private void ProcessCacheFile()
{
try
{
string cachefilename = m_cache.CacheDirectory +
string.Format("\\{0}\\WFS\\{1}\\{2}_{3}_{4}_{5}.xml.gz",
this.m_world.Name, this.name, this.west, this.south, this.east, this.north);
GZipInputStream instream = new GZipInputStream(new FileStream(cachefilename, FileMode.Open));
XmlDocument gmldoc = new XmlDocument();
gmldoc.Load(instream);
XmlNamespaceManager xmlnsManager = new XmlNamespaceManager(gmldoc.NameTable);
xmlnsManager.AddNamespace("gml", "http://www.opengis.net/gml");
//HACK: Create namespace using first part of Label Field
string labelnmspace = labelfield.Split(':')[0];
if (labelnmspace == "cite")
{
xmlnsManager.AddNamespace(labelnmspace, "http://www.opengeospatial.net/cite");
}
else if (labelnmspace == "topp")
{
xmlnsManager.AddNamespace(labelnmspace, "http://www.openplans.org/topp");
}
XmlNodeList featureList = gmldoc.SelectNodes("//gml:featureMember", xmlnsManager);
if (featureList != null)
{
ArrayList placenameList = new ArrayList();
foreach (XmlNode featureTypeNode in featureList)
{
XmlNode typeNameNode = featureTypeNode.SelectSingleNode(typename, xmlnsManager);
if (typeNameNode == null)
{
Log.Write(Log.Levels.Debug, "No typename node: " + typename);
continue;
}
XmlNode labelNode = typeNameNode.SelectSingleNode(labelfield, xmlnsManager);
if (labelNode == null)
{
Log.Write(Log.Levels.Debug, "No label node: " + labelfield);
continue;
}
XmlNodeList gmlCoordinatesNodes = featureTypeNode.SelectNodes(".//gml:Point/gml:coordinates", xmlnsManager);
if (gmlCoordinatesNodes != null)
{
foreach (XmlNode gmlCoordinateNode in gmlCoordinatesNodes)
{
//Log.Write(Log.Levels.Debug, "FOUND " + gmlCoordinatesNode.Count.ToString() + " POINTS");
string coordinateNodeText = gmlCoordinateNode.InnerText;
string[] coords = coordinateNodeText.Split(',');
WorldWindPlacename pn = new WorldWindPlacename();
pn.Lon = float.Parse(coords[0], System.Globalization.CultureInfo.InvariantCulture);
pn.Lat = float.Parse(coords[1], System.Globalization.CultureInfo.InvariantCulture);
pn.Name = labelNode.InnerText;
placenameList.Add(pn);
}
}
}
m_placeNames = (WorldWindPlacename[])placenameList.ToArray(typeof(WorldWindPlacename));
}
if (m_placeNames == null)
{
m_placeNames = new WorldWindPlacename[0];
}
}
catch //(Exception ex)
{
//Log.Write(ex);
if (m_placeNames == null)
{
m_placeNames = new WorldWindPlacename[0];
}
m_failed = true;
}
finally
{
m_dlInProcess = false;
}
}
/// <summary>
/// Loads visible place names from one file.
/// </summary>
void UpdateNames(WorldWindPlacenameFile placenameFileDescriptor, ArrayList tempPlacenames, DrawArgs drawArgs)
{
// TODO: Replace with bounding box frustum intersection test
double viewRange = drawArgs.WorldCamera.TrueViewRange.Degrees;
double north = drawArgs.WorldCamera.Latitude.Degrees + viewRange;
double south = drawArgs.WorldCamera.Latitude.Degrees - viewRange;
double west = drawArgs.WorldCamera.Longitude.Degrees - viewRange;
double east = drawArgs.WorldCamera.Longitude.Degrees + viewRange;
if (placenameFileDescriptor.north < south)
{
return;
}
if (placenameFileDescriptor.south > north)
{
return;
}
if (placenameFileDescriptor.east < west)
{
return;
}
if (placenameFileDescriptor.west > east)
{
return;
}
string dataFilePath = Path.Combine(Path.GetDirectoryName(m_placenameListFilePath), placenameFileDescriptor.dataFilename);
using (BufferedStream dataFileStream = new BufferedStream(File.Open(dataFilePath, FileMode.Open, FileAccess.Read, FileShare.Read)))
using (BinaryReader dataFileReader = new BinaryReader(dataFileStream, System.Text.Encoding.ASCII))
{
WorldWindPlacenameFile dataFile = new WorldWindPlacenameFile();
dataFile.dataFilename = placenameFileDescriptor.dataFilename;
dataFile.north = placenameFileDescriptor.north;
dataFile.south = placenameFileDescriptor.south;
dataFile.west = placenameFileDescriptor.west;
dataFile.east = placenameFileDescriptor.east;
int numberPlacenames = dataFileReader.ReadInt32();
tempPlacenames.Capacity = tempPlacenames.Count + numberPlacenames;
WorldWindPlacename curPlace = new WorldWindPlacename();
for (int i = 0; i < numberPlacenames; i++)
{
if (m_placeNames != null && curPlaceNameIndex < m_placeNames.Length)
{
curPlace = m_placeNames[curPlaceNameIndex];
}
string name = dataFileReader.ReadString();
float lat = dataFileReader.ReadSingle();
float lon = dataFileReader.ReadSingle();
int c = dataFileReader.ReadInt32();
// Not in use, removed for speed
// Hashtable metaData = new Hashtable(c);
for (int n = 0; n < c; n++)
{
string key = dataFileReader.ReadString();
string keyData = dataFileReader.ReadString();
// Not in use, removed for speed
//metaData.Add(key, keyData);
}
// for easier hit testing
float lonRanged = lon;
if (lonRanged < west)
{
lonRanged += 360; // add a revolution
}
if (lat > north || lat < south || lonRanged > east || lonRanged < west)
{
continue;
}
WorldWindPlacename pn = new WorldWindPlacename();
pn.Lat = lat;
pn.Lon = lon;
pn.Name = name;
// Not in use, removed for speed
//pn.metaData = metaData;
float elevation = 0;
if (m_parentWorld.TerrainAccessor != null && drawArgs.WorldCamera.Altitude < 300000)
{
elevation = (float)m_parentWorld.TerrainAccessor.GetElevationAt(lat, lon);
}
float altitude = (float)(m_parentWorld.EquatorialRadius + World.Settings.VerticalExaggeration * m_altitude + World.Settings.VerticalExaggeration * elevation);
pn.cartesianPoint = MathEngine.SphericalToCartesian(lat, lon, altitude);
float distanceSq = Vector3.LengthSq(pn.cartesianPoint - drawArgs.WorldCamera.Position);
if (distanceSq > m_maximumDistanceSq)
{
continue;
}
if (distanceSq < m_minimumDistanceSq)
{
continue;
}
if (!drawArgs.WorldCamera.ViewFrustum.ContainsPoint(pn.cartesianPoint))
{
continue;
}
tempPlacenames.Add(pn);
}
}
}
/// <summary>
/// Loads visible place names from one file.
/// If cache files are appropriately named only files in view are hit
/// </summary>
void UpdateNames(WorldWindWFSPlacenameFile placenameFileDescriptor, ArrayList tempPlacenames, DrawArgs drawArgs)
{
// TODO: Replace with bounding box frustum intersection test
double viewRange = drawArgs.WorldCamera.TrueViewRange.Degrees;
double north = drawArgs.WorldCamera.Latitude.Degrees + viewRange;
double south = drawArgs.WorldCamera.Latitude.Degrees - viewRange;
double west = drawArgs.WorldCamera.Longitude.Degrees - viewRange;
double east = drawArgs.WorldCamera.Longitude.Degrees + viewRange;
//TODO: Implement GML parsing
if (placenameFileDescriptor.north < south)
{
return;
}
if (placenameFileDescriptor.south > north)
{
return;
}
if (placenameFileDescriptor.east < west)
{
return;
}
if (placenameFileDescriptor.west > east)
{
return;
}
WorldWindPlacename[] tilednames = placenameFileDescriptor.PlaceNames;
if (tilednames == null)
{
return;
}
tempPlacenames.Capacity = tempPlacenames.Count + tilednames.Length;
WorldWindPlacename curPlace = new WorldWindPlacename();
for (int i = 0; i < tilednames.Length; i++)
{
if (m_placeNames != null && curPlaceNameIndex < m_placeNames.Length)
{
curPlace = m_placeNames[curPlaceNameIndex];
}
WorldWindPlacename pn = tilednames[i];
float lat = pn.Lat;
float lon = pn.Lon;
// for easier hit testing
float lonRanged = lon;
if (lonRanged < west)
{
lonRanged += 360; // add a revolution
}
if (lat > north || lat < south || lonRanged > east || lonRanged < west)
{
continue;
}
float elevation = 0;
if (m_parentWorld.TerrainAccessor != null && drawArgs.WorldCamera.Altitude < 300000)
{
elevation = (float)m_parentWorld.TerrainAccessor.GetElevationAt(lat, lon);
}
float altitude = (float)(m_parentWorld.EquatorialRadius + World.Settings.VerticalExaggeration * m_altitude + World.Settings.VerticalExaggeration * elevation);
pn.cartesianPoint = MathEngine.SphericalToCartesian(lat, lon, altitude);
float distanceSq = Vector3.LengthSq(pn.cartesianPoint - drawArgs.WorldCamera.Position);
if (distanceSq > m_maximumDistanceSq)
{
continue;
}
if (distanceSq < m_minimumDistanceSq)
{
continue;
}
if (!drawArgs.WorldCamera.ViewFrustum.ContainsPoint(pn.cartesianPoint))
{
continue;
}
tempPlacenames.Add(pn);
}
}
