/** Return the next column that should be removed from the scene */
public ColumnDestroyTask GetNextDestroyColumn()
{
lock (unloadQueue)
{
if (unloadQueue.Count > 0)
{
ColumnDestroyTask result = unloadQueue[0];
unloadQueue.RemoveAt(0);
return(result);
}
else
{
return(null);
}
}
}
/** Given a rectangle with corners 'min' and 'max', unload all the chunks not within the rectangle */
public void UnloadInRange(Vector2i min, Vector2i max)
{
// helper variables
int xMin = min.x;
int zMin = min.z;
int xMax = max.x;
int zMax = max.z;
List <Vector2i> removal = new List <Vector2i>();
// mark positions for removal
lock (this)
{
foreach (Vector2i pos in loadedData.Keys)
{
if (pos.x < xMin || pos.z < zMin || pos.x > xMax || pos.z > zMax)
{
removal.Add(pos);
}
}
}
// remove columns outside of range
foreach (Vector2i pos in removal)
{
lock (this)
{
loadedData.Remove(pos);
}
}
// call removal events
foreach (Vector2i pos in removal)
{
ColumnDestroyTask task = new ColumnDestroyTask(pos);
bool contains;
lock (this) contains = renderedData.Remove(pos);
if (contains)
{
lock (unloadQueue) unloadQueue.Add(task);
}
}
}
