/** 
a lissajous explorer by <a href="http://www.local-guru.net/blog">guru</a>
*/

float fx = 1;
float fy = 1;

void setup() {
  size(300,300,P2D);
  smooth();
}

void draw() {
  background(0);
  stroke( 255,50 );
  translate( width/2, height/2 );
  PVector last = new PVector( 100,0);
  for( int i = 0; i < 72000; i++) {
    PVector p = new PVector( 
      cos( radians(i) * fx ) * (100 + i/2000),
      sin( radians(i) * fy ) * (100 + i/2000)
    );
    line( last.x, last.y, p.x, p.y );
    
    last = p;
  }  
}

void mousePressed() {
  fx = map( mouseX, 0, width, 0.1, 1);
  fy = map( mouseY, 0, width, 0.1, 1);
}

void mouseDragged() {
  fx = map( mouseX, 0, width, 0.1, 1);
  fy = map( mouseY, 0, width, 0.1, 1);
}