createCanvas(400, 400);

  pixelDensity(1);

  loadPixels();

  console.log("pixel density: " + (pixelDensity()).toString());

  console.log("pixels count: " + (pixels.length/4).toString())

  /*

  for (let ni = 0; ni < pixels.length / 4; ni++) {

    let gs = 0;

    let x = (ni % height) - height / 2;

    let y = (floor(ni / height)) - width / 2;

    gs = gauss(x, y);

    //console.log("x: " + x.toString() + ", y: " + y.toString());

    pixels[4 * ni] = gs * 255;

    pixels[4 * ni + 1] = gs * 255;

    pixels[4 * ni + 2] = gs * 255;

    pixels[4 * ni + 3] = 255;

  }

  */

  updatePixels();

​

}

​

function draw() {

  loadPixels();

  for (let ni = 0; ni < pixels.length / 4; ni++) {

    let gs = 0;

    let x = (ni % height) - height / 2;

    let y = (floor(ni / height)) - width / 2;

    gs = gauss(x, y);

    //console.log("x: " + x.toString() + ", y: " + y.toString());

    pixels[4 * ni] = gs * 255;

    pixels[4 * ni + 1] = gs * 255;

    pixels[4 * ni + 2] = gs * 255;

    pixels[4 * ni + 3] = 255;

  }

  updatePixels();

}

​

function gauss(x, y) {

  let xx,yy,xy,mx,my;

  mx = mouseX/width*2-1;

  my = mouseY/height*2-1;

  //let M = math.matrix();

  let v = math.multiply([[x,y]],math.usolve([[mx*mx+0.1, mx*my],[my*mx,my*my+0.1]],[[x],[y]]));

  //console.log(exp(v[0,0]));

  return exp(-(v) / 1000);

}