ar.pde

PVector[] pnts;
int[] cols = {#530c0c, #8f0e0e, #fa7e0a, #f7f6de};

public void setup() {
  size(540, 540);
  pnts = new PVector[5];
  for (int i = 0; i < pnts.length; i++) pnts[i] = new PVector();
  noSmooth();
  loadPixels();
}

public void draw() {
  float rot = frameCount*TWO_PI/200.0;
  background(255);
  for (int p = 0; p < pnts.length; p++) {
    float pAng = p*TWO_PI/pnts.length;
    pnts[p].z = sin(-rot + 3*pAng)*10;
    pnts[p].x = (cos(rot + pAng)/2 + 1)* width/2;
    pnts[p].y = (sin(rot + pAng)/2 + 1)* height/2;
  }
  for (int y = 0; y < height; y++) {
    for (int x = 0; x < width; x++) {
      float sum = 0;
      for (int p = 0; p < pnts.length; p++) {
        float dx = pnts[p].x - x;
        float dy = pnts[p].y - y;
        float d = sqrt(dx*dx + dy*dy);
        sum+=(pnts[p].z/max(1, d));
        fill(255);
      }
      sum*=width;
      int c = 3;
      if (abs(sum) > 120) c = 2;
      if (abs( sum + 10 ) < 20) c = 0;
      if (abs( sum - 10 ) < 20) c = 3;
      if (abs( abs(sum) - 100 ) < 20) c = 1;
      pixels[x + y * width] = color(cols[(int)constrain(c, 0, 3)]);
    }
  }
  updatePixels();
  if (frameCount < 200) saveFrame("/data/#######.png");
}