diff options
Diffstat (limited to 'source/blender/editors/sculpt_paint/curves_sculpt_brush.cc')
| -rw-r--r-- | source/blender/editors/sculpt_paint/curves_sculpt_brush.cc | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/source/blender/editors/sculpt_paint/curves_sculpt_brush.cc b/source/blender/editors/sculpt_paint/curves_sculpt_brush.cc index 92ce6ba3153..10564942ab9 100644 --- a/source/blender/editors/sculpt_paint/curves_sculpt_brush.cc +++ b/source/blender/editors/sculpt_paint/curves_sculpt_brush.cc @@ -4,6 +4,7 @@ #include "curves_sculpt_intern.hh" +#include "BKE_attribute_math.hh" #include "BKE_bvhutils.h" #include "BKE_context.h" #include "BKE_curves.hh" @@ -12,7 +13,11 @@ #include "UI_interface.h" +#include "DNA_mesh_types.h" +#include "DNA_meshdata_types.h" + #include "BLI_enumerable_thread_specific.hh" +#include "BLI_length_parameterize.hh" #include "BLI_task.hh" /** @@ -249,6 +254,55 @@ std::optional<CurvesBrush3D> sample_curves_3d_brush(const Depsgraph &depsgraph, return brush_3d; } +std::optional<CurvesBrush3D> sample_curves_surface_3d_brush( + const Depsgraph &depsgraph, + const ARegion ®ion, + const View3D &v3d, + const CurvesSurfaceTransforms &transforms, + const BVHTreeFromMesh &surface_bvh, + const float2 &brush_pos_re, + const float brush_radius_re) +{ + float3 brush_ray_start_wo, brush_ray_end_wo; + ED_view3d_win_to_segment_clipped( + &depsgraph, ®ion, &v3d, brush_pos_re, brush_ray_start_wo, brush_ray_end_wo, true); + const float3 brush_ray_start_su = transforms.world_to_surface * brush_ray_start_wo; + const float3 brush_ray_end_su = transforms.world_to_surface * brush_ray_end_wo; + + const float3 brush_ray_direction_su = math::normalize(brush_ray_end_su - brush_ray_start_su); + + BVHTreeRayHit ray_hit; + ray_hit.dist = FLT_MAX; + ray_hit.index = -1; + BLI_bvhtree_ray_cast(surface_bvh.tree, + brush_ray_start_su, + brush_ray_direction_su, + 0.0f, + &ray_hit, + surface_bvh.raycast_callback, + const_cast<void *>(static_cast<const void *>(&surface_bvh))); + if (ray_hit.index == -1) { + return std::nullopt; + } + + float3 brush_radius_ray_start_wo, brush_radius_ray_end_wo; + ED_view3d_win_to_segment_clipped(&depsgraph, + ®ion, + &v3d, + brush_pos_re + float2(brush_radius_re, 0), + brush_radius_ray_start_wo, + brush_radius_ray_end_wo, + true); + const float3 brush_radius_ray_start_cu = transforms.world_to_curves * brush_radius_ray_start_wo; + const float3 brush_radius_ray_end_cu = transforms.world_to_curves * brush_radius_ray_end_wo; + + const float3 brush_pos_su = ray_hit.co; + const float3 brush_pos_cu = transforms.surface_to_curves * brush_pos_su; + const float brush_radius_cu = dist_to_line_v3( + brush_pos_cu, brush_radius_ray_start_cu, brush_radius_ray_end_cu); + return CurvesBrush3D{brush_pos_cu, brush_radius_cu}; +} + Vector<float4x4> get_symmetry_brush_transforms(const eCurvesSymmetryType symmetry) { Vector<float4x4> matrices; @@ -277,4 +331,53 @@ Vector<float4x4> get_symmetry_brush_transforms(const eCurvesSymmetryType symmetr return matrices; } +float transform_brush_radius(const float4x4 &transform, + const float3 &brush_position, + const float old_radius) +{ + const float3 offset_position = brush_position + float3(old_radius, 0.0f, 0.0f); + const float3 new_position = transform * brush_position; + const float3 new_offset_position = transform * offset_position; + return math::distance(new_position, new_offset_position); +} + +void move_last_point_and_resample(MutableSpan<float3> positions, const float3 &new_last_position) +{ + /* Find the accumulated length of each point in the original curve, + * treating it as a poly curve for performance reasons and simplicity. */ + Array<float> orig_lengths(length_parameterize::segments_num(positions.size(), false)); + length_parameterize::accumulate_lengths<float3>(positions, false, orig_lengths); + const float orig_total_length = orig_lengths.last(); + + /* Find the factor by which the new curve is shorter or longer than the original. */ + const float new_last_segment_length = math::distance(positions.last(1), new_last_position); + const float new_total_length = orig_lengths.last(1) + new_last_segment_length; + const float length_factor = safe_divide(new_total_length, orig_total_length); + + /* Calculate the lengths to sample the original curve with by scaling the original lengths. */ + Array<float> new_lengths(positions.size() - 1); + new_lengths.first() = 0.0f; + for (const int i : new_lengths.index_range().drop_front(1)) { + new_lengths[i] = orig_lengths[i - 1] * length_factor; + } + + Array<int> indices(positions.size() - 1); + Array<float> factors(positions.size() - 1); + length_parameterize::sample_at_lengths(orig_lengths, new_lengths, indices, factors); + + Array<float3> new_positions(positions.size() - 1); + length_parameterize::linear_interpolation<float3>(positions, indices, factors, new_positions); + positions.drop_back(1).copy_from(new_positions); + positions.last() = new_last_position; +} + +CurvesSculptCommonContext::CurvesSculptCommonContext(const bContext &C) +{ + this->depsgraph = CTX_data_depsgraph_pointer(&C); + this->scene = CTX_data_scene(&C); + this->region = CTX_wm_region(&C); + this->v3d = CTX_wm_view3d(&C); + this->rv3d = CTX_wm_region_view3d(&C); +} + } // namespace blender::ed::sculpt_paint |