// use this region update for when a new item has no interest area and doesnt need to update position
// (position update for it is done elsewhere) this is useful for projectiles and perhaps bots
public void UpdateRegionSimple()
{
Region newRegion = this.World.GetRegion(this.Position);
Region prevRegion = this.CurrentWorldRegion;
if (newRegion != this.CurrentWorldRegion)
{
if (this.regionSubscription != null)
{
this.regionSubscription.Dispose();
}
if (prevRegion != null)
{
prevRegion.DelistItem(this); // remove from regions item list
}
this.CurrentWorldRegion = newRegion;
if (newRegion == null)
{
log.InfoFormat("new region was NULL");
return;
}
newRegion.EnlistItem(this); // add to regions item list
this.regionSubscription = new UnsubscriberCollection(
this.EventChannel.Subscribe(this.Fiber, (m) => newRegion.ItemEventChannel.Publish(m)), // route events through region to interest area
newRegion.RequestItemEnterChannel.Subscribe(this.Fiber, (m) => { m.InterestArea.OnItemEnter(this.GetItemSnapshot()); }), // region entered interest area fires message to let item notify interest area about enter
newRegion.RequestItemExitChannel.Subscribe(this.Fiber, (m) => { m.InterestArea.OnItemExit(this); }) // region exited interest area fires message to let item notify interest area about exit
);
}
}
/// <summary>
/// Publishes a ItemPositionMessage in the PositionUpdateChannel
/// Subscribes and unsubscribes regions if changed.
/// </summary>
public void UpdateInterestManagement(bool sendMessage)
{
if (sendMessage)
{
// inform attached interst area and radar
ItemPositionMessage message = this.GetPositionUpdateMessage(this.Position);
this.positionUpdateChannel.Publish(message);
}
// Object obj = new Object();
// lock (obj)
{
// update subscriptions if region changed
Region prevRegion = this.CurrentWorldRegion;
Region newRegion = this.World.GetRegion(this.Position);
if (newRegion != this.CurrentWorldRegion)
{
this.CurrentWorldRegion = newRegion;
if (this.regionSubscription != null)
{
this.regionSubscription.Dispose();
}
var snapshot = this.GetItemSnapshot();
var regMessage = new ItemRegionChangedMessage(prevRegion, newRegion, snapshot);
if (prevRegion != null)
{
prevRegion.DelistItem(this); // remove from regions item list
prevRegion.ItemRegionChangedChannel.Publish(regMessage);
// i think for non avatar items like bullet - since they are not tied to ClientInterestArea
// their OnItemEnter and OnItemExit are empty or something idk. this was an attempt to
// manually unsub the fiber so that the on item enter/exit events don't keep getting called
// a good test would be to make the bullet last only .1sec so that it stays in only 1 region
// then see if the current setup removes the fiber subscription
//if (this.type == (byte)ItemType.Bullet)
//{
// Fiber.DeregisterSubscription(prevRegion.RequestItemEnterChannel);
// Fiber.DeregisterSubscription(prevRegion.RequestItemExitChannel);
// Fiber.DeregisterSubscription(this.eventChannel);
//}
}
if (newRegion != null)
{
newRegion.EnlistItem(this); // add to regions item list
newRegion.ItemRegionChangedChannel.Publish(regMessage);
this.regionSubscription = new UnsubscriberCollection(
this.EventChannel.Subscribe(this.Fiber, (m) => newRegion.ItemEventChannel.Publish(m)), // route events through region to interest area
newRegion.RequestItemEnterChannel.Subscribe(this.Fiber, (m) => { m.InterestArea.OnItemEnter(this.GetItemSnapshot()); }), // region entered interest area fires message to let item notify interest area about enter
newRegion.RequestItemExitChannel.Subscribe(this.Fiber, (m) => { m.InterestArea.OnItemExit(this); }) // region exited interest area fires message to let item notify interest area about exit
);
}
}
}
}