starWarp<br>

// Equations from http://oolong.co.uk/Trochor.htm (Fergus Crawshay(Ray) Murray)

// sin, cos, frameCount, TWO_PI, vertex, phase

// no interaction

// bit of a mess in Java mode.

​

int numPoints = 300;

float incr = TWO_PI/float(numPoints);

float R = 150;

float r = R/2.5; 

float numTurns  = 1;

float ratio = 2;

float phi = 0;

​

void setup() {

  size(550, 550); 

  colorMode(HSB, 360, 100, 100);

  noFill();

}

​

void draw() {

  background(340);

  translate(width/2, height/2);

  phi = frameCount * .02;

​

  stroke(#054B0D);

  strokeWeight(20);

  drawShape(0);

  rotate(sin(frameCount * .05)*.07);

  stroke(340);

  strokeWeight(3);

  drawShape(0);

  //rotate(cos(frameCount * .005) * PI);

​

  stroke(#054B0D);

  strokeWeight(20);

  drawShape(PI);

  rotate(sin(frameCount * .05)*.07);

  stroke(340);

  strokeWeight(3);

  drawShape(PI);

}

​

void drawShape(float a) { 

  beginShape();

  for (float i = 0; i <= TWO_PI * numTurns; i += incr) {

    float x = R * cos (i) + r * cos (ratio * i + (phi+a));

    float y = R * sin (i) + r * sin (ratio * i - (phi+a));

    vertex(x, y);

  }

  endShape();

}

​