Get nearest entity

findNearestEntity: function() {
    var nearestDistance = Infinity;
    var nearestEntity = null;
    for( var i = 0; i < ig.game.entities.length; i++ ) {
        var ent = ig.game.entities[i];
        var distance = this.distanceTo( ent );
        if( distance < nearestDistance && ent != this ) {
            nearestDistance = distance;
            nearestEntity = ent;
        }
    }
    return nearestEntity;
}