showcase7c.cpp File Reference

shows Segment isInside() FRect , Circle, CPolyline More...

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

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Functions
template<typename T >
void	draw_intersect (const Segment &seg, const T &p)
int	main (int, const char **)

Variables
img::Image< img::SvgImage >	im (380, 160)

Detailed Description

shows Segment isInside() FRect , Circle, CPolyline

Function Documentation

draw_intersect()

template<typename T >

void draw_intersect	(	const Segment &	seg,
		const T &	p
	)

{
    auto inter =  seg.intersects(p);
    if( inter() )
        for( const auto& pt: inter.get() )
            pt.draw( im, img::DrawParams().setPointStyle( img::PtStyle::Dot ) );
}

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main()

int main	(	int	,
		const char **
	)

{
    auto n = 35; // nb images
    FRect rect(35,30,110,90);
    Circle cir( 160,60, 30 );

    std::vector<Point2d> vpts{
        { 0, 0 },
        { 140,30 },
        { 80,110},
        { 60,50 },
        { 20,80 }
    };
    CPolyline pol( vpts );
    pol.translate( 220, 20 );

    auto col = img::DrawParams().setColor(50,250,20);
    auto col_outside = img::DrawParams().setColor(50,20,200);
    auto col_inside  = img::DrawParams().setColor(200,20,20).setThickness(2);

    Point2d pt1( 20,55 );
    Point2d pt2( 32,38 );
    for( int i=0; i<n; i++ )
    {
        im.clear();
        Segment seg(pt1,pt2);

        auto cols = col_outside;
        if( seg.isInside( rect ) || seg.isInside( cir )  || seg.isInside( pol ) )
            cols = col_inside;

        rect.draw( im, col );
        cir.draw(  im, col );
        pol.draw(  im, col );
        seg.draw(  im, cols );

        draw_intersect( seg, rect );
        draw_intersect( seg, cir );
        draw_intersect( seg, pol );

        translate( pt1, 10, 0);
        translate( pt2, 8, 2) ;
        std::ostringstream oss;
        oss << "showcase7c_" << std::setfill('0') << std::setw(2) <<i << ".svg";
        im.write( oss.str() );
    }
}

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Variable Documentation

im

img::Image<img::SvgImage> im(380, 160)