private void LoadStarsBrighterThan(SearchZone zone, LoadPosition loadPos, double limitMag, List <IStar> starsFromThisZone)
{
IntPtr buffer = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(NOMADEntry)));
try
{
using (FileStream fs = new FileStream(m_Index.GetCatalogFileForZone(loadPos.ZoneId), FileMode.Open, FileAccess.Read))
using (BinaryReader rdr = new BinaryReader(fs))
{
#if ASTROMETRY_DEBUG
Trace.Assert(fs.Length >= (loadPos.FromRecordId + 1) * 88);
#endif
uint currStarInBin = loadPos.FromRecordId - 1;
fs.Position = 88 * loadPos.FromRecordId;
for (int i = 0; i < loadPos.ToRecordId - loadPos.FromRecordId; i++)
{
currStarInBin++;
#if ASTROMETRY_DEBUG
Trace.Assert(fs.Position % 88 == 0);
#endif
fs.Seek(44, SeekOrigin.Current);
double mag = rdr.ReadInt32() / 1000.0; /* V Mag */
int byteDiff = 0;
if (mag == 30000.0)
{
mag = rdr.ReadInt32() / 1000.0; /* R Mag */
byteDiff = 4;
}
if (mag > limitMag)
{
fs.Seek(40 - byteDiff, SeekOrigin.Current);
continue;
}
fs.Seek(-(48 + byteDiff), SeekOrigin.Current);
NOMADEntry entry = new NOMADEntry();
byte[] rawData = rdr.ReadBytes(NOMADEntry.Size);
Marshal.Copy(rawData, 0, buffer, Marshal.SizeOf(entry));
entry = (NOMADEntry)Marshal.PtrToStructure(buffer, typeof(NOMADEntry));
if (entry.RAJ2000 >= zone.RAFrom &&
entry.RAJ2000 <= zone.RATo)
{
entry.InitNOMADEntry(loadPos.FirstStarNoInBin + currStarInBin, (uint)loadPos.ZoneId, currStarInBin);
starsFromThisZone.Add(entry);
}
}
}
}
finally
{
Marshal.FreeHGlobal(buffer);
}
}
private void LoadStarsBrighterThan(SearchZone zone, LoadPosition loadPos, double limitMag, List<IStar> starsFromThisZone)
{
IntPtr buffer = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(NOMADEntry)));
try
{
using (FileStream fs = new FileStream(m_Index.GetCatalogFileForZone(loadPos.ZoneId), FileMode.Open, FileAccess.Read))
using (BinaryReader rdr = new BinaryReader(fs))
{
#if ASTROMETRY_DEBUG
Trace.Assert(fs.Length >= (loadPos.FromRecordId + 1) * 88);
#endif
uint currStarInBin = loadPos.FromRecordId - 1;
fs.Position = 88 * loadPos.FromRecordId;
for (int i = 0; i < loadPos.ToRecordId - loadPos.FromRecordId; i++)
{
currStarInBin++;
#if ASTROMETRY_DEBUG
Trace.Assert(fs.Position % 88 == 0);
#endif
fs.Seek(44, SeekOrigin.Current);
double mag = rdr.ReadInt32() / 1000.0; /* V Mag */
int byteDiff = 0;
if (mag == 30000.0)
{
mag = rdr.ReadInt32() / 1000.0; /* R Mag */
byteDiff = 4;
}
if (mag > limitMag)
{
fs.Seek(40 - byteDiff, SeekOrigin.Current);
continue;
}
fs.Seek(-(48 + byteDiff), SeekOrigin.Current);
NOMADEntry entry = new NOMADEntry();
byte[] rawData = rdr.ReadBytes(NOMADEntry.Size);
Marshal.Copy(rawData, 0, buffer, Marshal.SizeOf(entry));
entry = (NOMADEntry)Marshal.PtrToStructure(buffer, typeof(NOMADEntry));
if (entry.RAJ2000 >= zone.RAFrom &&
entry.RAJ2000 <= zone.RATo)
{
entry.InitNOMADEntry(loadPos.FirstStarNoInBin + currStarInBin, (uint)loadPos.ZoneId, currStarInBin);
starsFromThisZone.Add(entry);
}
}
}
}
finally
{
Marshal.FreeHGlobal(buffer);
}
}