appLabGame.js

//---- Game utility functions -------------------
function getBounds(id) {
  var x = getXPosition(id);
  var y = getYPosition(id);
  var w = parseInt(getAttribute(id, "width"));
  var h = parseInt(getAttribute(id, "height"));
  return {
    left: x,
    top: y,
    right: x + w,
    bottom: y + h,
    width: w,
    height: h
  };
}

function isTouching(id1, id2) {
  var box1 = getBounds(id1);
  var box2 = getBounds(id2);
  return (box1.left < box2.right &&
          box1.right > box2.left &&
          box1.top < box2.bottom &&
          box1.bottom > box2.top);
}

function isContained(id1, id2, debug) {
  var box1 = getBounds(id1);
  var box2 = getBounds(id2);
  if (debug) {
    console.log(box1, box2, "");
  }
  return (box1.right < box2.right &&
          box1.bottom < box2.bottom &&
          box1.top > box2.top &&
          box1.left > box2.left);
}

function animate(func) {
  var ts = new Date().getTime();
  setInterval(function() {
    var elapsed = new Date().getTime() - ts;
    func(elapsed / 1000);
    ts = new Date().getTime();
  }, (1000 / fps));
}
//-----------------------------------------------