public static Tile GetTileNow(int level, int x, int y, IImageSet dataset, Tile parent)
{
if (level < dataset.BaseLevel)
{
return(null);
}
Tile retTile = null;
long tileKey = ImageSetHelper.GetTileKey(dataset, level, x, y);
try
{
if (!tiles.ContainsKey(tileKey))
{
retTile = ImageSetHelper.GetNewTile(dataset, level, x, y, parent);
tileMutex.WaitOne();
tiles.Add(tileKey, retTile);
tileMutex.ReleaseMutex();
}
else
{
retTile = tiles[tileKey];
}
}
catch
{
if (Earth3d.Logging)
{
Earth3d.WriteLogMessage("GetTile: Exception");
}
}
finally
{
//todoperf get rid of this write for GC
retTile.AccessCount = AccessID++;
}
// Create if not ready to render
if (!retTile.ReadyToRender)
{
TileCache.GetTileFromWeb(retTile, false);
retTile.CreateGeometry(Earth3d.MainWindow.RenderContext11, false);
}
return(retTile);
}
public static void QueueThread()
{
System.Threading.Thread.CurrentThread.CurrentCulture = new System.Globalization.CultureInfo("en-US", false);
bool fileOnly = fileOnlyThreadID == Thread.CurrentThread.ManagedThreadId;
while (running)
{
if (queue.Count < 1)
{
System.Threading.Thread.Sleep(50);
}
else
{
System.Threading.Thread.Sleep(1);
}
double minDistance = 1000000000000000000;
bool overlayTile = false;
long maxKey = 0;
int level = 1000;
queueMutex.WaitOne();
foreach (Tile t in queue.Values)
{
if (!t.RequestPending) // && t.InViewFrustum)
{
Vector3d vectTemp = new Vector3d(t.SphereCenter);
vectTemp.TransformCoordinate(Earth3d.WorldMatrix);
if (Earth3d.MainWindow.Space)
{
vectTemp.Subtract(new Vector3d(0.0f, 0.0f, -1.0f));
}
else
{
vectTemp.Subtract(Earth3d.MainWindow.RenderContext11.CameraPosition);
}
double distTemp = Math.Max(0, vectTemp.Length() - t.SphereRadius);
bool thisIsOverlay = (t.Dataset.Projection == ProjectionType.Tangent) || (t.Dataset.Projection == ProjectionType.SkyImage);
if (distTemp < minDistance && (!overlayTile || thisIsOverlay))
{
Tile test = (Tile)queue[t.Key];
if (!test.FileChecked)
{
test.FileExists = File.Exists(test.FileName);
test.FileChecked = true;
if (test.Volitile)
{
test.FileExists = false;
}
}
if (test.FileExists || (!test.FileExists && !fileOnly))
{
minDistance = distTemp;
maxKey = t.Key;
level = t.Level;
overlayTile = thisIsOverlay;
}
}
}
}
if (maxKey != 0)
{
Tile workTile = (Tile)queue[maxKey];
workTile.RequestPending = true;
TileCache.RequestCount++;
queueMutex.ReleaseMutex();
TileCache.GetTileFromWeb(workTile, true);
queueMutex.WaitOne();
TileCache.RequestCount--;
workTile.RequestPending = false;
queue.Remove(workTile.Key);
}
queueMutex.ReleaseMutex();
}
return;
}