181 lines
6.5 KiB
C
181 lines
6.5 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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* The Original Code is Copyright (C) 2006 by NaN Holding BV.
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* All rights reserved.
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*
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* The Original Code is: all of this file.
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*
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* Contributor(s): Daniel Genrich, Andre Pinto
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*
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* ***** END GPL LICENSE BLOCK *****
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*/
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#ifndef __BLI_KDOPBVH_H__
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#define __BLI_KDOPBVH_H__
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/** \file BLI_kdopbvh.h
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* \ingroup bli
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* \author Daniel Genrich
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* \author Andre Pinto
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*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct BVHTree;
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typedef struct BVHTree BVHTree;
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#define USE_KDOPBVH_WATERTIGHT
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typedef struct BVHTreeAxisRange {
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union {
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struct {
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float min, max;
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};
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/* alternate access */
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float range[2];
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};
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} BVHTreeAxisRange;
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typedef struct BVHTreeOverlap {
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int indexA;
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int indexB;
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} BVHTreeOverlap;
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typedef struct BVHTreeNearest {
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int index; /* the index of the nearest found (untouched if none is found within a dist radius from the given coordinates) */
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float co[3]; /* nearest coordinates (untouched it none is found within a dist radius from the given coordinates) */
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float no[3]; /* normal at nearest coordinates (untouched it none is found within a dist radius from the given coordinates) */
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float dist_sq; /* squared distance to search around */
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int flags;
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} BVHTreeNearest;
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typedef struct BVHTreeRay {
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float origin[3]; /* ray origin */
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float direction[3]; /* ray direction */
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float radius; /* radius around ray */
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#ifdef USE_KDOPBVH_WATERTIGHT
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struct IsectRayPrecalc *isect_precalc;
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#endif
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} BVHTreeRay;
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typedef struct BVHTreeRayHit {
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int index; /* index of the tree node (untouched if no hit is found) */
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float co[3]; /* coordinates of the hit point */
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float no[3]; /* normal on hit point */
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float dist; /* distance to the hit point */
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} BVHTreeRayHit;
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enum {
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/* calculate IsectRayPrecalc data */
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BVH_RAYCAST_WATERTIGHT = (1 << 0),
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};
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#define BVH_RAYCAST_DEFAULT (BVH_RAYCAST_WATERTIGHT)
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#define BVH_RAYCAST_DIST_MAX (FLT_MAX / 2.0f)
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/* callback must update nearest in case it finds a nearest result */
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typedef void (*BVHTree_NearestPointCallback)(void *userdata, int index, const float co[3], BVHTreeNearest *nearest);
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/* callback must update hit in case it finds a nearest successful hit */
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typedef void (*BVHTree_RayCastCallback)(void *userdata, int index, const BVHTreeRay *ray, BVHTreeRayHit *hit);
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/* callback to check if 2 nodes overlap (use thread if intersection results need to be stored) */
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typedef bool (*BVHTree_OverlapCallback)(void *userdata, int index_a, int index_b, int thread);
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/* callback to range search query */
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typedef void (*BVHTree_RangeQuery)(void *userdata, int index, const float co[3], float dist_sq);
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/* callbacks to BLI_bvhtree_walk_dfs */
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/* return true to traverse into this nodes children, else skip. */
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typedef bool (*BVHTree_WalkParentCallback)(const BVHTreeAxisRange *bounds, void *userdata);
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/* return true to keep walking, else early-exit the search. */
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typedef bool (*BVHTree_WalkLeafCallback)(const BVHTreeAxisRange *bounds, int index, void *userdata);
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/* return true to search (min, max) else (max, min). */
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typedef bool (*BVHTree_WalkOrderCallback)(const BVHTreeAxisRange *bounds, char axis, void *userdata);
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BVHTree *BLI_bvhtree_new(int maxsize, float epsilon, char tree_type, char axis);
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void BLI_bvhtree_free(BVHTree *tree);
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/* construct: first insert points, then call balance */
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void BLI_bvhtree_insert(BVHTree *tree, int index, const float co[3], int numpoints);
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void BLI_bvhtree_balance(BVHTree *tree);
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/* update: first update points/nodes, then call update_tree to refit the bounding volumes */
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bool BLI_bvhtree_update_node(BVHTree *tree, int index, const float co[3], const float co_moving[3], int numpoints);
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void BLI_bvhtree_update_tree(BVHTree *tree);
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int BLI_bvhtree_overlap_thread_num(const BVHTree *tree);
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/* collision/overlap: check two trees if they overlap, alloc's *overlap with length of the int return value */
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BVHTreeOverlap *BLI_bvhtree_overlap(
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const BVHTree *tree1, const BVHTree *tree2, unsigned int *r_overlap_tot,
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BVHTree_OverlapCallback callback, void *userdata);
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int BLI_bvhtree_get_size(const BVHTree *tree);
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float BLI_bvhtree_get_epsilon(const BVHTree *tree);
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/* find nearest node to the given coordinates
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* (if nearest is given it will only search nodes where square distance is smaller than nearest->dist) */
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int BLI_bvhtree_find_nearest(
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BVHTree *tree, const float co[3], BVHTreeNearest *nearest,
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BVHTree_NearestPointCallback callback, void *userdata);
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int BLI_bvhtree_ray_cast_ex(
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BVHTree *tree, const float co[3], const float dir[3], float radius, BVHTreeRayHit *hit,
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BVHTree_RayCastCallback callback, void *userdata,
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int flag);
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int BLI_bvhtree_ray_cast(
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BVHTree *tree, const float co[3], const float dir[3], float radius, BVHTreeRayHit *hit,
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BVHTree_RayCastCallback callback, void *userdata);
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void BLI_bvhtree_ray_cast_all_ex(
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BVHTree *tree, const float co[3], const float dir[3], float radius, float hit_dist,
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BVHTree_RayCastCallback callback, void *userdata,
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int flag);
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void BLI_bvhtree_ray_cast_all(
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BVHTree *tree, const float co[3], const float dir[3], float radius, float hit_dist,
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BVHTree_RayCastCallback callback, void *userdata);
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float BLI_bvhtree_bb_raycast(const float bv[6], const float light_start[3], const float light_end[3], float pos[3]);
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/* range query */
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int BLI_bvhtree_range_query(
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BVHTree *tree, const float co[3], float radius,
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BVHTree_RangeQuery callback, void *userdata);
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void BLI_bvhtree_walk_dfs(
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BVHTree *tree,
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BVHTree_WalkParentCallback walk_parent_cb,
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BVHTree_WalkLeafCallback walk_leaf_cb,
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BVHTree_WalkOrderCallback walk_order_cb,
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void *userdata);
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/* expose for bvh callbacks to use */
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extern const float bvhtree_kdop_axes[13][3];
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#ifdef __cplusplus
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}
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#endif
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#endif /* __BLI_KDOPBVH_H__ */
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