/// <summary>
/// Loads the backing store landblock structure<para />
/// This function is thread safe
/// </summary>
/// <param name="iBlockCellID">Any instance + landblock + cell ID within the landblock</param>
public static Landblock get_landblock(ulong iBlockCellID)
{
/*if ((iBlockCellID | 0xFFFF) == 0x1D9FFFF)
* {
* Console.WriteLine(System.Environment.StackTrace);
* var debug = true;
* }*/
if (PhysicsEngine.Instance.Server)
{
var lbmLandblock = LandblockManager.GetLandblock(iBlockCellID, false, false);
return(lbmLandblock.PhysicsLandblock);
}
// client implementation
/*if (Landblocks == null || Landblocks.Count == 0)
* return null;
*
* if (!LandDefs.inbound_valid_cellid(cellID) || cellID >= 0x100)
* return null;
*
* var local_lcoord = LandDefs.blockid_to_lcoord(LoadedCellID);
* var global_lcoord = LandDefs.gid_to_lcoord(cellID);
*
* var xDiff = ((int)global_lcoord.Value.X + 8 * MidRadius - (int)local_lcoord.Value.X) / 8;
* var yDiff = ((int)global_lcoord.Value.Y + 8 * MidRadius - (int)local_lcoord.Value.Y) / 8;
*
* if (xDiff < 0 || yDiff < 0 || xDiff < MidWidth || yDiff < MidWidth)
* return null;
*
* return Landblocks[yDiff + xDiff * MidWidth];*/
var iLandblockID = iBlockCellID | 0xFFFF;
// check if landblock is already cached
if (Landblocks.TryGetValue(iLandblockID, out var landblock))
{
return(landblock);
}
lock (landblockMutex)
{
// check if landblock is already cached, this time under the lock.
if (Landblocks.TryGetValue(iLandblockID, out landblock))
{
return(landblock);
}
// if not, load into cache
var instance = BlockCell.GetInstance(iLandblockID);
landblock = new Landblock(DBObj.GetCellLandblock((uint)iLandblockID), instance);
if (Landblocks.TryAdd(iLandblockID, landblock))
{
landblock.PostInit();
}
else
{
Landblocks.TryGetValue(iLandblockID, out landblock);
}
return(landblock);
}
}