ellipse_speed_test.cpp File Reference

test app dedicated to measure speed improvements when using HOMOG2D_OPTIMIZE_SPEED More...

#include "../homog2d.hpp"

Include dependency graph for ellipse_speed_test.cpp:

Functions
int	main (int argc, const char **argv)

Detailed Description

test app dedicated to measure speed improvements when using HOMOG2D_OPTIMIZE_SPEED

Build and run with $ make speed-test

Function Documentation

main()

int main	(	int	argc,
		const char **	argv
	)

{
    size_t c1 = 0;
    size_t c2 = 0;
    size_t c3 = 0;
    double range_center = 1000;
    double esize = 500;

    size_t nb_runs = 1E7;
    if( argc > 1 )
        nb_runs = std::atoi( argv[1] );

    std::srand( std::time(nullptr) );
    Point2d dummy_pt( range_center * std::rand() / RAND_MAX, range_center * std::rand() / RAND_MAX );

    std::cout << "-Running with n=" << nb_runs
    << "\n-HOMOG2D_OPTIMIZE_SPEED: "
#ifdef HOMOG2D_OPTIMIZE_SPEED
        << "YES"
#else
        << "NO"
#endif
    << "\n-HOMOG2D_NOCHECKS: "
#ifdef HOMOG2D_NOCHECKS
        << "YES"
#else
        << "NO"
#endif
        << "\n Ellipse memory footprint=" << sizeof( Ellipse ) << '\n';

    for( size_t i=0; i<nb_runs; i++ )
    {
        auto x0 = range_center * std::rand() / RAND_MAX;
        auto y0 = range_center * std::rand() / RAND_MAX;
        auto a = esize * std::rand() / RAND_MAX + 1.;
        auto b = esize * std::rand() / RAND_MAX + 1.;
        auto angle = 2.0 * M_PI * std::rand() / RAND_MAX;
        Ellipse ell( x0, y0, a, b, angle );
//      std::cout << ell;
        if( dummy_pt.isInside( ell ) )
            c1++;
        auto bb = ell.getOBB();
        c2 += bb.size();
//      if( dummy_pt.isInside(bb) )
//          c2++;
        auto center = ell.getCenter();
        if( dummy_pt.distTo(center) < range_center )
            c3++;

    }
    std::cout << "Result: c1=" << c1 << " c2=" << c2 << " c3=" << c3 << '\n';
}

Here is the call graph for this function: