120 lines
2.6 KiB
C++
120 lines
2.6 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.
|
|
*/
|
|
|
|
#include "bvh.h"
|
|
#include "bvh_build.h"
|
|
#include "bvh_node.h"
|
|
|
|
#include "util_debug.h"
|
|
#include "util_vector.h"
|
|
|
|
CCL_NAMESPACE_BEGIN
|
|
|
|
/* BVH Node */
|
|
|
|
int BVHNode::getSubtreeSize(BVH_STAT stat) const
|
|
{
|
|
int cnt = 0;
|
|
|
|
switch(stat)
|
|
{
|
|
case BVH_STAT_NODE_COUNT:
|
|
cnt = 1;
|
|
break;
|
|
case BVH_STAT_LEAF_COUNT:
|
|
cnt = is_leaf() ? 1 : 0;
|
|
break;
|
|
case BVH_STAT_INNER_COUNT:
|
|
cnt = is_leaf() ? 0 : 1;
|
|
break;
|
|
case BVH_STAT_TRIANGLE_COUNT:
|
|
cnt = is_leaf() ? reinterpret_cast<const LeafNode*>(this)->num_triangles() : 0;
|
|
break;
|
|
case BVH_STAT_CHILDNODE_COUNT:
|
|
cnt = num_children();
|
|
break;
|
|
default:
|
|
assert(0); /* unknown mode */
|
|
}
|
|
|
|
if(!is_leaf())
|
|
for(int i = 0; i < num_children(); i++)
|
|
cnt += get_child(i)->getSubtreeSize(stat);
|
|
|
|
return cnt;
|
|
}
|
|
|
|
void BVHNode::deleteSubtree()
|
|
{
|
|
for(int i = 0; i < num_children(); i++)
|
|
if(get_child(i))
|
|
get_child(i)->deleteSubtree();
|
|
|
|
delete this;
|
|
}
|
|
|
|
float BVHNode::computeSubtreeSAHCost(const BVHParams& p, float probability) const
|
|
{
|
|
float SAH = probability * p.cost(num_children(), num_triangles());
|
|
|
|
for(int i = 0; i < num_children(); i++) {
|
|
BVHNode *child = get_child(i);
|
|
SAH += child->computeSubtreeSAHCost(p, probability * child->m_bounds.safe_area()/m_bounds.safe_area());
|
|
}
|
|
|
|
return SAH;
|
|
}
|
|
|
|
uint BVHNode::update_visibility()
|
|
{
|
|
if(!is_leaf() && m_visibility == 0) {
|
|
InnerNode *inner = (InnerNode*)this;
|
|
BVHNode *child0 = inner->children[0];
|
|
BVHNode *child1 = inner->children[1];
|
|
|
|
m_visibility = child0->update_visibility()|child1->update_visibility();
|
|
}
|
|
|
|
return m_visibility;
|
|
}
|
|
|
|
/* Inner Node */
|
|
|
|
void InnerNode::print(int depth) const
|
|
{
|
|
for(int i = 0; i < depth; i++)
|
|
printf(" ");
|
|
|
|
printf("inner node %p\n", (void*)this);
|
|
|
|
if(children[0])
|
|
children[0]->print(depth+1);
|
|
if(children[1])
|
|
children[1]->print(depth+1);
|
|
}
|
|
|
|
void LeafNode::print(int depth) const
|
|
{
|
|
for(int i = 0; i < depth; i++)
|
|
printf(" ");
|
|
|
|
printf("leaf node %d to %d\n", m_lo, m_hi);
|
|
}
|
|
|
|
CCL_NAMESPACE_END
|
|
|