// Daniel Shiffman

// http://natureofcode.com

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// A fixed boundary class

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// A boundary is a simple rectangle with x,y,width,and height

class Boundary {

  constructor(x, y, w, h) {

    // But we also have to make a body for box2d to know about it

    // Body b;

​

    this.x = x;

    this.y = y;

    this.w = w;

    this.h = h;

​

    let fd = new box2d.b2FixtureDef();

    fd.density = 1.0;

    fd.friction = 0.5;

    fd.restitution = 0.2;

​

    let bd = new box2d.b2BodyDef();

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    bd.type = box2d.b2BodyType.b2_staticBody;

    bd.position.x = scaleToWorld(this.x);

    bd.position.y = scaleToWorld(this.y);

    fd.shape = new box2d.b2PolygonShape();

    fd.shape.SetAsBox(this.w / (scaleFactor * 2), this.h / (scaleFactor * 2));

    this.body = world.CreateBody(bd).CreateFixture(fd);

  }

​

  // Draw the boundary, if it were at an angle we'd have to do something fancier

  display() {

    fill(127);

    stroke(200);

    rectMode(CENTER);

    rect(this.x, this.y, this.w, this.h);

  }

}