多環の球

/**
* multi-ringed sphere
*
* @author aa_debdeb
* @date 2016/08/22
*/

float step = 5;
color c1 = color(0, 206, 209);
color c2 = color(255, 215, 0);

void setup(){
  size(500, 500, P3D);  
  noFill();
}

void draw(){
  background(0);
  translate(width / 2, height / 2);
  for(float d = step; d <= 400; d += step){
    pushMatrix();
    rotateX(frameCount * 0.001 * map(d, step, 400, 1, 3));
    rotateY(frameCount * 0.002 * map(d, step, 400, 1, 3));
    rotateZ(frameCount * 0.003 * map(d, step, 400, 1, 3));    
    stroke(map(d, step, 400, red(c1), red(c2)),
           map(d, step, 400, green(c1), green(c2)),
           map(d, step, 400, blue(c1), blue(c2)));
    ellipse(0, 0, d, d);
    popMatrix();
  }
}