public override double GetSurfacePointAltitudeNow(double lat, double lng, bool meters, int targetLevel)
{
if (level < targetLevel)
{
int yOffset = 0;
if (dataset.Mercator || dataset.BottomsUp)
{
yOffset = 1;
}
int xOffset = 0;
int xMax = 2;
int childIndex = 0;
for (int y1 = 0; y1 < 2; y1++)
{
for (int x1 = 0; x1 < xMax; x1++)
{
// if (level < (demEnabled ? 12 : dataset.Levels))
if (level < dataset.Levels && level < (targetLevel + 1))
{
Tile child = TileCache.GetCachedTile(childrenId[childIndex]);
if (child == null || !child.ReadyToRender)
{
countCreatedForNow++;
child = TileCache.GetTileNow(level + 1, x * 2 + ((x1 + xOffset) % 2), y * 2 + ((y1 + yOffset) % 2), dataset, this);
childrenId[childIndex] = child.Key;
}
childIndex++;
if (child != null)
{
if (child.IsPointInTile(lat, lng))
{
double retVal = child.GetSurfacePointAltitudeNow(lat, lng, meters, targetLevel);
if (retVal != 0)
{
return(retVal);
}
else
{
break;
}
}
}
}
}
}
}
return(GetAltitudeFromLatLng(lat, lng, meters));
}
public override double GetSurfacePointAltitudeNow(double lat, double lng, bool meters, int targetLevel)
{
if (level < targetLevel)
{
int yOffset = 0;
if (dataset.Mercator || dataset.BottomsUp)
{
yOffset = 1;
}
int xOffset = 0;
int xMax = 2;
int childIndex = 0;
for (int y1 = 0; y1 < 2; y1++)
{
for (int x1 = 0; x1 < xMax; x1++)
{
// if (level < (demEnabled ? 12 : dataset.Levels))
if (level < dataset.Levels && level < (targetLevel + 1))
{
Tile child = TileCache.GetTileNow(level + 1, x * 2 + ((x1 + xOffset) % 2), y * 2 + ((y1 + yOffset) % 2), dataset, this);
childrenId[childIndex++] = child.Key;
if (child != null)
{
if (child.IsPointInTile(lat, lng))
{
double retVal = child.GetSurfacePointAltitudeNow(lat, lng, meters, targetLevel);
if (retVal != 0)
{
return(retVal);
}
else
{
break;
}
}
}
}
}
}
}
double alt = GetAltitudeAtLatLng(lat, lng, meters ? 1 : DemScaleFactor);
return(alt);
}