coding/util_tester.html at gh-pages · isaacvr/coding · GitHub

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<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Utils Tester</title>
  </head>
  <body>

  </body>
  <script src="p5.min.js"></script>
  <script src="p5.dom.min.js"></script>
  <script src="complex.min.js"></script>
  <script src="utils.js"></script>
  <script>

    let plotter;
    let path = [];

    let scaleY = 5;
    let scaleX = 1 / scaleY;

    let FRAMES = 30;

    let label;

    function setup() {
      frameRate(FRAMES);

      let c = createCanvas(1500, 700);
      plotter = new Plotter(-750, 350, 750, -350);

      label = createP();
      slider = createSlider(1, 100, 1, 0.2);
      zx = createSlider(-200, 200, 0, 0.2);
      zy = createSlider(-200, 200, 0, 0.2);

      let ini = -3;
      let fin = 3;
      let f = 2;
      for (let i = ini; i <= fin; i += 0.001) {
        path.push( new Point(i / scaleX, sin(2 * PI * f * i) * scaleY ) );
      }
    }

    let index = 0;
    let offset = 1.8;
    let frec = offset;
    let transform = [];
    let slider;
    let zx;
    let zy;

    function draw() {
      background(0);
      plotter.drawAxes();

      plotter.zoom(new Complex(zx.value(), zy.value()), slider.value());

      plotter.drawPath(path.map(e => e.add(new Point(0, 40))), color(255, 45, 45), 5);

      let newPath = path.map(e => {
        return new Complex({
          arg: -PI * frec * e.re,
          abs: e.im * 8
        });
      });

      let cm = plotter.averagePoint(newPath);

      // console.log(cm);

      transform.push(new Point(frec * 20 - offset - 750, cm.im));

      plotter.drawPath(newPath, color(45, 45, 255), 5);
      plotter.drawPath(transform, color(255, 45, 45), 5);

      plotter.drawPoint(cm, color(45, 255, 45));

      label.html('FREQ: ' + frec);

      frec += 0.0005;

      if (frec > 100) {
        noLoop();
      }

    }
  </script>
</html>