BKE_mesh.h

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/* SPDX-FileCopyrightText: 2001-2002 NaN Holding BV. All rights reserved.
 *
 * SPDX-License-Identifier: GPL-2.0-or-later */
#pragma once

 
#include <cstdint>
 
#include "BLI_array.hh"
#include "BLI_string_ref.hh"
 
#include "DNA_mesh_types.h"
 
struct BMesh;
struct BMeshCreateParams;
struct BMeshFromMeshParams;
struct BMeshToMeshParams;
struct CustomData;
struct CustomData_MeshMasks;
struct Depsgraph;
struct KeyBlock;
struct LinkNode;
struct ListBase;
struct MDeformVert;
struct MDisps;
struct MFace;
struct Main;
struct MemArena;
struct Mesh;
struct Object;
struct Scene;
 
/* TODO: Move to `BKE_mesh_types.hh` when possible. */
enum eMeshBatchDirtyMode : int8_t {
  BKE_MESH_BATCH_DIRTY_ALL = 0,
  BKE_MESH_BATCH_DIRTY_SELECT,
  BKE_MESH_BATCH_DIRTY_SELECT_PAINT,
  BKE_MESH_BATCH_DIRTY_SHADING,
  BKE_MESH_BATCH_DIRTY_UVEDIT_ALL,
  BKE_MESH_BATCH_DIRTY_UVEDIT_SELECT,
};
 
/* `mesh.cc` */
 
BMesh *BKE_mesh_to_bmesh_ex(const Mesh *mesh,
                            const BMeshCreateParams *create_params,
                            const BMeshFromMeshParams *convert_params);
BMesh *BKE_mesh_to_bmesh(Mesh *mesh,
                         int active_shapekey,
                         bool add_key_index,
                         const BMeshCreateParams *params);
 
Mesh *BKE_mesh_from_bmesh_nomain(BMesh *bm,
                                 const BMeshToMeshParams *params,
                                 const Mesh *me_settings);
Mesh *BKE_mesh_from_bmesh_for_eval_nomain(BMesh *bm,
                                          const CustomData_MeshMasks *cd_mask_extra,
                                          const Mesh *me_settings);

void BKE_mesh_ensure_default_orig_index_customdata(Mesh *mesh);

void BKE_mesh_ensure_default_orig_index_customdata_no_check(Mesh *mesh);

void BKE_mesh_clear_geometry(Mesh *mesh);

void BKE_mesh_clear_geometry_and_metadata(Mesh *mesh);
 
Mesh *BKE_mesh_add(Main *bmain, const char *name);

void BKE_mesh_copy_parameters_for_eval(Mesh *me_dst, const Mesh *me_src);
void BKE_mesh_copy_parameters(Mesh *me_dst, const Mesh *me_src);
void BKE_mesh_ensure_skin_customdata(Mesh *mesh);

void BKE_mesh_face_offsets_ensure_alloc(Mesh *mesh);
 
Mesh *BKE_mesh_new_nomain(int verts_num, int edges_num, int faces_num, int corners_num);
Mesh *BKE_mesh_new_nomain_from_template(
    const Mesh *me_src, int verts_num, int edges_num, int faces_num, int corners_num);
Mesh *BKE_mesh_new_nomain_from_template_ex(const Mesh *me_src,
                                           int verts_num,
                                           int edges_num,
                                           int tessface_num,
                                           int faces_num,
                                           int corners_num,
                                           CustomData_MeshMasks mask);

Mesh *BKE_mesh_copy_for_eval(const Mesh &source);

Mesh *BKE_mesh_new_nomain_from_curve(const Object *ob);
Mesh *BKE_mesh_new_nomain_from_curve_displist(const Object *ob, const ListBase *dispbase);
 
bool BKE_mesh_attribute_required(blender::StringRef name);
 
blender::Array<blender::float3> BKE_mesh_orco_verts_get(const Object *ob);
void BKE_mesh_orco_verts_transform(Mesh *mesh,
                                   blender::MutableSpan<blender::float3> orco,
                                   bool invert);
void BKE_mesh_orco_verts_transform(Mesh *mesh, float (*orco)[3], int totvert, bool invert);

void BKE_mesh_orco_ensure(Object *ob, Mesh *mesh);
 
Mesh *BKE_mesh_from_object(Object *ob);
void BKE_mesh_assign_object(Main *bmain, Object *ob, Mesh *mesh);
void BKE_mesh_to_curve_nurblist(const Mesh *mesh, ListBase *nurblist, int edge_users_test);
void BKE_mesh_to_curve(Main *bmain, Depsgraph *depsgraph, Scene *scene, Object *ob);
void BKE_mesh_to_pointcloud(Main *bmain, Depsgraph *depsgraph, Scene *scene, Object *ob);
void BKE_pointcloud_to_mesh(Main *bmain, Depsgraph *depsgraph, Scene *scene, Object *ob);
void BKE_mesh_material_index_remove(Mesh *mesh, short index);
bool BKE_mesh_material_index_used(Mesh *mesh, short index);
void BKE_mesh_material_index_clear(Mesh *mesh);
void BKE_mesh_material_remap(Mesh *mesh, const unsigned int *remap, unsigned int remap_len);
 
void BKE_mesh_texspace_calc(Mesh *mesh);
void BKE_mesh_texspace_ensure(Mesh *mesh);
void BKE_mesh_texspace_get(Mesh *mesh, float r_texspace_location[3], float r_texspace_size[3]);
void BKE_mesh_texspace_get_reference(Mesh *mesh,
                                     char **r_texspace_flag,
                                     float **r_texspace_location,
                                     float **r_texspace_size);

Mesh *BKE_mesh_new_from_object(Depsgraph *depsgraph,
                               Object *object,
                               bool preserve_all_data_layers,
                               bool preserve_origindex,
                               bool ensure_subdivision);

Mesh *BKE_mesh_new_from_object_to_bmain(Main *bmain,
                                        Depsgraph *depsgraph,
                                        Object *object,
                                        bool preserve_all_data_layers);

void BKE_mesh_nomain_to_mesh(Mesh *mesh_src, Mesh *mesh_dst, Object *ob);
void BKE_mesh_nomain_to_meshkey(Mesh *mesh_src, Mesh *mesh_dst, KeyBlock *kb);
 
/* Vertex level transformations & checks (no evaluated mesh). */
 
void BKE_mesh_tessface_clear(Mesh *mesh);
 
void BKE_mesh_mselect_clear(Mesh *mesh);
void BKE_mesh_mselect_validate(Mesh *mesh);
int BKE_mesh_mselect_find(const Mesh *mesh, int index, int type);
int BKE_mesh_mselect_active_get(const Mesh *mesh, int type);
void BKE_mesh_mselect_active_set(Mesh *mesh, int index, int type);
 
void BKE_mesh_count_selected_items(const Mesh *mesh, int r_count[3]);
 
/* *** mesh_normals.cc *** */

bool BKE_mesh_vert_normals_are_dirty(const Mesh *mesh);

bool BKE_mesh_face_normals_are_dirty(const Mesh *mesh);

struct MLoopNorSpace {
  float vec_lnor[3];
  float vec_ref[3];
  float vec_ortho[3];
  float ref_alpha;
  float ref_beta;
  struct LinkNode *loops;
  char flags;
};

enum {
  MLNOR_SPACE_IS_SINGLE = 1 << 0,
};

struct MLoopNorSpaceArray {
  MLoopNorSpace **lspacearr;
  struct LinkNode *loops_pool;
  char data_type;
  int spaces_num;
  struct MemArena *mem;
};

enum {
  MLNOR_SPACEARR_LOOP_INDEX = 0,
  MLNOR_SPACEARR_BMLOOP_PTR = 1,
};
 
/* Low-level custom normals functions. */
void BKE_lnor_spacearr_init(MLoopNorSpaceArray *lnors_spacearr, int numLoops, char data_type);
void BKE_lnor_spacearr_clear(MLoopNorSpaceArray *lnors_spacearr);
void BKE_lnor_spacearr_free(MLoopNorSpaceArray *lnors_spacearr);

void BKE_lnor_spacearr_tls_init(MLoopNorSpaceArray *lnors_spacearr,
                                MLoopNorSpaceArray *lnors_spacearr_tls);
void BKE_lnor_spacearr_tls_join(MLoopNorSpaceArray *lnors_spacearr,
                                MLoopNorSpaceArray *lnors_spacearr_tls);
 
MLoopNorSpace *BKE_lnor_space_create(MLoopNorSpaceArray *lnors_spacearr);

void BKE_lnor_space_define(MLoopNorSpace *lnor_space,
                           const float lnor[3],
                           const float vec_ref[3],
                           const float vec_other[3],
                           blender::Span<blender::float3> edge_vectors);

void BKE_lnor_space_add_loop(MLoopNorSpaceArray *lnors_spacearr,
                             MLoopNorSpace *lnor_space,
                             int corner,
                             void *bm_loop,
                             bool is_single);
void BKE_lnor_space_custom_data_to_normal(const MLoopNorSpace *lnor_space,
                                          const short clnor_data[2],
                                          float r_custom_lnor[3]);
void BKE_lnor_space_custom_normal_to_data(const MLoopNorSpace *lnor_space,
                                          const float custom_lnor[3],
                                          short r_clnor_data[2]);

bool BKE_mesh_has_custom_loop_normals(Mesh *mesh);
 
/* *** mesh_evaluate.cc *** */
 
float BKE_mesh_calc_area(const Mesh *mesh);
 
bool BKE_mesh_center_median(const Mesh *mesh, float r_cent[3]);
bool BKE_mesh_center_median_from_faces(const Mesh *mesh, float r_cent[3]);
bool BKE_mesh_center_of_surface(const Mesh *mesh, float r_cent[3]);
bool BKE_mesh_center_of_volume(const Mesh *mesh, float r_cent[3]);

void BKE_mesh_calc_volume(const float (*vert_positions)[3],
                          int mverts_num,
                          const blender::int3 *corner_tris,
                          int corner_tris_num,
                          const int *corner_verts,
                          float *r_volume,
                          float r_center[3]);

void BKE_mesh_mdisp_flip(MDisps *md, bool use_loop_mdisp_flip);

void BKE_mesh_merge_customdata_for_apply_modifier(Mesh *mesh);
 
/* Flush flags. */
 
/* spatial evaluation */
void BKE_mesh_calc_relative_deform(const int *face_offsets,
                                   int faces_num,
                                   const int *corner_verts,
                                   int totvert,
 
                                   const float (*vert_cos_src)[3],
                                   const float (*vert_cos_dst)[3],
 
                                   const float (*vert_cos_org)[3],
                                   float (*vert_cos_new)[3]);
 
/* *** mesh_validate.cc *** */

bool BKE_mesh_validate(Mesh *mesh, bool do_verbose, bool cddata_check_mask);
bool BKE_mesh_is_valid(Mesh *mesh);
bool BKE_mesh_validate_material_indices(Mesh *mesh);

bool BKE_mesh_validate_arrays(Mesh *mesh,
                              float (*vert_positions)[3],
                              unsigned int verts_num,
                              blender::int2 *edges,
                              unsigned int edges_num,
                              MFace *legacy_faces,
                              unsigned int legacy_faces_num,
                              const int *corner_verts,
                              int *corner_edges,
                              unsigned int corners_num,
                              const int *face_offsets,
                              unsigned int faces_num,
                              MDeformVert *dverts, /* assume totvert length */
                              bool do_verbose,
                              bool do_fixes,
                              bool *r_change);

bool BKE_mesh_validate_all_customdata(CustomData *vert_data,
                                      uint verts_num,
                                      CustomData *edge_data,
                                      uint edges_num,
                                      CustomData *corner_data,
                                      uint corners_num,
                                      CustomData *face_data,
                                      uint faces_num,
                                      bool check_meshmask,
                                      bool do_verbose,
                                      bool do_fixes,
                                      bool *r_change);
 
void BKE_mesh_strip_loose_faces(Mesh *mesh);
 
/* **** Depsgraph evaluation **** */
 
void BKE_mesh_eval_geometry(Depsgraph *depsgraph, Mesh *mesh);
 
/* Draw Cache */
void BKE_mesh_batch_cache_dirty_tag(Mesh *mesh, eMeshBatchDirtyMode mode);
void BKE_mesh_batch_cache_free(void *batch_cache);
 
extern void (*BKE_mesh_batch_cache_dirty_tag_cb)(Mesh *mesh, eMeshBatchDirtyMode mode);
extern void (*BKE_mesh_batch_cache_free_cb)(void *batch_cache);
 
/* `mesh_debug.cc` */
 
#ifndef NDEBUG
char *BKE_mesh_debug_info(const Mesh *mesh) ATTR_NONNULL(1) ATTR_MALLOC ATTR_WARN_UNUSED_RESULT;
void BKE_mesh_debug_print(const Mesh *mesh) ATTR_NONNULL(1);
#endif