showcase14.cpp File Reference

Generates moving polygons and shows their intersection points. More...

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

Include dependency graph for showcase14.cpp:

Functions
int	main (int, const char **)

Detailed Description

Generates moving polygons and shows their intersection points.

Function Documentation

main()

int main	(	int	,
		const char **
	)

{
    auto nbim = 20; // nb images

    std::vector<Point2d> vpts1{
        { 0, 0 },
        { 140,30 },
        { 80,110},
        { 60,50 },
        { 20,80 }
    };
    std::vector<Point2d> vpts2{
        { 0, 0 },
        { 65, -30 },
        { 78, -10 },
        { 120,-20 },
        { 140,30 },
        { 80,110},
        { 60,50 },
        { 20,80 }
    };

    CPolyline poly1( vpts1 );
    CPolyline poly2( vpts2 );
    poly2.translate(120,80);
    poly1.translate(20,30);
    poly2.rotate( Rotate::CCW, Point2d(150, 150) );

    auto extr_col = img::DrawParams().setColor(100,250,0).setPointStyle( img::PtStyle::Dot );
    for( int i=0; i<nbim; i++ )
    {
        img::Image<img::SvgImage> im( 360, 280 );
//      poly1.draw( im, img::DrawParams().setColor(250,128,0) );
//      poly2.draw( im, img::DrawParams().setColor(250,0,128) );
        im.draw( poly1, img::DrawParams().setColor(250,128,0) );
        im.draw( poly2, img::DrawParams().setColor(250,0,128) );

        auto res = poly1.intersects(poly2);  // intersection points
        auto ptInt = res.get();
        for( const auto& pt: ptInt )
            pt.draw( im, img::DrawParams().setColor(0,250,0).setPointStyle( img::PtStyle::Dot ) );

        auto closest = getClosestPoints( poly1, poly2 );
        auto ppts = closest.getPoints();
        draw( im, ppts );
        Segment( closest.getPoints() ).draw( im, img::DrawParams().setColor(0,0,250) );
        getBB( poly1, poly2 ).draw( im, img::DrawParams().setColor(220,200,220) );
        im.drawText( "MinDist=" + std::to_string( closest.getMinDist() ), Point2d(20,20) );

        poly1.translate( 10, 7 );
        poly2.translate( -7, -7 );

        auto c2 = poly2.centroid();
        poly2 = Homogr().addTranslation( -c2.getX(), -c2.getY() ).addRotation(10.*M_PI/180.).addTranslation( c2.getX(), c2.getY() ) * poly2;

        std::ostringstream oss;
        oss << "showcase14_" << std::setfill('0') << std::setw(2) << i << ".svg";
        im.write( oss.str() );
    }
}

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