<iframe width='500px' height='400px' src='https://nest.ktbyte.com/nest#96011' allowfullscreen></iframe>

float x, y, xn, yn;
ArrayList<Float> xpts;
ArrayList<Float> ypts;
ArrayList<Float> xptsReflected;
ArrayList<Float> yptsReflected;

int nsides;

void setup()
{
  size(900, 900);
  nsides = 7;
}

void draw()
{
  background(255);
  
  xpts = new ArrayList<Float>();
  ypts = new ArrayList<Float>();
  xptsReflected = new ArrayList<Float>();
  yptsReflected = new ArrayList<Float>();
  
  for (float t = 0; t < TWO_PI - 0.01; t += TWO_PI/nsides){
    float xt = map(cos(t),-1,1,mouseX-100,mouseX+100);
    float yt = map(sin(t),-1,1,mouseY-100,mouseY+100);
    
    xpts.add(xt);
    ypts.add(yt);
  }
  
  
  noFill();
  stroke(120);
  ellipse(width/2, height/2, width/2, height/2);

  for (int i = 0; i < xpts.size(); i++)
  {
      x = map(xpts.get(i), 0, width, -2, 2);
      y = map(ypts.get(i), height, 0, -2, 2);

      float d = sqrt((x*x + y*y));
      float theta = atan2(y, x);

      xn = (1/d)*cos(theta);
      yn = (1/d)*sin(theta);

      float xpoint = map(x, -2, 2, 0, width);
      float ypoint = map(y, -2, 2, height, 0);
      
      


      //point(xpoint, ypoint);

      xpoint = map(xn, -2, 2, 0, width);
      ypoint = map(yn, -2, 2, height, 0);

      //point(xpoint, ypoint);
      xptsReflected.add(xpoint);
      yptsReflected.add(ypoint);
    
  }
  
  
  beginShape();
  fill(0,40);
  stroke(0);
  
  for (int i = 0; i < xpts.size(); i++)
  {
    float xt = xpts.get(i);
    float yt = ypts.get(i);
    vertex(xt,yt);
  }
  
  endShape(CLOSE);
  
  beginShape();
  fill(0,40);
  stroke(0);
  
  for (int i = 0; i < xpts.size(); i++)
  {
    float xt = xptsReflected.get(i);
    float yt = yptsReflected.get(i);
    vertex(xt,yt);
  }
  
  endShape(CLOSE);
    
    
}

void keyPressed() {
  if (keyCode == UP){
    nsides += 1;
  }
  else if (keyCode == DOWN){
    if (nsides > 3){
      nsides -= 1;
    }
  }
}