/*
  Here we're going to create basic Perlin Noise and draw it to the screen.
  
  Things to experiment with:
    - Instead of using X and Y as the parameters to noise(), try using different
      values based on X and Y: maybe x * 0.02
    - Try creating variations in the color produced for our pixels by using
      multiple noise() statements to generate different values for R G and B
    - Three Dimensions? The noise method can accept 2 or 3 parameters. What
      happens if you use a third parameter here? What value should you use?
      Try using a value that is incremented by a small amount each loop through
      the draw method.
*/
void setup() {

  // setup our screen
  size(200, 200);
  background(0);
  
}

void draw() {

  // clear the screen
  background(0);
  
  // calling the loadPixels method lets us work with the pixels[] array
  loadPixels();
  
  // loop across every pixel of the screen
  for (int x = 0; x < width; x++) {
    for (int y = 0; y < height; y++) {
    
      // generate a value from 0 to 255 using Perlin Noise
      int noiseVal = int(noise(x, y) * 255.0);
      
      // set the pixel at (X, Y) to the grayscale value we generated with the noise method
      pixels[x + y * width] = color(noiseVal);
      
    }
  }
  
  // tell processing to update our screen
  updatePixels();
  
}