62 lines
2.3 KiB
C++
62 lines
2.3 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): Janne Karhu
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* Brecht Van Lommel
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*
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* ***** END GPL LICENSE BLOCK *****
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*/
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#ifndef __BLI_KDTREE_H__
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#define __BLI_KDTREE_H__
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/** \file BLI_kdtree.h
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* \ingroup bli
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* \brief A kd-tree for nearest neighbor search.
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* \author Janne Karhu
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* \author Brecht van Lommel
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*/
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struct KDTree;
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typedef struct KDTree KDTree;
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typedef struct KDTreeNearest {
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int index;
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float dist;
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float co[3];
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} KDTreeNearest;
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/* Creates or free a kdtree */
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KDTree *BLI_kdtree_new(int maxsize);
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void BLI_kdtree_free(KDTree *tree);
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/* Construction: first insert points, then call balance. Normal is optional. */
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void BLI_kdtree_insert(KDTree *tree, int index, const float co[3], const float nor[3]);
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void BLI_kdtree_balance(KDTree *tree);
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/* Find nearest returns index, and -1 if no node is found.
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* Find n nearest returns number of points found, with results in nearest.
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* Normal is optional, but if given will limit results to points in normal direction from co. */
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int BLI_kdtree_find_nearest(KDTree *tree, const float co[3], const float nor[3], KDTreeNearest *nearest);
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int BLI_kdtree_find_n_nearest(KDTree *tree, int n, const float co[3], const float nor[3], KDTreeNearest *nearest);
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/* Range search returns number of points found, with results in nearest */
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/* Normal is optional, but if given will limit results to points in normal direction from co. */
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/* Remember to free nearest after use! */
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int BLI_kdtree_range_search(KDTree *tree, float range, const float co[3], const float nor[3], KDTreeNearest **nearest);
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#endif
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