protected virtual void ChangeRegion(Region from, Region to)
{
m_CurrentRegion = to;
if (m_RegionSubscription != null)
{
m_RegionSubscription.Dispose();
}
var msg = new EntityRegionChangedMessage(from, to, m_AttachedEntity);
if (from != null)
{
from.EntityRegionChangedChannel.Publish(msg);
}
if (to != null)
{
to.EntityRegionChangedChannel.Publish(msg);
m_RegionSubscription = new UnsubscriberCollection(
//this.EventChannel.Subscribe(this.Fiber, (m) => newRegion.ItemEventChannel.Publish(m)), // route events through region to interest area
// region entered interest area fires message to let item notify interest area about enter
to.RequestInfoInRegionChannel.Subscribe(m_EntityFiber, (m) => { m.OnEntityEnter(m_AttachedEntity); }),
// region exited interest area fires message to let item notify interest area about exit
to.RequestRegionExitInfoChannel.Subscribe(m_EntityFiber, (m) => { m.OnEntityExit(m_AttachedEntity); })
);
}
}
protected void OnEntityRegionChange(EntityRegionChangedMessage message)
{
if (message.Entity == m_AttachedEntity)
{
return;
}
var r0 = m_Regions.Contains(message.From);
var r1 = m_Regions.Contains(message.To);
if (r0 && r1)
{
// do nothing
}
else if (r0) // item exits area
{
OnEntityExit(message.Entity);
}
else if (r1) // item enters area
{
OnEntityEnter(message.Entity);
}
}
