showcase4a.cpp File Reference

Generates two moving objects and the common bounding box. More...

#include "../../homog2d.hpp"

Include dependency graph for showcase4a.cpp:

Functions
int	main (int, const char **)

Detailed Description

Generates two moving objects and the common bounding box.

Function Documentation

main()

int main	(	int	,
		const char **
	)

{
    auto nbim = 25; // nb images
    auto Hdraw = Homogr().setScale(30).addTranslation(10,10);

    auto r_w0 = 2;
    auto r_h0 = 1;
    auto x0 = 3.;
//  auto y0 = 1.;
    auto k=1.8;
    uint8_t g = 100;
    for( int i=0; i<nbim; i++ )
    {
        auto angle = i * 2. * M_PI / nbim;
        auto x1 = std::cos(angle)*k;
        auto y1 = std::sin(angle)*k;
        auto r_w = r_w0 + std::sin(angle);

        FRect obj1( Point2d( x1+x0, y1+x0), r_w, r_h0 );
        Circle obj2( Point2d(-x1+x0,-y1+x0), 2.-.5*r_w );
        auto bcir = obj1.getBoundingCircle();
        auto cbb = getBB(obj2);

        auto obj1_d = Hdraw * obj1;
        auto obj2_d = Hdraw * obj2;
        auto bcir_d = Hdraw * bcir;
        auto cbb_d  = Hdraw * cbb;

        Image<img::SvgImage> ima( 250, 200 );

        obj1_d.draw( ima, DrawParams().setColor(250,0,0) );
        obj2_d.draw( ima, DrawParams().setColor(0,0,250) );
        bcir_d.draw( ima, DrawParams().setColor(100,250,100)  );
        obj2_d.getBB().draw( ima, DrawParams().setColor(100,50,200)  );

        auto bb = getBB(obj1_d, obj2_d);
        bb.draw( ima, DrawParams().setColor(g,g,g) );
        bb.getBoundingCircle().draw( ima, DrawParams().setColor(50,50,125)  );

        std::ostringstream ossa;
        ossa << "showcase4a_" << std::setfill('0') << std::setw(2) <<i << ".svg";
        ima.write( ossa.str() );
    }
}

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