mesh_brush_common.hh

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/* SPDX-FileCopyrightText: 2024 Blender Authors
 *
 * SPDX-License-Identifier: GPL-2.0-or-later */
 
#pragma once
 
#include "BLI_array.hh"
#include "BLI_bit_span.hh"
#include "BLI_math_matrix_types.hh"
#include "BLI_math_vector_types.hh"
#include "BLI_offset_indices.hh"
#include "BLI_set.hh"
#include "BLI_span.hh"
#include "BLI_vector.hh"
#include "BLI_virtual_array.hh"
 
#include "BKE_subdiv_ccg.hh"
 
#include "DNA_brush_enums.h"
 
#include "sculpt_intern.hh"

 
struct BMesh;
struct BMVert;
struct BMFace;
struct Brush;
struct Mesh;
struct Object;
struct Sculpt;
struct SculptSession;
struct SubdivCCG;
struct SubdivCCGCoord;
namespace blender {
namespace bke {
class AttributeAccessor;
}
namespace bke::pbvh {
class Node;
class Tree;
}  // namespace bke::pbvh
}  // namespace blender
 
namespace blender::ed::sculpt_paint {
struct StrokeCache;
 
namespace auto_mask {
struct Cache;
};
 
void scale_translations(MutableSpan<float3> translations, Span<float> factors);
void scale_translations(MutableSpan<float3> translations, float factor);
void scale_factors(MutableSpan<float> factors, float strength);
void scale_factors(MutableSpan<float> factors, Span<float> strengths);
void translations_from_offset_and_factors(const float3 &offset,
                                          Span<float> factors,
                                          MutableSpan<float3> r_translations);

void translations_from_new_positions(Span<float3> new_positions,
                                     Span<int> verts,
                                     Span<float3> old_positions,
                                     MutableSpan<float3> translations);
void translations_from_new_positions(Span<float3> new_positions,
                                     Span<float3> old_positions,
                                     MutableSpan<float3> translations);

template<typename T> void gather_data_mesh(Span<T> src, Span<int> indices, MutableSpan<T> dst);
template<typename T>
MutableSpan<T> gather_data_mesh(const Span<T> src, const Span<int> indices, Vector<T> &dst)
{
  dst.resize(indices.size());
  gather_data_mesh(src, indices, dst.as_mutable_span());
  return dst;
}
template<typename T>
void gather_data_grids(const SubdivCCG &subdiv_ccg,
                       Span<T> src,
                       Span<int> grids,
                       MutableSpan<T> node_data);
template<typename T>
MutableSpan<T> gather_data_grids(const SubdivCCG &subdiv_ccg,
                                 const Span<T> src,
                                 const Span<int> grids,
                                 Vector<T> &dst)
{
  const CCGKey key = BKE_subdiv_ccg_key_top_level(subdiv_ccg);
  dst.resize(grids.size() * key.grid_area);
  gather_data_grids(subdiv_ccg, src, grids, dst.as_mutable_span());
  return dst;
}
 
template<typename T>
void gather_data_bmesh(Span<T> src, const Set<BMVert *, 0> &verts, MutableSpan<T> node_data);
template<typename T>
MutableSpan<T> gather_data_bmesh(const Span<T> src, const Set<BMVert *, 0> &verts, Vector<T> &dst)
{
  dst.resize(verts.size());
  gather_data_bmesh(src, verts, dst.as_mutable_span());
  return dst;
}

template<typename T> void scatter_data_mesh(Span<T> src, Span<int> indices, MutableSpan<T> dst);
template<typename T>
void scatter_data_grids(const SubdivCCG &subdiv_ccg,
                        Span<T> node_data,
                        Span<int> grids,
                        MutableSpan<T> dst);
template<typename T>
void scatter_data_bmesh(Span<T> node_data, const Set<BMVert *, 0> &verts, MutableSpan<T> dst);

inline MutableSpan<float3> gather_grids_positions(const SubdivCCG &subdiv_ccg,
                                                  const Span<int> grids,
                                                  Vector<float3> &positions)
{
  const CCGKey key = BKE_subdiv_ccg_key_top_level(subdiv_ccg);
  positions.resize(key.grid_area * grids.size());
  gather_data_grids(subdiv_ccg, subdiv_ccg.positions.as_span(), grids, positions);
  return positions;
}
void gather_bmesh_positions(const Set<BMVert *, 0> &verts, MutableSpan<float3> positions);
inline MutableSpan<float3> gather_bmesh_positions(const Set<BMVert *, 0> &verts,
                                                  Vector<float3> &positions)
{
  positions.resize(verts.size());
  gather_bmesh_positions(verts, positions.as_mutable_span());
  return positions;
}

void gather_grids_normals(const SubdivCCG &subdiv_ccg,
                          Span<int> grids,
                          MutableSpan<float3> normals);
void gather_bmesh_normals(const Set<BMVert *, 0> &verts, MutableSpan<float3> normals);

struct MeshAttributeData {
  /* Point Domain */
  VArraySpan<float> mask;
  VArraySpan<bool> hide_vert;
 
  /* Face Domain */
  VArraySpan<bool> hide_poly;
  VArraySpan<int> face_sets;
 
  explicit MeshAttributeData(const Mesh &mesh);
};
 
void calc_factors_common_mesh(const Depsgraph &depsgraph,
                              const Brush &brush,
                              const Object &object,
                              const MeshAttributeData &attribute_data,
                              Span<float3> positions,
                              Span<float3> vert_normals,
                              const bke::pbvh::MeshNode &node,
                              Vector<float> &r_factors,
                              Vector<float> &r_distances);
void calc_factors_common_mesh_indexed(const Depsgraph &depsgraph,
                                      const Brush &brush,
                                      const Object &object,
                                      const MeshAttributeData &attribute_data,
                                      Span<float3> vert_positions,
                                      Span<float3> vert_normals,
                                      const bke::pbvh::MeshNode &node,
                                      Vector<float> &r_factors,
                                      Vector<float> &r_distances);
void calc_factors_common_mesh_indexed(const Depsgraph &depsgraph,
                                      const Brush &brush,
                                      const Object &object,
                                      const MeshAttributeData &attribute_data,
                                      Span<float3> vert_positions,
                                      Span<float3> vert_normals,
                                      const bke::pbvh::MeshNode &node,
                                      MutableSpan<float> factors,
                                      MutableSpan<float> distances);
void calc_factors_common_grids(const Depsgraph &depsgraph,
                               const Brush &brush,
                               const Object &object,
                               Span<float3> positions,
                               const bke::pbvh::GridsNode &node,
                               Vector<float> &r_factors,
                               Vector<float> &r_distances);
void calc_factors_common_bmesh(const Depsgraph &depsgraph,
                               const Brush &brush,
                               const Object &object,
                               Span<float3> positions,
                               bke::pbvh::BMeshNode &node,
                               Vector<float> &r_factors,
                               Vector<float> &r_distances);
void calc_factors_common_from_orig_data_mesh(const Depsgraph &depsgraph,
                                             const Brush &brush,
                                             const Object &object,
                                             const MeshAttributeData &attribute_data,
                                             Span<float3> positions,
                                             Span<float3> normals,
                                             const bke::pbvh::MeshNode &node,
                                             Vector<float> &r_factors,
                                             Vector<float> &r_distances);
void calc_factors_common_from_orig_data_grids(const Depsgraph &depsgraph,
                                              const Brush &brush,
                                              const Object &object,
                                              Span<float3> positions,
                                              Span<float3> normals,
                                              const bke::pbvh::GridsNode &node,
                                              Vector<float> &r_factors,
                                              Vector<float> &r_distances);
void calc_factors_common_from_orig_data_bmesh(const Depsgraph &depsgraph,
                                              const Brush &brush,
                                              const Object &object,
                                              Span<float3> positions,
                                              Span<float3> normals,
                                              bke::pbvh::BMeshNode &node,
                                              Vector<float> &r_factors,
                                              Vector<float> &r_distances);

void fill_factor_from_hide(Span<bool> hide_vert, Span<int> verts, MutableSpan<float> r_factors);
void fill_factor_from_hide(const SubdivCCG &subdiv_ccg,
                           Span<int> grids,
                           MutableSpan<float> r_factors);
void fill_factor_from_hide(const Set<BMVert *, 0> &verts, MutableSpan<float> r_factors);

void fill_factor_from_hide_and_mask(Span<bool> hide_vert,
                                    Span<float> mask,
                                    Span<int> verts,
                                    MutableSpan<float> r_factors);
void fill_factor_from_hide_and_mask(const SubdivCCG &subdiv_ccg,
                                    Span<int> grids,
                                    MutableSpan<float> r_factors);
void fill_factor_from_hide_and_mask(const BMesh &bm,
                                    const Set<BMVert *, 0> &verts,
                                    MutableSpan<float> r_factors);

void calc_front_face(const float3 &view_normal, Span<float3> normals, MutableSpan<float> factors);
void calc_front_face(const float3 &view_normal,
                     Span<float3> vert_normals,
                     Span<int> verts,
                     MutableSpan<float> factors);
void calc_front_face(const float3 &view_normal,
                     const SubdivCCG &subdiv_ccg,
                     Span<int> grids,
                     MutableSpan<float> factors);
void calc_front_face(const float3 &view_normal,
                     const Set<BMVert *, 0> &verts,
                     MutableSpan<float> factors);
void calc_front_face(const float3 &view_normal,
                     const Set<BMFace *, 0> &faces,
                     MutableSpan<float> factors);

void filter_region_clip_factors(const SculptSession &ss,
                                Span<float3> vert_positions,
                                Span<int> verts,
                                MutableSpan<float> factors);
void filter_region_clip_factors(const SculptSession &ss,
                                Span<float3> positions,
                                MutableSpan<float> factors);

void calc_brush_distances(const SculptSession &ss,
                          Span<float3> vert_positions,
                          Span<int> vert,
                          eBrushFalloffShape falloff_shape,
                          MutableSpan<float> r_distances);
void calc_brush_distances(const SculptSession &ss,
                          Span<float3> positions,
                          eBrushFalloffShape falloff_shape,
                          MutableSpan<float> r_distances);
void calc_brush_distances_squared(const SculptSession &ss,
                                  Span<float3> positions,
                                  Span<int> verts,
                                  eBrushFalloffShape falloff_shape,
                                  MutableSpan<float> r_distances);
void calc_brush_distances_squared(const SculptSession &ss,
                                  Span<float3> positions,
                                  eBrushFalloffShape falloff_shape,
                                  MutableSpan<float> r_distances);

void filter_distances_with_radius(float radius, Span<float> distances, MutableSpan<float> factors);

template<typename T>
void calc_brush_cube_distances(const Brush &brush,
                               const Span<T> positions,
                               const MutableSpan<float> r_distances);

void apply_hardness_to_distances(float radius, float hardness, MutableSpan<float> distances);
inline void apply_hardness_to_distances(const StrokeCache &cache,
                                        const MutableSpan<float> distances)
{
  apply_hardness_to_distances(cache.radius, cache.hardness, distances);
}

void calc_brush_strength_factors(const StrokeCache &cache,
                                 const Brush &brush,
                                 Span<float> distances,
                                 MutableSpan<float> factors);

void calc_brush_texture_factors(const SculptSession &ss,
                                const Brush &brush,
                                Span<float3> vert_positions,
                                Span<int> vert,
                                MutableSpan<float> factors);
void calc_brush_texture_factors(const SculptSession &ss,
                                const Brush &brush,
                                Span<float3> positions,
                                MutableSpan<float> factors);

void apply_translations(Span<float3> translations, Span<int> verts, MutableSpan<float3> positions);
void apply_translations(Span<float3> translations, Span<int> grids, SubdivCCG &subdiv_ccg);
void apply_translations(Span<float3> translations, const Set<BMVert *, 0> &verts);

void project_translations(MutableSpan<float3> translations, const float3 &plane);

void reset_translations_to_original(MutableSpan<float3> translations,
                                    Span<float3> positions,
                                    Span<float3> orig_positions);

void apply_crazyspace_to_translations(Span<float3x3> deform_imats,
                                      Span<int> verts,
                                      MutableSpan<float3> translations);

void clip_and_lock_translations(const Sculpt &sd,
                                const SculptSession &ss,
                                Span<float3> positions,
                                Span<int> verts,
                                MutableSpan<float3> translations);
void clip_and_lock_translations(const Sculpt &sd,
                                const SculptSession &ss,
                                Span<float3> positions,
                                MutableSpan<float3> translations);

OffsetIndices<int> create_node_vert_offsets(Span<bke::pbvh::MeshNode> nodes,
                                            const IndexMask &node_mask,
                                            Array<int> &node_data);
OffsetIndices<int> create_node_vert_offsets(const CCGKey &key,
                                            Span<bke::pbvh::GridsNode> nodes,
                                            const IndexMask &node_mask,
                                            Array<int> &node_data);
OffsetIndices<int> create_node_vert_offsets_bmesh(Span<bke::pbvh::BMeshNode> nodes,
                                                  const IndexMask &node_mask,
                                                  Array<int> &node_data);

GroupedSpan<int> calc_vert_neighbors(OffsetIndices<int> faces,
                                     Span<int> corner_verts,
                                     GroupedSpan<int> vert_to_face,
                                     Span<bool> hide_poly,
                                     Span<int> verts,
                                     Vector<int> &r_offset_data,
                                     Vector<int> &r_data);
GroupedSpan<int> calc_vert_neighbors(const SubdivCCG &subdiv_ccg,
                                     Span<int> grids,
                                     Vector<int> &r_offset_data,
                                     Vector<int> &r_data);
GroupedSpan<BMVert *> calc_vert_neighbors(Set<BMVert *, 0> verts,
                                          Vector<int> &r_offset_data,
                                          Vector<BMVert *> &r_data);

GroupedSpan<int> calc_vert_neighbors_interior(OffsetIndices<int> faces,
                                              Span<int> corner_verts,
                                              GroupedSpan<int> vert_to_face,
                                              BitSpan boundary_verts,
                                              Span<bool> hide_poly,
                                              Span<int> verts,
                                              Vector<int> &r_offset_data,
                                              Vector<int> &r_data);
GroupedSpan<int> calc_vert_neighbors_interior(OffsetIndices<int> faces,
                                              Span<int> corner_verts,
                                              GroupedSpan<int> vert_to_face,
                                              BitSpan boundary_verts,
                                              Span<bool> hide_poly,
                                              Span<int> verts,
                                              Span<float> factors,
                                              Vector<int> &r_offset_data,
                                              Vector<int> &r_data);
void calc_vert_neighbors_interior(OffsetIndices<int> faces,
                                  Span<int> corner_verts,
                                  BitSpan boundary_verts,
                                  const SubdivCCG &subdiv_ccg,
                                  Span<int> grids,
                                  MutableSpan<Vector<SubdivCCGCoord>> result);
void calc_vert_neighbors_interior(const Set<BMVert *, 0> &verts,
                                  MutableSpan<Vector<BMVert *>> result);

void calc_translations_to_plane(Span<float3> vert_positions,
                                Span<int> verts,
                                const float4 &plane,
                                MutableSpan<float3> translations);
void calc_translations_to_plane(Span<float3> positions,
                                const float4 &plane,
                                MutableSpan<float3> translations);

void filter_verts_outside_symmetry_area(Span<float3> positions,
                                        const float3 &pivot,
                                        ePaintSymmetryFlags symm,
                                        MutableSpan<float> factors);

void filter_plane_trim_limit_factors(const Brush &brush,
                                     const StrokeCache &cache,
                                     Span<float3> translations,
                                     MutableSpan<float> factors);

void filter_below_plane_factors(Span<float3> vert_positions,
                                Span<int> verts,
                                const float4 &plane,
                                MutableSpan<float> factors);
void filter_below_plane_factors(Span<float3> positions,
                                const float4 &plane,
                                MutableSpan<float> factors);
 
/* Ignore points above the plane. */
void filter_above_plane_factors(Span<float3> vert_positions,
                                Span<int> verts,
                                const float4 &plane,
                                MutableSpan<float> factors);
void filter_above_plane_factors(Span<float3> positions,
                                const float4 &plane,
                                MutableSpan<float> factors);
 
}  // namespace blender::ed::sculpt_paint