blender-archive/source/blender/bmesh/bmesh_class.h

/*
 * ***** 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.
 *
 * 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.
 *
 * Contributor(s): Geoffrey Bantle, Levi Schooley, Joseph Eagar.
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#ifndef _BMESH_CLASS_H
#define _BMESH_CLASS_H

/*bmesh data structures*/

#include "DNA_listBase.h"

#include "BKE_utildefines.h"
#include "BLI_utildefines.h"

struct BMesh;
struct BMVert;
struct BMEdge;
struct BMLoop;
struct BMFace;
struct BMFlagLayer;
struct BMLayerType;
struct BMSubClassLayer;

struct BLI_mempool;
struct Object;

/*note: it is very important for BMHeader to start with two
  pointers. this is a requirement of mempool's method of
  iteration.
*/
typedef struct BMHeader {
	void *data; /* customdata layers */
	struct BMFlagLayer *flags;
	int index; /* notes:
	            * - Use BM_GetIndex/SetIndex macros for index
	            * - Unitialized to -1 so we can easily tell its not set.
	            * - Used for edge/vert/face, check BMesh.elem_index_dirty for valid index values,
	            *   this is abused by various tools which set it dirty.
	            * - For loops this is used for sorting during tesselation. */

	char htype; /* element geometric type (verts/edges/loops/faces) */
	char hflag; /* this would be a CD layer, see below */
} BMHeader;

/*note: need some way to specify custom locations for custom data layers.  so we can
make them point directly into structs.  and some way to make it only happen to the
active layer, and properly update when switching active layers.*/

typedef struct BMVert {
	BMHeader head;
	float co[3];
	float no[3];
	struct BMEdge *e;
} BMVert;

typedef struct BMEdge {
	BMHeader head;
	struct BMVert *v1, *v2;
	struct BMLoop *l;
	
	/*disk cycle pointers*/
	struct {
		struct BMEdge *next, *prev;
	} dlink1;
	struct {
		struct BMEdge *next, *prev;
	} dlink2;
} BMEdge;

typedef struct BMLoop {
	BMHeader head;
	struct BMVert *v;
	struct BMEdge *e;
	struct BMFace *f;

	struct BMLoop *radial_next, *radial_prev;
	
	/*private variables*/
	struct BMLoop *next, *prev; /* won't be able to use listbase API, ger, due to head */
} BMLoop;

/* eventually, this structure will be used for supporting holes in faces */
typedef struct BMLoopList {
	struct BMLoopList *next, *prev;
	struct BMLoop *first, *last;
} BMLoopList;

typedef struct BMFace {
	BMHeader head;
	int len; /*includes all boundary loops*/
	int totbounds; /*total boundaries, is one plus the number of holes in the face*/
	ListBase loops;
	float no[3]; /*yes, we do store this here*/
	short mat_nr;
} BMFace;

typedef struct BMFlagLayer {
	short f, pflag; /* flags */
} BMFlagLayer;

typedef struct BMesh {
	int totvert, totedge, totloop, totface;
	int totvertsel, totedgesel, totfacesel;

	/* flag index arrays as being dirty so we can check if they are clean and
	 * avoid looping over the entire vert/edge/face array in those cases.
	 * valid flags are - BM_VERT | BM_EDGE | BM_FACE.
	 * BM_LOOP isnt handled so far. */
	char elem_index_dirty;
	
	/*element pools*/
	struct BLI_mempool *vpool, *epool, *lpool, *fpool;

	/*operator api stuff*/
	struct BLI_mempool *toolflagpool;
	int stackdepth;
	struct BMOperator *currentop;
	
	CustomData vdata, edata, ldata, pdata;

	struct BLI_mempool *looplistpool;
	
	/* should be copy of scene select mode */
	/* stored in BMEditMesh too, this is a bit confusing,
	 * make sure the're in sync!
	 * Only use when the edit mesh cant be accessed - campbell */
	short selectmode;
	
	/*ID of the shape key this bmesh came from*/
	int shapenr;
	
	int walkers, totflags;
	ListBase selected, error_stack;
	
	BMFace *act_face;

	ListBase errorstack;
	struct Object *ob; /* owner object */
	
	int opflag; /* current operator flag */
} BMesh;

BMFace *BM_Copy_Face(BMesh *bm, BMFace *f, int copyedges, int copyverts);

#define BM_VERT		1
#define BM_EDGE		2
#define BM_LOOP		4
#define BM_FACE		8

#endif /* _BMESH_CLASS_H */