Flow Fields Attractor

function setup() {

  createCanvas(w=720, h=w);

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  colorMode(HSB);

  background(98);

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  push();

  strokeWeight(1);

  stroke(10, 0.25);

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  translate(w/2, h/2);

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  //de Jong Attractor Parameter

  let a = -1.4;

  let b = 1.4;

  let c = 1.7;

  let d = -1.4;

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  //Flow Field Parameter

  let noise_input_x = [0.8, 0.9, 0.5];

  let noise_input_y = [0.9, 0.8, 0.6];

  let noise_weight = 0.25;

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  //Draw Parameter

  let draw_scale = 150;

  let N = 100000;

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  let x = random(-1,1);

  let y = random(-1,1);

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    for(let i=0;i<N;i++){

      let dx = sin(y*a) + cos(x*b);

      let dy = sin(x*c) + cos(y*d);

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      dx += cos(TAU*noise(x*noise_input_x[0], y*noise_input_x[1], noise_input_x[2])) * noise_weight;

      dy += sin(TAU*noise(x*noise_input_y[0], y*noise_input_y[1], noise_input_y[2])) * noise_weight;

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      point(draw_scale * dx, draw_scale * dy);

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      x = dx;

      y = dy;

    }

  pop();

}

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//save PNG

function keyPressed() {

  let name = "img_" + month() + day() + hour() + minute() + second();

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  save(name + ".png");

}