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/*
* 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.
*
*/
#ifndef BM_ITERATORS_H
#define BM_ITERATORS_H
#include "BLI_mempool.h"
/*Defines for passing to BMIter_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.*/
#define BM_VERTS_OF_MESH 1
#define BM_EDGES_OF_MESH 2
#define BM_FACES_OF_MESH 3
/*these are topological iterators.*/
#define BM_EDGES_OF_VERT 4
#define BM_FACES_OF_VERT 5
#define BM_LOOPS_OF_VERT 6
#define BM_FACES_OF_EDGE 7
#define BM_VERTS_OF_FACE 8
#define BM_EDGES_OF_FACE 9
#define BM_LOOPS_OF_FACE 10
/*returns elements from all boundaries, and returns
the first element at the end to flag that we're entering
a different face hole boundary*/
#define BM_ALL_LOOPS_OF_FACE 11
/*iterate through loops around this loop, which are fetched
from the other faces in the radial cycle surrounding the
input loop's edge.*/
#define BM_LOOPS_OF_LOOP 12
#define BM_LOOPS_OF_EDGE 13
#define BM_ITER(ele, iter, bm, type, data) \
ele = BMIter_New(iter, bm, type, data); \
for ( ; ele; ele=BMIter_Step(iter))
#define BM_ITER_INDEX(ele, iter, bm, type, data, indexvar) \
ele = BMIter_New(iter, bm, type, data); \
for (indexvar=0; ele; indexvar++, ele=BMIter_Step(iter))
/*Iterator Structure*/
typedef struct BMIter {
BLI_mempool_iter pooliter;
struct BMVert *firstvert, *nextvert, *vdata;
struct BMEdge *firstedge, *nextedge, *edata;
struct BMLoop *firstloop, *nextloop, *ldata, *l;
struct BMFace *firstpoly, *nextpoly, *pdata;
struct BMesh *bm;
void (*begin)(struct BMIter *iter);
void *(*step)(struct BMIter *iter);
union{
void *p;
int i;
long l;
float f;
} filter;
int htype, count;
}BMIter;
void *BMIter_New(struct BMIter *iter, struct BMesh *bm, const char htype, void *data);
void *BMIter_Step(struct BMIter *iter);
void *BMIter_AtIndex(struct BMesh *bm, const char htype, void *data, int index);
#endif
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