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/**
* $Id$
* ***** BEGIN GPL/BL DUAL LICENSE BLOCK *****
*
* 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. The Blender
* Foundation also sells licenses for use in proprietary software under
* the Blender License. See http://www.blender.org/BL/ for information
* about this.
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
* All rights reserved.
*
* The Original Code is: all of this file.
*
* Contributor(s): none yet.
*
* ***** END GPL/BL DUAL LICENSE BLOCK *****
*/
/**
* @author Laurence Bourn
* @date 6/7/2001
*
* This is the external interface for the decimation module.
*/
#ifndef NAN_INCLUDED_LOD_decimation_h
#define NAN_INCLUDED_LOD_decimation_h
#ifdef __cplusplus
extern "C" {
#endif
/**
* External decimation structure
*/
typedef struct LOD_Decimation_Info {
float * vertex_buffer;
float * vertex_normal_buffer;
int * triangle_index_buffer;
int vertex_num;
int face_num;
void * intern;
} LOD_Decimation_Info;
typedef LOD_Decimation_Info* LOD_Decimation_InfoPtr;
/**
* Create internal mesh representation from
* LOD_Decimation_Info structure.
* @return 1 on successful loading
* @return 0 on failure
* @warning This should be changed to return an enumeration
* detailing the error encountered
*/
extern int LOD_LoadMesh(LOD_Decimation_InfoPtr info);
/**
* Allocate and Compute internal data strucures required for
* decimation.
* @return 1 on successful computation of data
* @return 0 on failure
* @warning This should be changed to return an enumeration
* detailing the error encountered
*/
extern int LOD_PreprocessMesh(LOD_Decimation_InfoPtr info);
/**
* Once both the stages above have been completed
* this function collapses a single edge in the mesh.
* The LOD_Decimation_Info structure is updated
* to represent the new mesh.
* @return 1 if an edge was collapsed.
* @return 0 if no suitable edge was found to be collapsable
* You should stop calling this method in this case
* @warning Do not expect that the order of polygons, vertices or
* vertex normals will be preserved by this operation. This function
* returns a packed array of polygons and vertices and so necessarily
* the order will be different. This means you should not expect to
* find the same polygon in the same place in the polygon array after
* this function has been called.
*/
extern int LOD_CollapseEdge(LOD_Decimation_InfoPtr info);
/**
* Free any memory the decimation process used
* during the decimation process
* @return 1 if internal data successfully freed
* @return 0 if no data was freed
*/
extern int LOD_FreeDecimationData(LOD_Decimation_InfoPtr);
#ifdef __cplusplus
}
#endif
#endif // NAN_INCLUDED_LOD_decimation_h
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