/**
 * bmesh_private.h    jan 2007
 *
 *	Private function prototypes for bmesh public API.
 *  This file is a grab-bag of functions from various
 *  parts of the bmesh internals.
 *
 *
 * $Id: BKE_bmesh.h,v 1.00 2007/01/17 17:42:01 Briggs Exp $
 *
 * ***** BEGIN GPL 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) 2004 Blender Foundation.
 * All rights reserved.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s): Geoffrey Bantle.
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#ifndef BMESH_PRIVATE_H
#define BMESH_PRIVATE_H

#include "bmesh.h"
struct Link;
struct BMLoop;

/*returns positive nonzero on error*/
int bmesh_check_element(BMesh *bm, void *element, int type);

#define CHECK_ELEMENT(bm, el) \
if (bmesh_check_element(bm, el, ((BMHeader*)el)->type))\
		printf("check_element failure, with code %i on line %i in file\n    \"%s\"\n\n", bmesh_check_element(bm, el, ((BMHeader*)el)->type), __LINE__, __FILE__);

#define bm_get_edge_link(e, v) (Link*)((v) == ((BMEdge*)(e))->v1 ? &(((BMEdge*)(e))->dlink1) : &(((BMEdge*)(e))->dlink2))

int bmesh_radial_length(struct BMLoop *l);
int bmesh_disk_count(BMVert *v);

/*start/stop edit*/
void bmesh_begin_edit(struct BMesh *bm);
void bmesh_end_edit(struct BMesh *bm, int flag);

/*internal selection flushing*/
void bmesh_selectmode_flush(struct BMesh *bm);

/*internal filter API*/
void *bmesh_get_filter_callback(int type);
int bmesh_get_filter_argtype(int type);

/*system flag access*/
void bmesh_set_sysflag(struct BMHeader *element, int flag);
void bmesh_clear_sysflag(struct BMHeader *element, int flag);
int bmesh_test_sysflag(struct BMHeader *element, int flag);

/*NOTE: ensure different parts of the API do not conflict
  on using these internal flags!*/
#define _FLAG_JF	1 /*join faces*/
#define _FLAG_SF	2 /*split faces*/
#define _FLAG_MF	4 /*make face*/

#define bmesh_api_setflag(element, f) (((BMHeader*)(element))->flags[0].pflag |= (f))
#define bmesh_api_getflag(element, f) (((BMHeader*)(element))->flags[0].pflag & (f))
#define bmesh_api_clearflag(element, f) (((BMHeader*)(element))->flags[0].pflag &= ~(f))

/*Polygon Utilities ? FIXME... where do these each go?*/
/*newedgeflag sets a flag layer flag, obviously not the header flag.*/
void BM_Triangulate_Face(BMesh *bm, BMFace *f, float (*projectverts)[3], 
                         int newedgeflag, int newfaceflag, BMFace **newfaces);
void bmesh_update_face_normal(struct BMesh *bm, struct BMFace *f, 
                              float (*projectverts)[3]);
void compute_poly_plane(float (*verts)[3], int nverts);
void poly_rotate_plane(float normal[3], float (*verts)[3], int nverts);
void bmesh_flip_normal(struct BMesh *bm, struct BMFace *f);

/*Error reporting. Shouldnt be called by tools ever.*/
void BME_error(void);

BMEdge *bmesh_disk_next(BMEdge *e, BMVert *v);
BMEdge *bmesh_disk_prev(BMEdge *e, BMVert *v);

/*include the rest of our private declarations*/
#include "bmesh_structure.h"
#include "bmesh_operators_private.h"

#endif
