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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) 2009 Blender Foundation.
* All rights reserved.
*
* The Original Code is: all of this file.
*
* Contributor(s): André Pinto.
*
* ***** END GPL LICENSE BLOCK *****
*/
#include "vbvh.h"
#include "svbvh.h"
#include "reorganize.h"
#define DFS_STACK_SIZE 256
struct QBVHTree
{
RayObject rayobj;
SVBVHNode *root;
MemArena *node_arena;
float cost;
RTBuilder *builder;
};
template<>
void bvh_done<QBVHTree>(QBVHTree *obj)
{
rtbuild_done(obj->builder, &obj->rayobj.control);
//TODO find a away to exactly calculate the needed memory
MemArena *arena1 = BLI_memarena_new(BLI_MEMARENA_STD_BUFSIZE);
BLI_memarena_use_malloc(arena1);
MemArena *arena2 = BLI_memarena_new(BLI_MEMARENA_STD_BUFSIZE);
BLI_memarena_use_malloc(arena2);
BLI_memarena_use_align(arena2, 16);
//Build and optimize the tree
//TODO do this in 1 pass (half memory usage during building)
VBVHNode *root = BuildBinaryVBVH<VBVHNode>(arena1, &obj->rayobj.control).transform(obj->builder);
if(RE_rayobjectcontrol_test_break(&obj->rayobj.control))
{
BLI_memarena_free(arena1);
BLI_memarena_free(arena2);
return;
}
pushup_simd<VBVHNode,4>(root);
obj->root = Reorganize_SVBVH<VBVHNode>(arena2).transform(root);
//Cleanup
BLI_memarena_free(arena1);
rtbuild_free( obj->builder );
obj->builder = NULL;
obj->node_arena = arena2;
obj->cost = 1.0;
}
template<int StackSize>
int intersect(QBVHTree *obj, Isect* isec)
{
//TODO renable hint support
if(RE_rayobject_isAligned(obj->root))
return bvh_node_stack_raycast<SVBVHNode,StackSize,false>( obj->root, isec);
else
return RE_rayobject_intersect( (RayObject*) obj->root, isec );
}
template<class Tree>
void bvh_hint_bb(Tree *tree, LCTSHint *hint, float *min, float *max)
{
//TODO renable hint support
{
hint->size = 0;
hint->stack[hint->size++] = (RayObject*)tree->root;
}
}
/* the cast to pointer function is needed to workarround gcc bug: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11407 */
template<class Tree, int STACK_SIZE>
RayObjectAPI make_api()
{
static RayObjectAPI api =
{
(RE_rayobject_raycast_callback) ((int(*)(Tree*,Isect*)) &intersect<STACK_SIZE>),
(RE_rayobject_add_callback) ((void(*)(Tree*,RayObject*)) &bvh_add<Tree>),
(RE_rayobject_done_callback) ((void(*)(Tree*)) &bvh_done<Tree>),
(RE_rayobject_free_callback) ((void(*)(Tree*)) &bvh_free<Tree>),
(RE_rayobject_merge_bb_callback)((void(*)(Tree*,float*,float*)) &bvh_bb<Tree>),
(RE_rayobject_cost_callback) ((float(*)(Tree*)) &bvh_cost<Tree>),
(RE_rayobject_hint_bb_callback) ((void(*)(Tree*,LCTSHint*,float*,float*)) &bvh_hint_bb<Tree>)
};
return api;
}
template<class Tree>
RayObjectAPI* bvh_get_api(int maxstacksize)
{
static RayObjectAPI bvh_api256 = make_api<Tree,1024>();
if(maxstacksize <= 1024) return &bvh_api256;
assert(maxstacksize <= 256);
return 0;
}
RayObject *RE_rayobject_qbvh_create(int size)
{
return bvh_create_tree<QBVHTree,DFS_STACK_SIZE>(size);
}
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