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// Copyright 2009-2021 Intel Corporation
// SPDX-License-Identifier: Apache-2.0
#pragma once
#include "bvh.h"
#include <sstream>
namespace embree
{
template<int N>
class BVHNStatistics
{
typedef BVHN<N> BVH;
typedef typename BVH::AABBNode AABBNode;
typedef typename BVH::OBBNode OBBNode;
typedef typename BVH::AABBNodeMB AABBNodeMB;
typedef typename BVH::AABBNodeMB4D AABBNodeMB4D;
typedef typename BVH::OBBNodeMB OBBNodeMB;
typedef typename BVH::QuantizedNode QuantizedNode;
typedef typename BVH::NodeRef NodeRef;
struct Statistics
{
template<typename Node>
struct NodeStat
{
NodeStat ( double nodeSAH = 0,
size_t numNodes = 0,
size_t numChildren = 0)
: nodeSAH(nodeSAH),
numNodes(numNodes),
numChildren(numChildren) {}
double sah(BVH* bvh) const {
return nodeSAH/bvh->getLinearBounds().expectedHalfArea();
}
size_t bytes() const {
return numNodes*sizeof(Node);
}
size_t size() const {
return numNodes;
}
double fillRateNom () const { return double(numChildren); }
double fillRateDen () const { return double(numNodes*N); }
double fillRate () const { return fillRateNom()/fillRateDen(); }
__forceinline friend NodeStat operator+ ( const NodeStat& a, const NodeStat& b)
{
return NodeStat(a.nodeSAH + b.nodeSAH,
a.numNodes+b.numNodes,
a.numChildren+b.numChildren);
}
std::string toString(BVH* bvh, double sahTotal, size_t bytesTotal) const
{
std::ostringstream stream;
stream.setf(std::ios::fixed, std::ios::floatfield);
stream << "sah = " << std::setw(7) << std::setprecision(3) << sah(bvh);
stream << " (" << std::setw(6) << std::setprecision(2) << 100.0*sah(bvh)/sahTotal << "%), ";
stream << "#bytes = " << std::setw(7) << std::setprecision(2) << bytes()/1E6 << " MB ";
stream << "(" << std::setw(6) << std::setprecision(2) << 100.0*double(bytes())/double(bytesTotal) << "%), ";
stream << "#nodes = " << std::setw(7) << numNodes << " (" << std::setw(6) << std::setprecision(2) << 100.0*fillRate() << "% filled), ";
stream << "#bytes/prim = " << std::setw(6) << std::setprecision(2) << double(bytes())/double(bvh->numPrimitives);
return stream.str();
}
public:
double nodeSAH;
size_t numNodes;
size_t numChildren;
};
struct LeafStat
{
static const int NHIST = 8;
LeafStat ( double leafSAH = 0.0f,
size_t numLeaves = 0,
size_t numPrimsActive = 0,
size_t numPrimsTotal = 0,
size_t numPrimBlocks = 0,
size_t numBytes = 0)
: leafSAH(leafSAH),
numLeaves(numLeaves),
numPrimsActive(numPrimsActive),
numPrimsTotal(numPrimsTotal),
numPrimBlocks(numPrimBlocks),
numBytes(numBytes)
{
for (size_t i=0; i<NHIST; i++)
numPrimBlocksHistogram[i] = 0;
}
double sah(BVH* bvh) const {
return leafSAH/bvh->getLinearBounds().expectedHalfArea();
}
size_t bytes(BVH* bvh) const {
return numBytes;
}
size_t size() const {
return numLeaves;
}
double fillRateNom (BVH* bvh) const { return double(numPrimsActive); }
double fillRateDen (BVH* bvh) const { return double(numPrimsTotal); }
double fillRate (BVH* bvh) const { return fillRateNom(bvh)/fillRateDen(bvh); }
__forceinline friend LeafStat operator+ ( const LeafStat& a, const LeafStat& b)
{
LeafStat stat(a.leafSAH + b.leafSAH,
a.numLeaves+b.numLeaves,
a.numPrimsActive+b.numPrimsActive,
a.numPrimsTotal+b.numPrimsTotal,
a.numPrimBlocks+b.numPrimBlocks,
a.numBytes+b.numBytes);
for (size_t i=0; i<NHIST; i++) {
stat.numPrimBlocksHistogram[i] += a.numPrimBlocksHistogram[i];
stat.numPrimBlocksHistogram[i] += b.numPrimBlocksHistogram[i];
}
return stat;
}
std::string toString(BVH* bvh, double sahTotal, size_t bytesTotal) const
{
std::ostringstream stream;
stream.setf(std::ios::fixed, std::ios::floatfield);
stream << "sah = " << std::setw(7) << std::setprecision(3) << sah(bvh);
stream << " (" << std::setw(6) << std::setprecision(2) << 100.0*sah(bvh)/sahTotal << "%), ";
stream << "#bytes = " << std::setw(7) << std::setprecision(2) << double(bytes(bvh))/1E6 << " MB ";
stream << "(" << std::setw(6) << std::setprecision(2) << 100.0*double(bytes(bvh))/double(bytesTotal) << "%), ";
stream << "#nodes = " << std::setw(7) << numLeaves << " (" << std::setw(6) << std::setprecision(2) << 100.0*fillRate(bvh) << "% filled), ";
stream << "#bytes/prim = " << std::setw(6) << std::setprecision(2) << double(bytes(bvh))/double(bvh->numPrimitives);
return stream.str();
}
std::string histToString() const
{
std::ostringstream stream;
stream.setf(std::ios::fixed, std::ios::floatfield);
for (size_t i=0; i<NHIST; i++)
stream << std::setw(6) << std::setprecision(2) << 100.0f*float(numPrimBlocksHistogram[i])/float(numLeaves) << "% ";
return stream.str();
}
public:
double leafSAH; //!< SAH of the leaves only
size_t numLeaves; //!< Number of leaf nodes.
size_t numPrimsActive; //!< Number of active primitives (
size_t numPrimsTotal; //!< Number of active and inactive primitives
size_t numPrimBlocks; //!< Number of primitive blocks.
size_t numBytes; //!< Number of bytes of leaves.
size_t numPrimBlocksHistogram[8];
};
public:
Statistics (size_t depth = 0,
LeafStat statLeaf = LeafStat(),
NodeStat<AABBNode> statAABBNodes = NodeStat<AABBNode>(),
NodeStat<OBBNode> statOBBNodes = NodeStat<OBBNode>(),
NodeStat<AABBNodeMB> statAABBNodesMB = NodeStat<AABBNodeMB>(),
NodeStat<AABBNodeMB4D> statAABBNodesMB4D = NodeStat<AABBNodeMB4D>(),
NodeStat<OBBNodeMB> statOBBNodesMB = NodeStat<OBBNodeMB>(),
NodeStat<QuantizedNode> statQuantizedNodes = NodeStat<QuantizedNode>())
: depth(depth),
statLeaf(statLeaf),
statAABBNodes(statAABBNodes),
statOBBNodes(statOBBNodes),
statAABBNodesMB(statAABBNodesMB),
statAABBNodesMB4D(statAABBNodesMB4D),
statOBBNodesMB(statOBBNodesMB),
statQuantizedNodes(statQuantizedNodes) {}
double sah(BVH* bvh) const
{
return statLeaf.sah(bvh) +
statAABBNodes.sah(bvh) +
statOBBNodes.sah(bvh) +
statAABBNodesMB.sah(bvh) +
statAABBNodesMB4D.sah(bvh) +
statOBBNodesMB.sah(bvh) +
statQuantizedNodes.sah(bvh);
}
size_t bytes(BVH* bvh) const {
return statLeaf.bytes(bvh) +
statAABBNodes.bytes() +
statOBBNodes.bytes() +
statAABBNodesMB.bytes() +
statAABBNodesMB4D.bytes() +
statOBBNodesMB.bytes() +
statQuantizedNodes.bytes();
}
size_t size() const
{
return statLeaf.size() +
statAABBNodes.size() +
statOBBNodes.size() +
statAABBNodesMB.size() +
statAABBNodesMB4D.size() +
statOBBNodesMB.size() +
statQuantizedNodes.size();
}
double fillRate (BVH* bvh) const
{
double nom = statLeaf.fillRateNom(bvh) +
statAABBNodes.fillRateNom() +
statOBBNodes.fillRateNom() +
statAABBNodesMB.fillRateNom() +
statAABBNodesMB4D.fillRateNom() +
statOBBNodesMB.fillRateNom() +
statQuantizedNodes.fillRateNom();
double den = statLeaf.fillRateDen(bvh) +
statAABBNodes.fillRateDen() +
statOBBNodes.fillRateDen() +
statAABBNodesMB.fillRateDen() +
statAABBNodesMB4D.fillRateDen() +
statOBBNodesMB.fillRateDen() +
statQuantizedNodes.fillRateDen();
return nom/den;
}
friend Statistics operator+ ( const Statistics& a, const Statistics& b )
{
return Statistics(max(a.depth,b.depth),
a.statLeaf + b.statLeaf,
a.statAABBNodes + b.statAABBNodes,
a.statOBBNodes + b.statOBBNodes,
a.statAABBNodesMB + b.statAABBNodesMB,
a.statAABBNodesMB4D + b.statAABBNodesMB4D,
a.statOBBNodesMB + b.statOBBNodesMB,
a.statQuantizedNodes + b.statQuantizedNodes);
}
static Statistics add ( const Statistics& a, const Statistics& b ) {
return a+b;
}
public:
size_t depth;
LeafStat statLeaf;
NodeStat<AABBNode> statAABBNodes;
NodeStat<OBBNode> statOBBNodes;
NodeStat<AABBNodeMB> statAABBNodesMB;
NodeStat<AABBNodeMB4D> statAABBNodesMB4D;
NodeStat<OBBNodeMB> statOBBNodesMB;
NodeStat<QuantizedNode> statQuantizedNodes;
};
public:
/* Constructor gathers statistics. */
BVHNStatistics (BVH* bvh);
/*! Convert statistics into a string */
std::string str();
double sah() const {
return stat.sah(bvh);
}
size_t bytesUsed() const {
return stat.bytes(bvh);
}
private:
Statistics statistics(NodeRef node, const double A, const BBox1f dt);
private:
BVH* bvh;
Statistics stat;
};
typedef BVHNStatistics<4> BVH4Statistics;
typedef BVHNStatistics<8> BVH8Statistics;
}
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