Push Pop.

The push() and pop() functions allow for more control over transformations.
The push function saves the current coordinate system to the stack
and pop() restores the prior coordinate system.

Created 26 October 2002

 
float a;                          // Angle of rotation
float offset = PI/24;             // Angle offset between boxes
int num = 12;                     // Number of boxes
color[] colors = new color[num];  // Colors of each box
color safecolor;

boolean pink = true;

void setup() 
{ 
  size(200, 200, P3D);
  noStroke();  
  frameRate(30);
  safecolor = color(153, 153, 153);
  for(int i=0; i<num; i++) {
    colors[i] = color(255 * (i+1)/num, 153 * (num-i)/num, 204);
  }
  lights();
} 
 

void draw() 
{     
  background(0, 0, 26);
      
  translate(width/2, height/2, -20);
  a+=0.04;
  if(a >= TWO_PI*2) { 
    a = 0.0; 
  }    
  for(int i=0; i<num; i++) {
    pushMatrix();
    fill(colors[i]);
    rotateY(a+offset*i);
    rotateX(a/2+offset*i);
    box(width/2);
    popMatrix();
  }
}