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/*
* ***** 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): Joseph Eagar.
*
* ***** END GPL LICENSE BLOCK *****
*/
#ifndef __BMESH_ITERATORS_H__
#define __BMESH_ITERATORS_H__
/** \file blender/bmesh/intern/bmesh_iterators.h
* \ingroup bmesh
*/
/**
* \brief BMesh Iterators
*
* The functions and structures in this file
* provide a unified method for iterating over
* the elements of a mesh and answering simple
* adjacency queries. Tool authors should use
* the iterators provided in this file instead
* of inspecting the structure directly.
*
*/
#include "BLI_mempool.h"
/* Defines for passing to BM_iter_new.
*
* "OF" can be substituted for "around"
* so BM_VERTS_OF_FACE means "vertices
* around a face."
*/
/* these iterator over all elements of a specific
* type in the mesh.
*
* be sure to keep 'bm_iter_itype_htype_map' in sync with any changes
*/
typedef enum BMIterType {
BM_VERTS_OF_MESH = 1,
BM_EDGES_OF_MESH = 2,
BM_FACES_OF_MESH = 3,
/* these are topological iterators. */
BM_EDGES_OF_VERT = 4,
BM_FACES_OF_VERT = 5,
BM_LOOPS_OF_VERT = 6,
BM_VERTS_OF_EDGE = 7, /* just v1, v2: added so py can use generalized sequencer wrapper */
BM_FACES_OF_EDGE = 8,
BM_VERTS_OF_FACE = 9,
BM_EDGES_OF_FACE = 10,
BM_LOOPS_OF_FACE = 11,
/* returns elements from all boundaries, and returns
* the first element at the end to flag that we're entering
* a different face hole boundary*/
BM_ALL_LOOPS_OF_FACE = 12,
/* iterate through loops around this loop, which are fetched
* from the other faces in the radial cycle surrounding the
* input loop's edge.*/
BM_LOOPS_OF_LOOP = 13,
BM_LOOPS_OF_EDGE = 14
} BMIterType;
#define BM_ITYPE_MAX 15
/* the iterator htype for each iterator */
extern const char bm_iter_itype_htype_map[BM_ITYPE_MAX];
#define BM_ITER_MESH(ele, iter, bm, itype) \
for (ele = BM_iter_new(iter, bm, itype, NULL); ele; ele = BM_iter_step(iter))
#define BM_ITER_MESH_INDEX(ele, iter, bm, itype, indexvar) \
for (ele = BM_iter_new(iter, bm, itype, NULL), indexvar = 0; ele; ele = BM_iter_step(iter), (indexvar)++)
#define BM_ITER_ELEM(ele, iter, data, itype) \
for (ele = BM_iter_new(iter, NULL, itype, data); ele; ele = BM_iter_step(iter))
#define BM_ITER_ELEM_INDEX(ele, iter, data, itype, indexvar) \
for (ele = BM_iter_new(iter, NULL, itype, data), indexvar = 0; ele; ele = BM_iter_step(iter), (indexvar)++)
/* Iterator Structure */
typedef struct BMIter {
BLI_mempool_iter pooliter;
BMVert *firstvert, *nextvert, *vdata;
BMEdge *firstedge, *nextedge, *edata;
BMLoop *firstloop, *nextloop, *ldata, *l;
BMFace *firstpoly, *nextpoly, *pdata;
BMesh *bm;
void (*begin)(struct BMIter *iter);
void *(*step)(struct BMIter *iter);
union {
void *p;
int i;
long l;
float f;
} filter;
int count;
char itype;
} BMIter;
void *BM_iter_at_index(BMesh *bm, const char itype, void *data, int index);
int BM_iter_as_array(BMesh *bm, const char itype, void *data, void **array, const int len);
/* private for bmesh_iterators_inline.c */
void bmiter__vert_of_mesh_begin(struct BMIter *iter);
void *bmiter__vert_of_mesh_step(struct BMIter *iter);
void bmiter__edge_of_mesh_begin(struct BMIter *iter);
void *bmiter__edge_of_mesh_step(struct BMIter *iter);
void bmiter__face_of_mesh_begin(struct BMIter *iter);
void *bmiter__face_of_mesh_step(struct BMIter *iter);
void bmiter__edge_of_vert_begin(struct BMIter *iter);
void *bmiter__edge_of_vert_step(struct BMIter *iter);
void bmiter__face_of_vert_begin(struct BMIter *iter);
void *bmiter__face_of_vert_step(struct BMIter *iter);
void bmiter__loop_of_vert_begin(struct BMIter *iter);
void *bmiter__loop_of_vert_step(struct BMIter *iter);
void bmiter__loops_of_edge_begin(struct BMIter *iter);
void *bmiter__loops_of_edge_step(struct BMIter *iter);
void bmiter__loops_of_loop_begin(struct BMIter *iter);
void *bmiter__loops_of_loop_step(struct BMIter *iter);
void bmiter__face_of_edge_begin(struct BMIter *iter);
void *bmiter__face_of_edge_step(struct BMIter *iter);
void bmiter__vert_of_edge_begin(struct BMIter *iter);
void *bmiter__vert_of_edge_step(struct BMIter *iter);
void bmiter__vert_of_face_begin(struct BMIter *iter);
void *bmiter__vert_of_face_step(struct BMIter *iter);
void bmiter__edge_of_face_begin(struct BMIter *iter);
void *bmiter__edge_of_face_step(struct BMIter *iter);
void bmiter__loop_of_face_begin(struct BMIter *iter);
void *bmiter__loop_of_face_step(struct BMIter *iter);
#include "intern/bmesh_iterators_inline.h"
#endif /* __BMESH_ITERATORS_H__ */
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