godot/thirdparty/embree/kernels/bvh/bvh_statistics.cpp

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// Copyright 2009-2021 Intel Corporation
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// SPDX-License-Identifier: Apache-2.0
#include "bvh_statistics.h"
#include "../../common/algorithms/parallel_reduce.h"
namespace embree
{
template<int N>
BVHNStatistics<N>::BVHNStatistics (BVH* bvh) : bvh(bvh)
{
double A = max(0.0f,bvh->getLinearBounds().expectedHalfArea());
stat = statistics(bvh->root,A,BBox1f(0.0f,1.0f));
}
template<int N>
std::string BVHNStatistics<N>::str()
{
std::ostringstream stream;
stream.setf(std::ios::fixed, std::ios::floatfield);
stream << " primitives = " << bvh->numPrimitives << ", vertices = " << bvh->numVertices << ", depth = " << stat.depth << std::endl;
size_t totalBytes = stat.bytes(bvh);
double totalSAH = stat.sah(bvh);
stream << " total : sah = " << std::setw(7) << std::setprecision(3) << totalSAH << " (100.00%), ";
stream << "#bytes = " << std::setw(7) << std::setprecision(2) << totalBytes/1E6 << " MB (100.00%), ";
stream << "#nodes = " << std::setw(7) << stat.size() << " (" << std::setw(6) << std::setprecision(2) << 100.0*stat.fillRate(bvh) << "% filled), ";
stream << "#bytes/prim = " << std::setw(6) << std::setprecision(2) << double(totalBytes)/double(bvh->numPrimitives) << std::endl;
if (stat.statAABBNodes.numNodes ) stream << " getAABBNodes : " << stat.statAABBNodes.toString(bvh,totalSAH,totalBytes) << std::endl;
if (stat.statOBBNodes.numNodes ) stream << " ungetAABBNodes : " << stat.statOBBNodes.toString(bvh,totalSAH,totalBytes) << std::endl;
if (stat.statAABBNodesMB.numNodes ) stream << " getAABBNodesMB : " << stat.statAABBNodesMB.toString(bvh,totalSAH,totalBytes) << std::endl;
if (stat.statAABBNodesMB4D.numNodes) stream << " getAABBNodesMB4D : " << stat.statAABBNodesMB4D.toString(bvh,totalSAH,totalBytes) << std::endl;
if (stat.statOBBNodesMB.numNodes) stream << " ungetAABBNodesMB : " << stat.statOBBNodesMB.toString(bvh,totalSAH,totalBytes) << std::endl;
if (stat.statQuantizedNodes.numNodes ) stream << " quantizedNodes : " << stat.statQuantizedNodes.toString(bvh,totalSAH,totalBytes) << std::endl;
if (true) stream << " leaves : " << stat.statLeaf.toString(bvh,totalSAH,totalBytes) << std::endl;
if (true) stream << " histogram : " << stat.statLeaf.histToString() << std::endl;
return stream.str();
}
template<int N>
typename BVHNStatistics<N>::Statistics BVHNStatistics<N>::statistics(NodeRef node, const double A, const BBox1f t0t1)
{
Statistics s;
assert(t0t1.size() > 0.0f);
double dt = max(0.0f,t0t1.size());
if (node.isAABBNode())
{
AABBNode* n = node.getAABBNode();
s = s + parallel_reduce(0,N,Statistics(),[&] ( const int i ) {
if (n->child(i) == BVH::emptyNode) return Statistics();
const double Ai = max(0.0f,halfArea(n->extend(i)));
Statistics s = statistics(n->child(i),Ai,t0t1);
s.statAABBNodes.numChildren++;
return s;
}, Statistics::add);
s.statAABBNodes.numNodes++;
s.statAABBNodes.nodeSAH += dt*A;
s.depth++;
}
else if (node.isOBBNode())
{
OBBNode* n = node.ungetAABBNode();
s = s + parallel_reduce(0,N,Statistics(),[&] ( const int i ) {
if (n->child(i) == BVH::emptyNode) return Statistics();
const double Ai = max(0.0f,halfArea(n->extent(i)));
Statistics s = statistics(n->child(i),Ai,t0t1);
s.statOBBNodes.numChildren++;
return s;
}, Statistics::add);
s.statOBBNodes.numNodes++;
s.statOBBNodes.nodeSAH += dt*A;
s.depth++;
}
else if (node.isAABBNodeMB())
{
AABBNodeMB* n = node.getAABBNodeMB();
s = s + parallel_reduce(0,N,Statistics(),[&] ( const int i ) {
if (n->child(i) == BVH::emptyNode) return Statistics();
const double Ai = max(0.0f,n->expectedHalfArea(i,t0t1));
Statistics s = statistics(n->child(i),Ai,t0t1);
s.statAABBNodesMB.numChildren++;
return s;
}, Statistics::add);
s.statAABBNodesMB.numNodes++;
s.statAABBNodesMB.nodeSAH += dt*A;
s.depth++;
}
else if (node.isAABBNodeMB4D())
{
AABBNodeMB4D* n = node.getAABBNodeMB4D();
s = s + parallel_reduce(0,N,Statistics(),[&] ( const int i ) {
if (n->child(i) == BVH::emptyNode) return Statistics();
const BBox1f t0t1i = intersect(t0t1,n->timeRange(i));
assert(!t0t1i.empty());
const double Ai = n->AABBNodeMB::expectedHalfArea(i,t0t1i);
Statistics s = statistics(n->child(i),Ai,t0t1i);
s.statAABBNodesMB4D.numChildren++;
return s;
}, Statistics::add);
s.statAABBNodesMB4D.numNodes++;
s.statAABBNodesMB4D.nodeSAH += dt*A;
s.depth++;
}
else if (node.isOBBNodeMB())
{
OBBNodeMB* n = node.ungetAABBNodeMB();
s = s + parallel_reduce(0,N,Statistics(),[&] ( const int i ) {
if (n->child(i) == BVH::emptyNode) return Statistics();
const double Ai = max(0.0f,halfArea(n->extent0(i)));
Statistics s = statistics(n->child(i),Ai,t0t1);
s.statOBBNodesMB.numChildren++;
return s;
}, Statistics::add);
s.statOBBNodesMB.numNodes++;
s.statOBBNodesMB.nodeSAH += dt*A;
s.depth++;
}
else if (node.isQuantizedNode())
{
QuantizedNode* n = node.quantizedNode();
s = s + parallel_reduce(0,N,Statistics(),[&] ( const int i ) {
if (n->child(i) == BVH::emptyNode) return Statistics();
const double Ai = max(0.0f,halfArea(n->extent(i)));
Statistics s = statistics(n->child(i),Ai,t0t1);
s.statQuantizedNodes.numChildren++;
return s;
}, Statistics::add);
s.statQuantizedNodes.numNodes++;
s.statQuantizedNodes.nodeSAH += dt*A;
s.depth++;
}
else if (node.isLeaf())
{
size_t num; const char* tri = node.leaf(num);
if (num)
{
for (size_t i=0; i<num; i++)
{
const size_t bytes = bvh->primTy->getBytes(tri);
s.statLeaf.numPrimsActive += bvh->primTy->sizeActive(tri);
s.statLeaf.numPrimsTotal += bvh->primTy->sizeTotal(tri);
s.statLeaf.numBytes += bytes;
tri+=bytes;
}
s.statLeaf.numLeaves++;
s.statLeaf.numPrimBlocks += num;
s.statLeaf.leafSAH += dt*A*num;
if (num-1 < Statistics::LeafStat::NHIST) {
s.statLeaf.numPrimBlocksHistogram[num-1]++;
}
}
}
else {
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// -- GODOT start --
// throw std::runtime_error("not supported node type in bvh_statistics");
abort();
// -- GODOT end --
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}
return s;
}
#if defined(__AVX__)
template class BVHNStatistics<8>;
#endif
#if !defined(__AVX__) || (!defined(EMBREE_TARGET_SSE2) && !defined(EMBREE_TARGET_SSE42)) || defined(__aarch64__)
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template class BVHNStatistics<4>;
#endif
}