function setup() {

  createCanvas(windowWidth, windowHeight);

  background(0);

  translate(windowWidth/2, windowHeight/2);

  angleMode(DEGREES);

  p=createVector(0,0);

  for (let i=0;i<d;i++){

  let po=polar(r,theta)

  let x=po[0];

  let y=po[1];

  po=polar(r,-180+theta)

  let x1=po[0];

  let y1=po[1];

    theta+=180/d;

  ref=new refline(x,y,x1,y1)

    l.push(ref);

  }

​

}

​

function draw() {

  stroke(255);

  strokeWeight(0.1);

  p=createVector(mouseX-windowWidth/2,mouseY-windowHeight/2);

  translate(windowWidth/2, windowHeight/2);

  stroke(0,255,0);

  strokeWeight(5);

  point(p.x,p.y);

  strokeWeight(0.1);

  stroke(255);

  for (let i=0;i<l.length;i++){

  l[i].update(p);

  l[i].showpoint();

    //l[i].showline();

  }

}

​

function polar(r,theta){

  let x = r * cos(theta);

  let y = -r * sin(theta);

  return [x,y]

}

​

function windowResized() {

   resizeCanvas(windowWidth, windowHeight);

}