multires_unsubdivide.h

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/*
 * 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.
 *
 * The Original Code is Copyright (C) 2020 Blender Foundation.
 * All rights reserved.
 */
 
#pragma once
 
#include "BLI_sys_types.h"
 
struct BMesh;
struct Mesh;
struct MultiresModifierData;
 
typedef struct MultiresUnsubdivideGrid {
  /* For sanity checks. */
  int grid_index;
  int grid_size;
 
  float (*grid_co)[3];
 
} MultiresUnsubdivideGrid;
 
typedef struct MultiresUnsubdivideContext {
  /* Input Mesh to un-subdivide. */
  struct Mesh *original_mesh;
  struct MDisps *original_mdisp;
 
  int num_original_levels;
 
  struct Mesh *base_mesh;
 
  int max_new_levels;
 
  int num_new_levels;
 
  int num_total_levels;
 
  int num_grids;
  struct MultiresUnsubdivideGrid *base_mesh_grids;
 
  /* Private data. */
  struct BMesh *bm_original_mesh;
  int *loop_to_face_map;
  int *base_to_orig_vmap;
} MultiresUnsubdivideContext;
 
/* --------------------------------------------------------------------
 * Construct/destruct reshape context.
 */
 
void multires_unsubdivide_context_init(MultiresUnsubdivideContext *context,
                                       struct Mesh *original_mesh,
                                       struct MultiresModifierData *mmd);
void multires_unsubdivide_context_free(MultiresUnsubdivideContext *context);
 
/* --------------------------------------------------------------------
 * Rebuild Lower Subdivisions.
 */
 
/* Rebuilds all subdivision to the level 0 base mesh. */
bool multires_unsubdivide_to_basemesh(MultiresUnsubdivideContext *context);