95 lines
2.9 KiB
C
95 lines
2.9 KiB
C
/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* The Original Code is Copyright (C) 2020 Blender Foundation.
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* All rights reserved.
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*/
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/** \file
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* \ingroup bke
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*/
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#ifndef __BKE_INTERN_MULTIRES_UNSUBDIVIDE_H__
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#define __BKE_INTERN_MULTIRES_UNSUBDIVIDE_H__
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#include "BLI_sys_types.h"
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struct BMesh;
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struct Depsgraph;
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struct Mesh;
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struct MultiresModifierData;
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struct Object;
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typedef struct MultiresUnsubdivideGrid {
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/* For sanity checks. */
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int grid_index;
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int grid_size;
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/** Grid coordinates in object space. */
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float (*grid_co)[3];
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} MultiresUnsubdivideGrid;
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typedef struct MultiresUnsubdivideContext {
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/* Input Mesh to un-subdivide. */
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struct Mesh *original_mesh;
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struct MDisps *original_mdisp;
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/** Number of subdivision in the grids of the input mesh. */
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int num_original_levels;
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/** Level 0 base mesh after applying the maximum amount of unsubdivisions. */
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struct Mesh *base_mesh;
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/** Limit on how many levels down the unsubdivide operation should create, if possible. */
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int max_new_levels;
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/** New levels that were created after unsubdividing. */
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int num_new_levels;
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/**
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* Number of subdivisions that should be applied to the base mesh.
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* (num_new_levels + num_original_levels).
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*/
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int num_total_levels;
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/** Data for the new grids, indexed by base mesh loop index. */
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int num_grids;
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struct MultiresUnsubdivideGrid *base_mesh_grids;
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/* Private data. */
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struct BMesh *bm_original_mesh;
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int *loop_to_face_map;
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int *base_to_orig_vmap;
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} MultiresUnsubdivideContext;
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/* --------------------------------------------------------------------
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* Construct/destruct reshape context.
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*/
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void multires_unsubdivide_context_init(MultiresUnsubdivideContext *context,
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struct Mesh *original_mesh,
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struct MultiresModifierData *mmd);
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void multires_unsubdivide_context_free(MultiresUnsubdivideContext *context);
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/* --------------------------------------------------------------------
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* Rebuild Lower Subdivisions.
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*/
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/* Rebuilds all subdivision to the level 0 base mesh. */
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bool multires_unsubdivide_to_basemesh(MultiresUnsubdivideContext *context);
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#endif /* __BKE_INTERN_MULTIRES_UNSUBDIVIDE_H__ */
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