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diff --git a/source/blender/blenlib/BLI_kdopbvh.h b/source/blender/blenlib/BLI_kdopbvh.h
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+++ b/source/blender/blenlib/BLI_kdopbvh.h
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+/**
+ *
+ * $Id$
+ *
+ * ***** BEGIN GPL LICENSE BLOCK *****
+ *
+ * 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.
+ *
+ * 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) 2006 by NaN Holding BV.
+ * All rights reserved.
+ *
+ * The Original Code is: all of this file.
+ *
+ * Contributor(s): Daniel Genrich, Andre Pinto
+ *
+ * ***** END GPL LICENSE BLOCK *****
+ */
+
+
+#ifndef BLI_KDOPBVH_H
+#define BLI_KDOPBVH_H
+
+#include <float.h>
+
+struct BVHTree;
+typedef struct BVHTree BVHTree;
+
+typedef struct BVHTreeOverlap {
+	int indexA;
+	int indexB;
+} BVHTreeOverlap;
+
+typedef struct BVHTreeNearest
+{
+	int index;			/* the index of the nearest found (untouched if none is found within a dist radius from the given coordinates) */
+	float co[3];		/* nearest coordinates (untouched it none is found within a dist radius from the given coordinates) */
+	float no[3];		/* normal at nearest coordinates (untouched it none is found within a dist radius from the given coordinates) */
+	float dist;			/* squared distance to search arround */
+} BVHTreeNearest;
+
+typedef struct BVHTreeRay
+{
+	float origin[3];	/* ray origin */
+	float direction[3];	/* ray direction */
+	float radius;		/* radius around ray */
+} BVHTreeRay;
+
+typedef struct BVHTreeRayHit
+{
+	int index;			/* index of the tree node (untouched if no hit is found) */
+	float co[3];		/* coordinates of the hit point */
+	float no[3];		/* normal on hit point */
+	float dist;			/* distance to the hit point */
+} BVHTreeRayHit;
+
+/* callback must update nearest in case it finds a nearest result */
+typedef void (*BVHTree_NearestPointCallback) (void *userdata, int index, const float *co, BVHTreeNearest *nearest);
+
+/* callback must update hit in case it finds a nearest successful hit */
+typedef void (*BVHTree_RayCastCallback) (void *userdata, int index, const BVHTreeRay *ray, BVHTreeRayHit *hit);
+
+
+BVHTree *BLI_bvhtree_new(int maxsize, float epsilon, char tree_type, char axis);
+void BLI_bvhtree_free(BVHTree *tree);
+
+/* construct: first insert points, then call balance */
+int BLI_bvhtree_insert(BVHTree *tree, int index, float *co, int numpoints);
+void BLI_bvhtree_balance(BVHTree *tree);
+
+/* update: first update points/nodes, then call update_tree to refit the bounding volumes */
+int BLI_bvhtree_update_node(BVHTree *tree, int index, float *co, float *co_moving, int numpoints);
+void BLI_bvhtree_update_tree(BVHTree *tree);
+
+/* collision/overlap: check two trees if they overlap, alloc's *overlap with length of the int return value */
+BVHTreeOverlap *BLI_bvhtree_overlap(BVHTree *tree1, BVHTree *tree2, int *result);
+
+float BLI_bvhtree_getepsilon(BVHTree *tree);
+
+/* find nearest node to the given coordinates (if nearest is given it will only search nodes where square distance is smaller than nearest->dist) */
+int BLI_bvhtree_find_nearest(BVHTree *tree, const float *co, BVHTreeNearest *nearest, BVHTree_NearestPointCallback callback, void *userdata);
+
+int BLI_bvhtree_ray_cast(BVHTree *tree, const float *co, const float *dir, float radius, BVHTreeRayHit *hit, BVHTree_RayCastCallback callback, void *userdata);
+
+#endif // BLI_KDOPBVH_H
+