text: /*
   * 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.
   */
  
  #ifndef __BKE_EDITMESH_H__
  #define __BKE_EDITMESH_H__
  
  /** \file
   * \ingroup bke
   *
   * The \link edmesh EDBM module\endlink is for editmode bmesh stuff.
   * In contrast, this module is for code shared with blenkernel that's
   * only concerned with low level operations on the #BMEditMesh structure.
   */
  
  #include "BKE_customdata.h"
  #include "bmesh.h"
  
  struct BMLoop;
  struct BMesh;
  struct Depsgraph;
  struct EditMeshData;
  struct Mesh;
  struct MeshStatVis;
  struct Scene;
  
  /**
   * This structure is used for mesh edit-mode.
   *
   * through this, you get access to both the edit #BMesh,
   * it's tessellation, and various stuff that doesn't belong in the BMesh
   * struct itself.
   *
   * the entire derivedmesh and modifier system works with this structure,
   * and not BMesh.  Mesh->edit_bmesh stores a pointer to this structure. */
  typedef struct BMEditMesh {
    struct BMesh *bm;
  
    /*this is for undoing failed operations*/
    struct BMEditMesh *emcopy;
    int emcopyusers;
  
    /* we store tessellations as triplets of three loops,
     * which each define a triangle.*/
    struct BMLoop *(*looptris)[3];
    int tottri;
  
    struct Mesh *mesh_eval_final, *mesh_eval_cage;
  
    /*derivedmesh stuff*/
    CustomData_MeshMasks lastDataMask;
    unsigned char (*derivedVertColor)[4];
    int derivedVertColorLen;
    unsigned char (*derivedFaceColor)[4];
    int derivedFaceColorLen;
  
    /*selection mode*/
    short selectmode;
    short mat_nr;
  
    /* Object this editmesh came from (if it came from one) */
    struct Object *ob;
  
    /*temp variables for x-mirror editing*/
    int mirror_cdlayer; /* -1 is invalid */
  } BMEditMesh;
  
  /* editmesh.c */
  void BKE_editmesh_looptri_calc(BMEditMesh *em);
  BMEditMesh *BKE_editmesh_create(BMesh *bm, const bool do_tessellate);
  BMEditMesh *BKE_editmesh_copy(BMEditMesh *em);
  BMEditMesh *BKE_editmesh_from_object(struct Object *ob);
  void BKE_editmesh_free_derivedmesh(BMEditMesh *em);
  void BKE_editmesh_free(BMEditMesh *em);
  
  void BKE_editmesh_color_free(BMEditMesh *em);
  void BKE_editmesh_color_ensure(BMEditMesh *em, const char htype);
  float (*BKE_editmesh_vert_coords_alloc_orco(BMEditMesh *em, int *r_vert_len))[3];
  void BKE_editmesh_lnorspace_update(BMEditMesh *em);
  void BKE_editmesh_ensure_autosmooth(BMEditMesh *em);
  
  /* editderivedmesh.c */
  /* should really be defined in editmesh.c, but they use 'EditDerivedBMesh' */
  void BKE_editmesh_statvis_calc(BMEditMesh *em,
                                 struct EditMeshData *emd,
                                 const struct MeshStatVis *statvis);
  
  float (*BKE_editmesh_vert_coords_alloc(
      struct Depsgraph *depsgraph, struct BMEditMesh *em, struct Scene *scene, int *r_vert_len))[3];
  
  #endif /* __BKE_EDITMESH_H__ */
  