offSquare<br>

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

// sin, cos, frameCount, TWO_PI, vertex

// 17 wobbly rectangles

// no interaction

​

int numPoints ;

float incr, R1, numTurns, phi, sw1, ratio1; 

​

​

void setup() {

  size(700, 600); 

  numPoints = 200;

  incr = TWO_PI/float(numPoints);

  numTurns = 1;

  ratio1 = 3;

  stroke(255);

  noFill();

}

​

void draw() {

  background(#379CED);

  translate(width/2, height/2);

  rotate(-sin(frameCount * .005));

  phi = frameCount * .01;

  R1 = 220;

  sw1 = 18;

  for (int i = 0; i <= 16; i++) {

    drawShape(R1, R1/5, ratio1, sw1);

    R1 *= .85;

    sw1 *= .8;

  }

}

​

void drawShape(float R, float r, float ratio, float sw) {

  strokeWeight(sw);

  beginShape();

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

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

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

    vertex(x, y);

  }

  endShape();

}

​