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add a bench to compare various transformation methods

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Gael Guennebaud 2010-09-07 18:21:36 +02:00
parent 9bb75937cc
commit d591b0466d
1 changed files with 121 additions and 0 deletions
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bench/geometry.cpp Normal file
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#include <iostream>
#include <Eigen/Geometry>
#include <bench/BenchTimer.h>
using namespace std;
using namespace Eigen;
#ifndef SCALAR
#define SCALAR float
#endif
typedef SCALAR Scalar;
typedef NumTraits<Scalar>::Real RealScalar;
typedef Matrix<RealScalar,Dynamic,Dynamic> A;
typedef Matrix</*Real*/Scalar,Dynamic,Dynamic> B;
typedef Matrix<Scalar,Dynamic,Dynamic> C;
typedef Matrix<RealScalar,Dynamic,Dynamic> M;
template<typename Transformation, typename Data>
EIGEN_DONT_INLINE void transform(const Transformation& t, Data& data)
{
EIGEN_ASM_COMMENT("begin");
data = t * data;
EIGEN_ASM_COMMENT("end");
}
template<typename Scalar, typename Data>
EIGEN_DONT_INLINE void transform(const Quaternion<Scalar>& t, Data& data)
{
EIGEN_ASM_COMMENT("begin quat");
for(int i=0;i<data.cols();++i)
data.col(i) = t * data.col(i);
EIGEN_ASM_COMMENT("end quat");
}
template<typename T> struct ToRotationMatrixWrapper
{
enum {Dim = T::Dim};
typedef typename T::Scalar Scalar;
ToRotationMatrixWrapper(const T& o) : object(o) {}
T object;
};
template<typename QType, typename Data>
EIGEN_DONT_INLINE void transform(const ToRotationMatrixWrapper<QType>& t, Data& data)
{
EIGEN_ASM_COMMENT("begin quat via mat");
data = t.object.toRotationMatrix() * data;
EIGEN_ASM_COMMENT("end quat via mat");
}
template<typename Scalar, int Dim, typename Data>
EIGEN_DONT_INLINE void transform(const Transform<Scalar,Dim,Projective>& t, Data& data)
{
data = (t * data.colwise().homogeneous()).template block<Dim,Data::ColsAtCompileTime>(0,0);
}
template<typename T> struct get_dim { enum { Dim = T::Dim }; };
template<typename S, int R, int C, int O, int MR, int MC>
struct get_dim<Matrix<S,R,C,O,MR,MC> > { enum { Dim = R }; };
template<typename Transformation, int N>
struct bench_impl
{
static EIGEN_DONT_INLINE void run(const Transformation& t)
{
Matrix<typename Transformation::Scalar,get_dim<Transformation>::Dim,N> data;
data.setRandom();
bench_impl<Transformation,N-1>::run(t);
BenchTimer timer;
BENCH(timer,4,100000,transform(t,data));
cout.width(9);
cout << timer.best() << " ";
}
};
template<typename Transformation>
struct bench_impl<Transformation,0>
{
static EIGEN_DONT_INLINE void run(const Transformation&) {}
};
template<typename Transformation>
EIGEN_DONT_INLINE void bench(const std::string& msg, const Transformation& t)
{
cout << msg << " ";
bench_impl<Transformation,8>::run(t);
std::cout << "\n";
}
int main(int argc, char ** argv)
{
Matrix<Scalar,3,4> mat34; mat34.setRandom();
Transform<Scalar,3,Isometry> iso3(mat34);
Transform<Scalar,3,Affine> aff3(mat34);
Transform<Scalar,3,AffineCompact> caff3(mat34);
Transform<Scalar,3,Projective> proj3(mat34);
Quaternion<Scalar> quat;
ToRotationMatrixWrapper<Quaternion<Scalar> > quatmat(quat);
Matrix<Scalar,3,3> mat33; mat33.setRandom();
cout.precision(4);
std::cout
<< "N ";
for(int i=0;i<8;++i)
{
cout.width(9);
cout << i+1 << " ";
}
cout << "\n";
bench("matrix 3x3", mat33);
bench("quaternion", quat);
bench("quat-mat ", quatmat);
bench("isometry3 ", iso3);
bench("affine3 ", aff3);
bench("c affine3 ", caff3);
bench("proj3 ", proj3);
}