168 lines
5.8 KiB
C
168 lines
5.8 KiB
C
/*
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* ***** BEGIN GPL LICENSE BLOCK *****
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* Contributor(s): Joseph Eagar.
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*
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* ***** END GPL LICENSE BLOCK *****
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*/
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#ifndef __BMESH_ITERATORS_H__
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#define __BMESH_ITERATORS_H__
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/** \file blender/bmesh/intern/bmesh_iterators.h
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* \ingroup bmesh
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*/
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/**
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* \brief BMesh Iterators
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*
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* The functions and structures in this file
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* provide a unified method for iterating over
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* the elements of a mesh and answering simple
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* adjacency queries. Tool authors should use
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* the iterators provided in this file instead
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* of inspecting the structure directly.
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*
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*/
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#include "BLI_mempool.h"
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/* Defines for passing to BM_iter_new.
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*
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* "OF" can be substituted for "around"
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* so BM_VERTS_OF_FACE means "vertices
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* around a face."
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*/
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/* these iterator over all elements of a specific
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* type in the mesh.
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*
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* be sure to keep 'bm_iter_itype_htype_map' in sync with any changes
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*/
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typedef enum BMIterType {
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BM_VERTS_OF_MESH = 1,
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BM_EDGES_OF_MESH = 2,
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BM_FACES_OF_MESH = 3,
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/* these are topological iterators. */
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BM_EDGES_OF_VERT = 4,
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BM_FACES_OF_VERT = 5,
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BM_LOOPS_OF_VERT = 6,
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BM_VERTS_OF_EDGE = 7, /* just v1, v2: added so py can use generalized sequencer wrapper */
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BM_FACES_OF_EDGE = 8,
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BM_VERTS_OF_FACE = 9,
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BM_EDGES_OF_FACE = 10,
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BM_LOOPS_OF_FACE = 11,
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/* returns elements from all boundaries, and returns
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* the first element at the end to flag that we're entering
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* a different face hole boundary*/
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BM_ALL_LOOPS_OF_FACE = 12,
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/* iterate through loops around this loop, which are fetched
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* from the other faces in the radial cycle surrounding the
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* input loop's edge.*/
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BM_LOOPS_OF_LOOP = 13,
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BM_LOOPS_OF_EDGE = 14
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} BMIterType;
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#define BM_ITYPE_MAX 15
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/* the iterator htype for each iterator */
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extern const char bm_iter_itype_htype_map[BM_ITYPE_MAX];
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#define BM_ITER_MESH(ele, iter, bm, itype) \
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for (ele = BM_iter_new(iter, bm, itype, NULL); ele; ele = BM_iter_step(iter))
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#define BM_ITER_MESH_INDEX(ele, iter, bm, itype, indexvar) \
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for (ele = BM_iter_new(iter, bm, itype, NULL), indexvar = 0; ele; ele = BM_iter_step(iter), (indexvar)++)
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#define BM_ITER_ELEM(ele, iter, data, itype) \
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for (ele = BM_iter_new(iter, NULL, itype, data); ele; ele = BM_iter_step(iter))
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#define BM_ITER_ELEM_INDEX(ele, iter, data, itype, indexvar) \
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for (ele = BM_iter_new(iter, NULL, itype, data), indexvar = 0; ele; ele = BM_iter_step(iter), (indexvar)++)
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/* Iterator Structure */
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/* note: some of these vars are not used,
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* so they have beem commented to save stack space since this struct is used all over */
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typedef struct BMIter {
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BLI_mempool_iter pooliter;
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BMVert /* *v_first, *v_next, */ *vdata;
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BMEdge *e_first, *e_next, *edata;
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BMLoop *l_first, *l_next, *ldata;
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BMFace /* *f_first, *f_next, */ *pdata;
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BMesh *bm;
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void (*begin)(struct BMIter *iter);
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void *(*step)(struct BMIter *iter);
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#if 0
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union {
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void *p;
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int i;
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long l;
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float f;
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} filter;
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#endif
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int count; /* note, only some iterators set this, don't rely on it */
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char itype;
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} BMIter;
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void *BM_iter_at_index(BMesh *bm, const char itype, void *data, int index)
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#ifdef __GNUC__
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__attribute__((warn_unused_result))
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#endif
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;
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int BM_iter_as_array(BMesh *bm, const char itype, void *data, void **array, const int len);
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void *BM_iter_as_arrayN(BMesh *bm, const char itype, void *data, int *r_len,
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void **stack_array, int stack_array_size)
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#ifdef __GNUC__
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__attribute__((warn_unused_result))
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#endif
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;
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int BM_iter_elem_count_flag(const char itype, void *data, const char hflag, const bool value);
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int BM_iter_mesh_count_flag(const char itype, BMesh *bm, const char hflag, const bool value);
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/* private for bmesh_iterators_inline.c */
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void bmiter__vert_of_mesh_begin(struct BMIter *iter);
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void *bmiter__vert_of_mesh_step(struct BMIter *iter);
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void bmiter__edge_of_mesh_begin(struct BMIter *iter);
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void *bmiter__edge_of_mesh_step(struct BMIter *iter);
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void bmiter__face_of_mesh_begin(struct BMIter *iter);
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void *bmiter__face_of_mesh_step(struct BMIter *iter);
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void bmiter__edge_of_vert_begin(struct BMIter *iter);
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void *bmiter__edge_of_vert_step(struct BMIter *iter);
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void bmiter__face_of_vert_begin(struct BMIter *iter);
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void *bmiter__face_of_vert_step(struct BMIter *iter);
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void bmiter__loop_of_vert_begin(struct BMIter *iter);
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void *bmiter__loop_of_vert_step(struct BMIter *iter);
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void bmiter__loops_of_edge_begin(struct BMIter *iter);
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void *bmiter__loops_of_edge_step(struct BMIter *iter);
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void bmiter__loops_of_loop_begin(struct BMIter *iter);
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void *bmiter__loops_of_loop_step(struct BMIter *iter);
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void bmiter__face_of_edge_begin(struct BMIter *iter);
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void *bmiter__face_of_edge_step(struct BMIter *iter);
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void bmiter__vert_of_edge_begin(struct BMIter *iter);
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void *bmiter__vert_of_edge_step(struct BMIter *iter);
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void bmiter__vert_of_face_begin(struct BMIter *iter);
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void *bmiter__vert_of_face_step(struct BMIter *iter);
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void bmiter__edge_of_face_begin(struct BMIter *iter);
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void *bmiter__edge_of_face_step(struct BMIter *iter);
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void bmiter__loop_of_face_begin(struct BMIter *iter);
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void *bmiter__loop_of_face_step(struct BMIter *iter);
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#include "intern/bmesh_iterators_inline.h"
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#endif /* __BMESH_ITERATORS_H__ */
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