showcase15.cpp

/**
\file
\brief random points and a moving point, draw the nearest/farthest point segment
*/

//#define HOMOG2D_DEBUGMODE
#include "../../homog2d.hpp"

using namespace h2d;

int main( int, const char** )
{
	auto nbim = 20; // nb images

	auto cmax = 300;
	auto cmin = 20;

	int nbPts = 30;
	std::vector<Point2d> vec(nbPts);
	auto it = std::begin(vec);
	for( auto i=0; i<nbPts; i++ )
		*it++ = Point2d(
			1.0*rand() / RAND_MAX * (cmax-cmin) + cmin,
			1.0*rand() / RAND_MAX * (cmax-cmin) + cmin
	);
	auto k = 70.;
	auto x0 = 150;
	auto y0 = 150;

	for( int i=0; i<nbim; i++ )
	{
		img::Image<img::SvgImage> im( cmax+30, cmax+30 );


		draw( im, vec );

		auto angle = i*360./nbim;
		auto angle_r = angle * M_PI / 180.;
		auto x1 = std::cos(angle_r)*k;
		auto y1 = std::sin(angle_r)*k;
		Point2d pt( x1+x0,y1+y0);
		pt.draw( im, img::DrawParams().setColor(250,0,0).setPointStyle( img::PtStyle::Dot ) );
		auto pidx = findNearestFarthestPoint( pt, vec );
		Segment(vec[pidx.first],  pt).draw( im, img::DrawParams().setColor( 250,0,0) );
		Segment(vec[pidx.second], pt).draw( im, img::DrawParams().setColor( 0,250,0) );

		std::ostringstream oss;
		oss << "showcase15_" << std::setfill('0') << std::setw(2) << i << ".svg";
		im.write( oss.str() );
	}
}