Sierpinsky Carpet bömbing; stylish fractal things + parallax scrolling

flatenthemout.pde

// PDE 3.02
// Sierpinski's Carpet bömbing (v3)
// updt: better, faster, interactive

PImage img = createImage(729,729, RGB);

void setup()
{
  size( 729, 729, P2D ); //729 243 324
}

void draw()
{  
  int inrow = 0;
  int _t = int(millis()*0.01);

  img.loadPixels();

  for(int y = 0; y < height; y++)
  for(int x = 0; x < width;  x++)
  {
      int ax = x + _t; 
      int ay = y + _t;
    
      if (   (x      %3 == 0  &&  ay    %3 == 2) || // 0 2
            ((x / 3) %3 == 1  && (ay/3) %3 == 1) || // 1 1
            ((ax/ 9) %3 == 0  && (y/ 9) %3 == 2) || // 0 2
            ((ax/27) %3 == 0  && (y/27) %3 == 2) || // 0 2
            ((ax/81) %3 == 0  && (y/81) %3 == 2) || // 0 2
            ((ax/243)%3 == 1  && (y/243)%3 == 1) )  // 1 1
      { 
        img.pixels[width * y + x] = color( ((ax+ay)/8)%3*50 + sin(ax*0.18)*(40-inrow) );
        if (inrow < 40) inrow++;
      }
      else
      {
        img.pixels[width * y + x] = color(255 - random(0,3)*((ax+y) % 81) );
        inrow = 0;
      }
  } 
  
  img.updatePixels();  
  
  // interactive delayed zoom, depending on mouse movement
  tint(255, 235, 225 - min(abs(mouseX-pmouseX),20), 255 - min(abs(mouseX-pmouseX),200) );
  
  // render buffer
  image(img, -mouseX, -mouseX, width + mouseX*2, height + mouseX*2);  
}