showcase1.cpp File Reference

Generates general showcase image. More...

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

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Functions
template<typename IM , typename T1 , typename T2 >
void	drawIntersect (IM &img, const T1 &t1, const T2 &t2)
int	main (int, const char **)

Variables
DrawParams	color_red

Detailed Description

Generates general showcase image.

Function Documentation

drawIntersect()

template<typename IM , typename T1 , typename T2 >

void drawIntersect	(	IM &	img,
		const T1 &	t1,
		const T2 &	t2
	)

{
    auto intersect = t1.intersects(t2);
    if( intersect() )
        draw( img, intersect.get(), color_red );
}

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main()

int main	(	int	,
		const char **
	)

{
    auto nbim = 30;         // number of images in gif
    auto im_w = 400;
    auto im_h = 280;

    Image<SvgImage> myImg( im_w, im_h );

    Homogr Hr( 2.*M_PI/nbim );    // set up rotation
    Homogr HT1(  im_w/2,  100 );  // centered on image center
    Homogr HT2( -im_w/2, -100 );
    Homogr H = HT1 * Hr * HT2;

// define some primitives
    Circle  cir_fixed( Point2d( 265,195), 40 );
    Circle  cir( Point2d( 32,82), 22 );
    FRect   r_fixed( 40,85,130,155 );
    Segment seg( 85,210, 335, 25 );
    FRect   rect( 0,0,200,80 );
    CPolyline pol{ std::vector<Point2d>{ {30,20}, {140,45}, {110,110}, {20,65} } };

// define some colors
    color_red   = DrawParams().setColor(200,20,20);
    auto color_green = DrawParams().setColor(20,220,20);
    auto color_blue  = DrawParams().setColor(20,20,220);
    auto color_poly  = DrawParams().setColor(180,0,180);

// move rectangle dx=100, dy=60
    pol = Homogr().addTranslation(75, 20) * pol;
    Line2d lih( Point2d(0,100), Point2d(200,100) );
    Line2d liv( Point2d(200,0), Point2d(200,400) );

    Line2d li( Point2d(0,0), Point2d(200,80) );
    for( int i=0; i<nbim; i++ )
    {
        myImg.clear();

        lih.draw( myImg );             // draw all the stuff
        liv.draw( myImg );
        li.draw( myImg, color_green );
        pol.draw( myImg, color_poly );

        if( cir.isInside( cir_fixed ) || cir.isInside( r_fixed ) )
            cir.draw( myImg, DrawParams().setColor(220,0,0) );
        else
            cir.draw( myImg, color_blue );

        r_fixed.draw(   myImg, color_green );
        seg.draw(       myImg, color_green );
        cir_fixed.draw( myImg, color_green );

        drawIntersect( myImg, lih, li );
        drawIntersect( myImg, lih, seg );
        drawIntersect( myImg, liv, li );
        drawIntersect( myImg, liv, seg );

        drawIntersect( myImg, pol, li );
        drawIntersect( myImg, pol, r_fixed );
        drawIntersect( myImg, pol, cir_fixed );
        drawIntersect( myImg, pol, seg );

        drawIntersect( myImg, cir, seg );
        drawIntersect( myImg, cir, r_fixed );
        drawIntersect( myImg, cir, cir_fixed );

        std::ostringstream oss;
        oss << "showcase1_" << std::setfill('0') << std::setw(2) <<i << ".svg";
        myImg.write( oss.str() );

        pol = H * pol;   // rotate lines and polygon
        lih = H * lih;
        liv = H * liv;

        cir.translate( 12, 6 ); // move the circle
    }
}

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Variable Documentation

color_red

DrawParams color_red