forked from bartvdbraak/blender
87 lines
1.8 KiB
C
87 lines
1.8 KiB
C
|
/*
|
||
|
|
* Adapted from code copyright 2009-2010 NVIDIA Corporation
|
||
|
|
* Modifications Copyright 2011, Blender Foundation.
|
||
|
|
*
|
||
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
* you may not use this file except in compliance with the License.
|
||
|
|
* You may obtain a copy of the License at
|
||
|
|
*
|
||
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
*
|
||
|
|
* Unless required by applicable law or agreed to in writing, software
|
||
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
* See the License for the specific language governing permissions and
|
||
|
|
* limitations under the License.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef __BVH_PARAMS_H__
|
||
|
|
#define __BVH_PARAMS_H__
|
||
|
|
|
||
|
|
CCL_NAMESPACE_BEGIN
|
||
|
|
|
||
|
|
/* BVH Parameters */
|
||
|
|
|
||
|
|
class BVHParams
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
/* spatial split area threshold */
|
||
|
|
bool use_spatial_split;
|
||
|
|
float spatial_split_alpha;
|
||
|
|
|
||
|
|
/* SAH costs */
|
||
|
|
float sah_node_cost;
|
||
|
|
float sah_triangle_cost;
|
||
|
|
|
||
|
|
/* number of triangles in leaf */
|
||
|
|
int min_leaf_size;
|
||
|
|
int max_leaf_size;
|
||
|
|
|
||
|
|
/* object or mesh level bvh */
|
||
|
|
bool top_level;
|
||
|
|
|
||
|
|
/* disk cache */
|
||
|
|
bool use_cache;
|
||
|
|
|
||
|
|
/* QBVH */
|
||
|
|
bool use_qbvh;
|
||
|
|
|
||
|
|
/* fixed parameters */
|
||
|
|
enum {
|
||
|
|
MAX_DEPTH = 64,
|
||
|
|
MAX_SPATIAL_DEPTH = 48,
|
||
|
|
NUM_SPATIAL_BINS = 32
|
||
|
|
};
|
||
|
|
|
||
|
|
BVHParams()
|
||
|
|
{
|
||
|
|
use_spatial_split = true;
|
||
|
|
spatial_split_alpha = 1e-5f;
|
||
|
|
|
||
|
|
sah_node_cost = 1.0f;
|
||
|
|
sah_triangle_cost = 1.0f;
|
||
|
|
|
||
|
|
min_leaf_size = 1;
|
||
|
|
max_leaf_size = 0x7FFFFFF;
|
||
|
|
|
||
|
|
top_level = false;
|
||
|
|
use_cache = false;
|
||
|
|
use_qbvh = false;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* SAH costs */
|
||
|
|
float cost(int num_nodes, int num_tris) const
|
||
|
|
{ return node_cost(num_nodes) + triangle_cost(num_tris); }
|
||
|
|
|
||
|
|
float triangle_cost(int n) const
|
||
|
|
{ return n*sah_triangle_cost; }
|
||
|
|
|
||
|
|
float node_cost(int n) const
|
||
|
|
{ return n*sah_node_cost; }
|
||
|
|
};
|
||
|
|
|
||
|
|
CCL_NAMESPACE_END
|
||
|
|
|
||
|
|
#endif /* __BVH_PARAMS_H__ */
|
||
|
|
|