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blender-archive/source/blender/blenlib/BLI_kdtree.h

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/**
* A kd-tree for nearest neighbour search.
*
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* $Id$
*
* ***** BEGIN GPL LICENSE BLOCK *****
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*
* 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.
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*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
* All rights reserved.
*
* The Original Code is: none of this file.
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*
* Contributor(s): Janne Karhu
* Brecht Van Lommel
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*
* ***** END GPL LICENSE BLOCK *****
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*/
#ifndef BLI_KDTREE_H
#define BLI_KDTREE_H
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struct KDTree;
typedef struct KDTree KDTree;
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typedef struct KDTreeNearest {
int index;
float dist;
float co[3];
} KDTreeNearest;
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/* Creates or free a kdtree */
KDTree* BLI_kdtree_new(int maxsize);
void BLI_kdtree_free(KDTree *tree);
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/* Construction: first insert points, then call balance. Normal is optional. */
void BLI_kdtree_insert(KDTree *tree, int index, float *co, float *nor);
void BLI_kdtree_balance(KDTree *tree);
/* Find nearest returns index, and -1 if no node is found.
* Find n nearest returns number of points found, with results in nearest.
* Normal is optional. */
int BLI_kdtree_find_nearest(KDTree *tree, float *co, float *nor, KDTreeNearest *nearest);
int BLI_kdtree_find_n_nearest(KDTree *tree, int n, float *co, float *nor, KDTreeNearest *nearest);
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#endif
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