Color Gradients 1-7

clrGrad_1_7.pde

size(512, 256);
loadPixels();

int len = pixels.length;

float h = float(height); 
float w = float(width); 
float diamonds = TWO_PI * 8; 
float red;
float green;
float blue;

boolean rule;

for (int y = 0, i = 0; y < height; ++y) {
  for (int x = 0; x < width; ++x, ++i) {
    rule = cos(y / h * diamonds)
      < cos(x / w * diamonds);
    if (rule) {
      red = map(x, 0, w, 54, 255);
      green = map(y, 0, h, 0, 54);
      blue = map(i, 0, len, 255, 127);
    } else {
      red = map(x, 0, w, 255, 0);
      green = map(y, 0, h, 127, 255);
      blue = map(i, 0, len, 127, 54);
    }
    pixels[i] = color(red, green, blue);
  }
}
updatePixels();