(function() {
    var _entityID = null;
	var sphereGravTimer;
	
	
	function sphereGrav() {
		var pos = Entities.getEntityProperties(_entityID, ["position"])["position"];
		
		var surfaceNormal = Vec3.subtract(MyAvatar.position,pos);
		
		var rot = Quat.multiply(Quat.rotationBetween(Quat.getUp(MyAvatar.orientation),surfaceNormal),MyAvatar.orientation);
		
		MyAvatar.orientation = rot;
		return;
	}
	
    this.preload = function(entityID) {
        _entityID = entityID;
    };
	
    this.enterEntity = function(entityID) {
		sphereGravTimer = Script.setInterval(sphereGrav, 100);
    };
	
    this.leaveEntity = function(entityID) {
		Script.clearInterval(sphereGravTimer);
		MyAvatar.orientation = {w:1, x:0, y:0, z:0};
    };
})