public void Dispose()
{
if (request != null)
{
request.Dispose();
request = null;
}
GC.SuppressFinalize(this);
}
public void Initialize()
{
if (IsInitialized)
{
return;
}
if (!File.Exists(TerrainTileFilePath))
{
// Download elevation
if (request == null)
{
using (request = new TerrainDownloadRequest(this, m_owner, Row, Col, TargetLevel))
{
request.SaveFilePath = TerrainTileFilePath;
request.DownloadInForeGround();
}
}
}
if (ElevationData == null)
{
ElevationData = new List <float>(SamplesPerTile * SamplesPerTile);
}
if (File.Exists(TerrainTileFilePath))
{
// Load elevation file
try
{
using (Stream s = File.OpenRead(TerrainTileFilePath))
{
byte[] tfBuffer = new byte[SamplesPerTile * SamplesPerTile * 2];
if (s.Read(tfBuffer, 0, tfBuffer.Length) == tfBuffer.Length)
{
int offset = 0;
for (int y = 0; y < SamplesPerTile; y++)
{
for (int x = 0; x < SamplesPerTile; x++)
{
ElevationData.Add(tfBuffer[offset++] + (short)(tfBuffer[offset++] << 8));
}
}
IsInitialized = true;
IsValid = true;
}
}
}
catch
{
}
if (!IsValid)
{
try
{
// Remove corrupt/failed elevation files after preset time.
FileInfo badFileInfo = new FileInfo(TerrainTileFilePath);
TimeSpan age = DateTime.Now.Subtract(badFileInfo.LastWriteTime);
if (age < BadTileRetryInterval)
{
// This tile is still flagged bad
IsInitialized = true;
return;
}
File.Delete(TerrainTileFilePath);
}
catch
{
}
}
}
}
