public static void ProcessQueue(RenderContext renderContext)
{
while (queue.Count > 0 && openThreads > 0)
{
double minDistance = 100000.0f;
bool overlayTile = false;
string maxKey = null;
int level = 1000;
foreach (String key in queue.Keys)
{
Tile t = queue[key];
if (!t.RequestPending && t.InViewFrustum)
{
Vector3d vectTemp = Vector3d.MakeCopy(t.SphereCenter);
vectTemp.TransformByMatrics(renderContext.World);
if (renderContext.Space)
{
vectTemp.Subtract(Vector3d.Create(0.0f, 0.0f, -1.0f));
}
else
{
vectTemp.Subtract(renderContext.CameraPosition);
}
double distTemp = Math.Max(0, vectTemp.Length() - t.SphereRadius);
//if (t.Level < (level-1) || (distTemp < minDistance && t.Level == level))
bool thisIsOverlay = (t.Dataset.Projection == ProjectionType.Tangent) || (t.Dataset.Projection == ProjectionType.SkyImage);
if (distTemp < minDistance && (!overlayTile || thisIsOverlay))
{
minDistance = distTemp;
maxKey = t.Key;
level = t.Level;
overlayTile = thisIsOverlay;
}
}
}
if (maxKey != null)
{
Tile workTile = (Tile)queue[maxKey];
workTile.RequestPending = true;
openThreads--;
if (openThreads < 0)
{
openThreads = 0;
}
workTile.RequestImage();
if (workTile.Dataset.ElevationModel) // && workTile.Dataset.Projection == ProjectionType.Toast)
{
workTile.RequestDem();
}
}
else
{
return;
}
}
}
