----- Coding Tutorial by Patt Vira ----- 

Name: Donut (Torus and Super-Toroid)

Video Tutorial: https://youtu.be/p0uKK2jv_m0

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Connect with Patt: @pattvira

https://www.pattvira.com/

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*/

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let r1 = 100; let r2 = 50;

let angle = 0;

​

function setup() {

  createCanvas(400, 400, WEBGL);

  angleMode(DEGREES);

}

​

function draw() {

  background(0, 0, 100);

  orbitControl(1, 1);

  let t = 1;

  let s = 1;

  noFill();

  stroke(255);

  beginShape(POINTS);

  for(let theta=0; theta<360; theta+=10) {

    for (let phi=0; phi<360; phi+=10) {

      let a = cos(theta + angle);

      let b = sin(theta + angle);

      let c = cos(phi +  angle);

      let d = sin(phi +  angle);

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      let an = xn(a, t);

      let bn = xn(b, t);

      let cn = xn(c, s);

      let dn = xn(d, s);

​

      let x = (r1 + r2*cn)*an;

      let y = (r1 + r2*cn)*bn;

      let z = r2*dn;

      vertex(x, y, z);

    }

  }

  endShape();

  angle +=1;

}

​

function xn(x, n) {

  let xn = Math.sign(x) * pow(abs(x), n);

  return xn;

}