goldenAngle

// engineer: jWilliam Dunn

// 2023.1109

​

let g,a=0;

const phi=(1+Math.sqrt(5))/2; //golden ratio

function ge(t) {

  return Math.pow(t,phi);

}

var in_out=(t,f) => (t<0.5) ? f(t*2.0)*0.5 : (1.0-f((1.0-t)*2.0))*0.5+0.5;

​

function setup() {

  createCanvas(510,510);

  noStroke();

  fill(224,165,38); //goldenrod color

  g=PI*(3.0-sqrt(5.0)); //golden angle

  frameRate(30);

}

function draw(){

  background(0);

  translate(width/2,height/2);

  scale(phi);

  for(let i=0;i<300;i++){

    push();translate(i*0.5,0);rotate(in_out(a/100.0,ge)*PI/2+g);

    rect(-(3.7+i*0.05)/2.0,-(3.7+i*0.05)/2.0, 3.7+i*0.05,3.7+i*0.05); pop();

    rotate(g);

  }

  a++;

  a=a%100;

}