private void OnEntityLeave(EntityLeaveAreaEventArgs e)
{
var handler = EntityLeave;
if (handler != null)
{
handler(this, e);
}
}
private void AreaEntityLeave(object sender, EntityLeaveAreaEventArgs e)
{
#if DEBUG
// temp counter
Interlocked.Increment(ref EntityAreaChangesCount);
#endif
// we need to tell entity which areas are far away and not need to listen anymore
double tooFarAway = MapArea.AreaSize.X * MapArea.AreaSize.X + MapArea.AreaSize.Y * MapArea.AreaSize.Y;
var currentArea = GetArea(new Vector3D(e.Entity.DynamicEntity.Position.X, 0,
e.Entity.DynamicEntity.Position.Z));
var previousArea = GetArea(new Vector3D(e.PreviousPosition.X, 0,
e.PreviousPosition.Z));
for (int x = -1; x < 2; x++)
{
for (int z = -1; z < 2; z++)
{
var prev = GetArea(new Vector3D(e.PreviousPosition.X + x * MapArea.AreaSize.X, 0,
e.PreviousPosition.Z + z * MapArea.AreaSize.Y));
if (Vector2I.DistanceSquared(currentArea.Position, prev.Position) > tooFarAway)
{
// area is too far away, stop listening it
e.Entity.RemoveArea(prev);
// tell them that entity goes away
prev.OnEntityOutOfViewRange(e.Entity);
}
var now = GetArea(new Vector3D(e.Entity.DynamicEntity.Position.X + x * MapArea.AreaSize.X, 0,
e.Entity.DynamicEntity.Position.Z + z * MapArea.AreaSize.Y));
if (Vector2I.DistanceSquared(previousArea.Position, now.Position) > tooFarAway)
{
// area is too far away from previous center, listen it
e.Entity.AddArea(now);
// tell them that they should listen new entity
now.OnEntityInViewRange(e.Entity);
}
}
}
e.Entity.CurrentArea = currentArea;
currentArea.AddEntity(e.Entity);
}