private void UnregisterFromNeighbors()
{
// Remove this section from its subscribers
foreach (var info in Subscribers)
{
ChunkEvent subscriber = info;
if (subscriber == null)
{
continue;
}
// Unregistration needs to be done both ways
subscriber.Register(this, false);
Register(subscriber, false);
}
}
public bool Register(IEventBase <ChunkState> section, bool registerListener)
{
// The idea here is to register each neighbor on the main thread. Once a section gathers
// 4 notifications from its' neighbors chunk generation can be started.
// Expect the input to be correct
Assert.IsTrue(section != null);
// Register
if (registerListener)
{
// Make sure this section is not registered yet
ChunkEvent newSection = (ChunkEvent)section;
int firstNullIndex = -1;
for (int i = 0; i < Subscribers.Length; i++)
{
ChunkEvent s = Subscribers[i];
if (s == null)
{
firstNullIndex = i;
continue;
}
if (s == newSection)
{
return(false);
}
}
if (firstNullIndex < 0)
{
return(false);
}
Assert.IsTrue(section != this, "Trying to register the section to itself");
Assert.IsTrue(SubscribersCurr < Subscribers.Length, string.Format("ChunkEvent.Register: Condition {0} < {1} not met", SubscribersCurr, Subscribers.Length));
// New registration, remember the subscriber and increase subscriber count
Subscribers[firstNullIndex] = (ChunkEvent)section;
++SubscribersCurr;
if (SubscribersCurr != Subscribers.Length)
{
return(false);
}
}
// Unregister
else
{
// Only unregister already registered sections
int i;
for (i = 0; i < Subscribers.Length; i++)
{
var item = Subscribers[i];
if (item != section)
{
continue;
}
break;
}
if (i >= Subscribers.Length)
{
return(false);
}
Assert.IsTrue(section != this, "Trying to unregister the section from itself");
Assert.IsTrue(SubscribersCurr > 0, string.Format("ChunkEvent.Unregister: Condition '{0} > 0' not met", SubscribersCurr));
// Unregister
--SubscribersCurr;
Subscribers[i] = null;
if (SubscribersCurr != 0)
{
return(false);
}
}
OnRegistered(registerListener);
return(true);
}
private void QueueSetBlock(Chunk chunk, int bx, int by, int bz, BlockData block)
{
// Ignore attempts to change the block into the same one
if (block.BlockType == Blocks[bx, by, bz].BlockType)
{
return;
}
int cx = chunk.Pos.X;
int cy = chunk.Pos.Y;
int cz = chunk.Pos.Z;
int subscribersMask = 0;
// Iterate over neighbors and decide which ones should be notified to rebuild
for (int i = 0; i < Subscribers.Length; i++)
{
ChunkEvent subscriber = Subscribers[i];
if (subscriber == null)
{
continue;
}
Chunk subscriberChunk = (Chunk)subscriber;
if (subscriberChunk.Pos.X == cx && (
// Section to the left
((bx == 0) && (subscriberChunk.Pos.X + 1 == cx)) ||
// Section to the right
((bx == EngineSettings.ChunkConfig.Mask) && (subscriberChunk.Pos.X - 1 == cx))
))
{
subscribersMask = subscribersMask | (1 << i);
}
if (subscriberChunk.Pos.Y == cy && (
// Section to the bottom
((by == 0) && (subscriberChunk.Pos.Y + 1 == cy)) ||
// Section to the top
((by == EngineSettings.ChunkConfig.Mask) && (subscriberChunk.Pos.Y - 1 == cy))
))
{
subscribersMask = subscribersMask | (1 << i);
}
if (subscriberChunk.Pos.Z == cz && (
// Section to the back
((bz == 0) && (subscriberChunk.Pos.Z + 1 == cz)) ||
// Section to the front
((bz == EngineSettings.ChunkConfig.Mask) && (subscriberChunk.Pos.Z - 1 == cz))
))
{
subscribersMask = subscribersMask | (1 << i);
}
}
// Request update for the block
m_setBlockQueue.Add(
new SetBlockContext(chunk, bx, by, bz, block, subscribersMask)
);
}