Swimmy Bird AI

(function(){
  var counter = 0;
  function swimmyai() {
    var x = james.center.x;
    var y = james.center.y;
    var ice = iceburgs[0];
    if (ice) {
      if (x > ice.x + 100) ice = iceburgs[1];
      var top = ice.IceburgTopUnderWaterHeight + ice.IceburgTopY;
      var odx = ice.x - x;
      var by = ice.IceburgBottomY;
      var botcol = false;
      var topcol = false;
      var dt = .033;
      var y2 = y;
      var dy = james.dy;
      var dy2 = dy + 200;
      while (y > 0 || y2 > 0) {
        x += dt * 180;
        y += dt * dy;
        y2 += dt * dy2;
        dy -= 300 * dt;
        dy2 -= 300 * dt;
        if (x >= ice.x && x <= ice.x + 100) {
          botcol = botcol || y2 >= by - 10;
          topcol = topcol || y <= top + 10;
        }
      }
      if (!botcol && topcol && counter > 5) {
        $CVS.onclick();
        counter = 0;
      }
      counter++;
    }
    setTimeout(swimmyai,33);
  }
  swimmyai();
})()