/*
 * ARTS 102 - Aesthetics of the Algorithmic Image
 * Johannes Goerz (johannes.goerz@gmail.com)
 * 2005-10-19
 */

int XSIZE = 400;
int YSIZE = 400;

void setup() {
  size(XSIZE,YSIZE);
  background(0);
  noLoop();
}

void draw() {
  float xblocks = 1; // # horizontal iterations 
  float yblocks = 1; // # vertical iterations 
  float amp = 255/2;


  for (int y=1; y<YSIZE; y++) {
    for (int x=1; x<XSIZE; x++) {

      float i = PI*x*xblocks/XSIZE;
      float j = PI*y*yblocks/YSIZE;
     
      float a = cos(tan(i))*cos(tan(j))*amp;
  
      float colorR = a * a / 2;
      float colorG = a * 2;
      float colorB = a / 2;
      
      color c = color(colorR, colorG, colorB);
      set(x,y,c);
    }
  }
}