformation.positions;
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}
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Array<bool> curves_to_keep(curves_->curves_num(), true);
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if (falloff_shape == PAINT_FALLOFF_SHAPE_TUBE) {
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this->delete_projected_with_symmetry(curves_to_keep);
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}
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else if (falloff_shape == PAINT_FALLOFF_SHAPE_SPHERE) {
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this->delete_spherical_with_symmetry(curves_to_keep);
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}
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else {
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BLI_assert_unreachable();
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}
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IndexMaskMemory mask_memory;
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const IndexMask mask_to_keep = IndexMask::from_bools(curves_to_keep, mask_memory);
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/* Remove deleted curves from the stored deformed positions. */
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const OffsetIndices points_by_curve = curves_->points_by_curve();
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Vector<float3> new_deformed_positions;
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mask_to_keep.foreach_index([&](const int64_t i) {
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new_deformed_positions.extend(
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self_->deformed_positions_.as_span().slice(points_by_curve[i]));
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});
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self_->deformed_positions_ = std::move(new_deformed_positions);
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*curves_ = bke::curves_copy_curve_selection(*curves_, mask_to_keep, {});
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DEG_id_tag_update(&curves_id_->id, ID_RECALC_GEOMETRY);
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WM_main_add_notifier(NC_GEOM | ND_DATA, &curves_id_->id);
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ED_region_tag_redraw(ctx_.region);
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}
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void delete_projected_with_symmetry(MutableSpan<bool> curves_to_keep)
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{
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const Vector<float4x4> symmetry_brush_transforms = get_symmetry_brush_transforms(
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eCurvesSymmetryType(curves_id_->symmetry));
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for (const float4x4 &brush_transform : symmetry_brush_transforms) {
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this->delete_projected(brush_transform, curves_to_keep);
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}
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}
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void delete_projected(const float4x4 &brush_transform, MutableSpan<bool> curves_to_keep)
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{
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const float4x4 brush_transform_inv = math::invert(brush_transform);
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const float4x4 projection = ED_view3d_ob_project_mat_get(ctx_.rv3d, object_);
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const float brush_radius_re = brush_radius_base_re_ * brush_radius_factor_;
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const float brush_radius_sq_re = pow2f(brush_radius_re);
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const OffsetIndices points_by_curve = curves_->points_by_curve();
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curve_selection_.foreach_segment(GrainSize(512), [&](const IndexMaskSegment segment) {
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for (const int curve_i : segment) {
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const IndexRange points = points_by_curve[curve_i];
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if (points.size() == 1) {
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const float3 pos_cu = math::transform_point(brush_transform_inv,
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self_->deformed_positions_[points.first()]);
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const float2 pos_re = ED_view3d_project_float_v2_m4(ctx_.region, pos_cu, projection);
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if (math::distance_squared(brush_pos_re_, pos_re) <= brush_radius_sq_re) {
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curves_to_keep[curve_i] = false;
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}
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continue;
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}
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for (const int segment_i : points.drop_back(1)) {
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const float3 pos1_cu = math::transform_point(brush_transform_inv,
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self_->deformed_positions_[segment_i]);
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const float3 pos2_cu = math::transform_point(brush_transform_inv,
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self_->deformed_positions_[segment_i + 1]);
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const float2 pos1_re = ED_view3d_project_float_v2_m4(ctx_.region, pos1_cu, projection);
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const float2 pos2_re = ED_view3d_project_float_v2_m4(ctx_.region, pos2_cu, projection);
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const float dist_sq_re = dist_squared_to_line_segment_v2(
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brush_pos_re_, pos1_re, pos2_re);
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if (dist_sq_re <= brush_radius_sq_re) {
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curves_to_keep[curve_i] = false;
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break;
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}
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}
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}
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});
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}
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void delete_spherical_with_symmetry(MutableSpan<bool> curves_to_keep)
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{
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float3 brush_wo;
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ED_view3d_win_to_3d(
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ctx_.v3d,
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ctx_.region,
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math::transform_point(transforms_.curves_to_world, self_->brush_3d_.position_cu),
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brush_pos_re_,
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brush_wo);
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const float3 brush_cu = math::transform_point(transforms_.world_to_curves, brush_wo);
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const Vector<float4x4> symmetry_brush_transforms = get_symmetry_brush_transforms(
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eCurvesSymmetryType(curves_id_->symmetry));
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for (const float4x4 &brush_transform : symmetry_brush_transforms) {
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this->delete_spherical(math::transform_point(brush_transform, brush_cu), curves_to_keep);
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}
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}
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void delete_spherical(const float3 &brush_cu, MutableSpan<bool> curves_to_keep)
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{
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const float brush_radius_cu = self_->brush_3d_.radius_cu * brush_radius_factor_;
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const float brush_radius_sq_cu = pow2f(brush_radius_cu);
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const OffsetIndices points_by_curve = curves_->points_by_curve();
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curve_selection_.foreach_segment(GrainSize(512), [&](const IndexMaskSegment segment) {
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for (const int curve_i : segment) {
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const IndexRange points = points_by_curve[curve_i];
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if (points.size() == 1) {
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const float3 &pos_cu = self_->deformed_positions_[points.first()];
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const float distance_sq_cu = math::distance_squared(pos_cu, brush_cu);
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if (distance_sq_cu < brush_radius_sq_cu) {
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curves_to_keep[curve_i] = false;
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}
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continue;
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}
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for (const int segment_i : points.drop_back(1)) {
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const float3 &pos1_cu = self_->deformed_positions_[segment_i];
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const float3 &pos2_cu = self_->deformed_positions_[segment_i + 1];
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const float distance_sq_cu = dist_squared_to_line_segment_v3(brush_cu, pos1_cu, pos2_cu);
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if (distance_sq_cu > brush_radius_sq_cu) {
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continue;
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}
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curves_to_keep[curve_i] = false;
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break;
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}
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}
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});
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}
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void initialize_spherical_brush_reference_point()
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{
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std::optional<CurvesBrush3D> brush_3d = sample_curves_3d_brush(*ctx_.depsgraph,
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*ctx_.region,
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*ctx_.v3d,
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*ctx_.rv3d,
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*object_,
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brush_pos_re_,
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brush_radius_base_re_);
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if (brush_3d.has_value()) {
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self_->brush_3d_ = *brush_3d;
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}
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}
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};
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void DeleteOperation::on_stroke_extended(const bContext &C,
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const StrokeExtension &stroke_extension)
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{
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DeleteOperationExecutor executor{C};
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executor.execute(*this, C, stroke_extension);
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}
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std::unique_ptr<CurvesSculptStrokeOperation> new_delete_operation()
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{
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return std::make_unique<DeleteOperation>();
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}
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} // namespace blender::ed::sculpt_paint
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