133 lines
4.5 KiB
C++
133 lines
4.5 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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/*
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* 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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#ifndef BM_ITERATORS_H
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#define BM_ITERATORS_H
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#include "BLI_mempool.h"
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/* Defines for passing to BMIter_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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#define BM_VERTS_OF_MESH 1
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#define BM_EDGES_OF_MESH 2
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#define BM_FACES_OF_MESH 3
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/*these are topological iterators.*/
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#define BM_EDGES_OF_VERT 4
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#define BM_FACES_OF_VERT 5
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#define BM_LOOPS_OF_VERT 6
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#define BM_FACES_OF_EDGE 7
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#define BM_VERTS_OF_FACE 8
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#define BM_EDGES_OF_FACE 9
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#define BM_LOOPS_OF_FACE 10
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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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#define BM_ALL_LOOPS_OF_FACE 11
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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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#define BM_LOOPS_OF_LOOP 12
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#define BM_LOOPS_OF_EDGE 13
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#define BM_ITER(ele, iter, bm, itype, data) \
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ele = BMIter_New(iter, bm, itype, data); \
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for ( ; ele; ele=BMIter_Step(iter))
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#define BM_ITER_INDEX(ele, iter, bm, itype, data, indexvar) \
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ele = BMIter_New(iter, bm, itype, data); \
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for (indexvar=0; ele; indexvar++, ele=BMIter_Step(iter))
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/*Iterator Structure*/
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typedef struct BMIter {
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BLI_mempool_iter pooliter;
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struct BMVert *firstvert, *nextvert, *vdata;
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struct BMEdge *firstedge, *nextedge, *edata;
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struct BMLoop *firstloop, *nextloop, *ldata, *l;
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struct BMFace *firstpoly, *nextpoly, *pdata;
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struct BMesh *bm;
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void (*begin)(struct BMIter *iter);
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void *(*step)(struct BMIter *iter);
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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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int count;
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char itype;
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} BMIter;
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void *BMIter_AtIndex(struct BMesh *bm, const char htype, void *data, int index);
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int BMIter_AsArray(struct BMesh *bm, const char htype, void *data, void **array, const int len);
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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_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.c"
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#endif
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