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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);
float BLI_bvhtree_bb_raycast(float *bv, float *light_start, float *light_end, float *pos);
#endif // BLI_KDOPBVH_H
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