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zoom.c
Package: leda.tar.gz [view]
Upload User: gzelex
Upload Date: 2007-01-07
Package Size: 707k
Code Size: 1k
Category:
Mathimatics-Numerical algorithms
Development Platform:
MultiPlatform
- #include <LEDA/plane.h>
- #include <LEDA/window.h>
- #include <math.h>
- main()
- {
- window W;
- W.init(-100000000, 100000000, -100000000);
- int n = W.read_int("n = ");
- list<segment> L;
- point c(0,0);
- segment s;
- double r = 1000000000;
- double alpha = 0;
- double d = 2*LEDA_PI/n;
- for(int i = 0; i<n; i++)
- { point p(rand_int(-10,+10),rand_int(-10,+10));
- s = segment(p,c.translate(alpha,r));
- L.append(s);
- alpha += d;
- }
- forall(s,L) W << s;
- point p,q;
- for(;;)
- { if (W.read_mouse(p)==3) break;
- W.read_mouse_rect(p,q);
- W.init(p.xcoord(),q.xcoord(),p.ycoord());
- forall(s,L) W << s;
- }
- return 0;
- }
