andy function for checking if this object is just landed on a particular surface.
Be sure to check it before calling <code>super.update()</code>, as that will reset the flags.</p><p class="javadoc">Parameters:</p><table class="table table-bordered params"><tr><th style="width:25%;"><code>Direction</code></th><td><p>Any of the collision flags (e.g. <code>LEFT</code>, <code>FLOOR</code>, etc).</p></td></tr></table><p class="javadoc">Returns:</p><div class="indent inline-content"><p>Whether the object just lan