Month: December 2011

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...
public override function create():void
{
	friction = 0; //this is very important, otherwise objects on conveyor will be moving with different speed
	reportBeginContact = true;
	reportEndContact = true;
 
	super.create();
 
	listenWhileVisible(this, ContactEvent.BEGIN_CONTACT, onBeginContact);
	listenWhileVisible(this, ContactEvent.END_CONTACT, onEndContact);
}
 
public override function update(param:Param):void //your own update function, calls every frame
{
	//set velocity to objects lying on the conveyor belt, I'm only using horizontal velocity here
	//_dir - direction, where object on conveyor should move to
	//_shape._normal - only the "y" of the normal, when object has contacted conveyor, in my case it can be only 1(from above) or -1(from below)
	for each(_shape in _shapes) //go through all the objects, contacting conveyor
	{
		_shape2 = _shape._shape;
		_shape2.b2body.SetLinearVelocity(new V2(_dir*_shape._normal*_speed, 0));
	}
}
 
protected function onBeginContact(event:ContactEvent):void
{
	//add object and its contact normal to the list
	//event.other.m_userData - our object
	//event.normal - our normal of the contact, that points from conveyor belt to object
	//if event.normal.y > 0, object has contacted conveyor from below
	//if event.normal.y  0 ? -1 : 1)));
}
 
protected function onEndContact(event:ContactEvent):void
{
	//remove object, that is not contacting with conveyor from the list
	...
}

... public override function create():void { friction = 0; //this is very important, otherwise objects on conveyor will be moving with different speed reportBeginContact = true; reportEndContact = true; super.create(); listenWhileVisible(this, ContactEvent.BEGIN_CONTACT, onBeginContact); listenWhileVisible(this, ContactEvent.END_CONTACT, onEndContact); } public override function update(param:Param):void //your own update function, calls every frame { //set velocity to objects lying on the conveyor belt, I'm only using horizontal velocity here //_dir - direction, where object on conveyor should move to //_shape._normal - only the "y" of the normal, when object has contacted conveyor, in my case it can be only 1(from above) or -1(from below) for each(_shape in _shapes) //go through all the objects, contacting conveyor { _shape2 = _shape._shape; _shape2.b2body.SetLinearVelocity(new V2(_dir*_shape._normal*_speed, 0)); } } protected function onBeginContact(event:ContactEvent):void { //add object and its contact normal to the list //event.other.m_userData - our object //event.normal - our normal of the contact, that points from conveyor belt to object //if event.normal.y > 0, object has contacted conveyor from below //if event.normal.y 0 ? -1 : 1))); } protected function onEndContact(event:ContactEvent):void { //remove object, that is not contacting with conveyor from the list ... }