this.a = a;

  this.b = b;

  this.h1 = null;

  this.h2 = null;

​

  this.show = function() {

    stroke(255, 50);

    // line(this.a.x, this.a.y, this.b.x, this.b.y);

    this.h1.show();

    this.h2.show();

  };

​

  this.hankin = function(sides) {

    var mid = p5.Vector.add(this.a, this.b);

    mid.mult(0.5);

​

    var v1 = p5.Vector.sub(this.a, mid);

    var v2 = p5.Vector.sub(this.b, mid);

    // Edge length

    var elen = v1.mag() + delta;

    var offset1 = mid;

    var offset2 = mid;

    if (delta > 0) {

      v1.setMag(delta);

      v2.setMag(delta);

      offset1 = p5.Vector.add(mid, v2);

      offset2 = p5.Vector.add(mid, v1);

    }

    v1.normalize();

    v2.normalize();

​

    v1.rotate(radians(-angle));

    v2.rotate(radians(angle));

    // Law of sines right here!

    // Ca

    var interior = (sides - 2) * PI / sides;

    var alpha = interior * 0.5;

    var beta = PI - radians(angle) - alpha;

    hlen = (elen * sin(alpha)) / sin(beta);

    v1.setMag(hlen);

    v2.setMag(hlen);

​

    this.h1 = new Hankin(offset1, v1);

    this.h2 = new Hankin(offset2, v2);

  };

}