showcase19.cpp File Reference

Generates random segments. More...

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

Include dependency graph for showcase19.cpp:

Functions
std::vector< Segment >	generateSegments (int nbSegs)
int	main (int, const char **)

Variables
auto	im_h = 300
auto	im_w = 400

Detailed Description

Generates random segments.

Todo:

20240421 switch all showcases to Svg images, much nicer!

Function Documentation

generateSegments()

std::vector<Segment> generateSegments

(

int

nbSegs

)

{
    int delta  = 40;
    int width  = im_w-delta;
    int height = im_h-delta;

    std::vector<Segment> vseg;
    for( auto i=0; i<nbSegs; i++ )
    {
        auto len = 1.0*rand() / RAND_MAX * 40 + 10;
        auto p1x = 1.0*rand() / RAND_MAX * width + 20;
        auto p2x = 1.0*rand() / RAND_MAX * width + 20;;
        auto p1y = 1.0*rand() / RAND_MAX * height + 20;
        auto p2y = 1.0*rand() / RAND_MAX * height + 20;
        auto line = Line2d( p1x, p1y, p2x, p2y );
        auto ppts = line.getPoints( Point2d( p1x, p1y) , len );
        vseg.push_back( Segment( ppts ) );
    }
    return vseg;
}

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main()

int main	(	int	,
		const char **
	)

{
    auto nbim  = 5; // nb images
    int nbSegs = 40;
    auto vcol  = img::genRandomColors( nbSegs );

    auto func = [&](int i)   // lambda, needed to fetch color from index
    {
        return img::DrawParams().setColor(vcol[i]).showPoints();
//      return img::DrawParams().showIndex().setColor(vcol[i]).showPoints();
    };
    std::function<img::DrawParams(int)> f(func);

    for( int i=0; i<nbim; i++ )
    {
        auto vseg = generateSegments( nbSegs );
//      Image<SvgImage> im( im_w, im_h );
        Image<img::SvgImage> im( im_w, im_h );
        draw( im, vseg, f );

        std::ostringstream ossa;
//      ossa << "showcase19_" << std::setfill('0') << std::setw(2) << i << ".svg";
        ossa << "showcase19_" << std::setfill('0') << std::setw(2) << i << ".svg";
        im.write( ossa.str() );
    }
}

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Variable Documentation

im_h

auto im_h = 300

im_w

auto im_w = 400