private void LoadStars(SearchZone zone, double limitMag, List <IStar> starsFromThisZone)
{
List <LoadPosition> searchIndexes = m_Index.GetLoadPositions(zone);
IntPtr buffer = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(UCAC2Entry)));
try
{
foreach (LoadPosition pos in searchIndexes)
{
string fileName;
if (pos.BSS)
{
fileName = Path.Combine(m_CatalogLocation, string.Format("s{0}", pos.ZoneId.ToString("00")));
}
else
{
fileName = Path.Combine(m_CatalogLocation, string.Format("z{0}", pos.ZoneId.ToString("000")));
}
long positionFrom = (pos.FromRecordId - 1) * UCAC2Entry.Size;
uint firstStarNoToRead = pos.FirstStarNoInBin + pos.FromRecordId;
uint numRecords = pos.ToRecordId - pos.FromRecordId;
using (FileStream str = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.Read))
{
using (BinaryReader rdr = new BinaryReader(str))
{
rdr.BaseStream.Position = positionFrom;
for (int i = 0; i < numRecords; i++, firstStarNoToRead++)
{
UCAC2Entry entry = new UCAC2Entry();
byte[] rawData = rdr.ReadBytes(UCAC2Entry.Size);
Marshal.Copy(rawData, 0, buffer, Marshal.SizeOf(entry));
entry = (UCAC2Entry)Marshal.PtrToStructure(buffer, typeof(UCAC2Entry));
if (pos.BSS)
{
entry.InitUCAC2Entry(firstStarNoToRead + UCAC2Entry.FIRST_BSS_STAR_NO);
}
else
{
entry.InitUCAC2Entry(firstStarNoToRead);
}
if (entry.Mag > limitMag)
{
continue;
}
if (entry.RAJ2000 < zone.RAFrom)
{
continue;
}
if (entry.RAJ2000 > zone.RATo)
{
continue;
}
if (entry.DEJ2000 < zone.DEFrom)
{
continue;
}
if (entry.DEJ2000 > zone.DETo)
{
continue;
}
starsFromThisZone.Add(entry);
}
}
}
}
}
finally
{
Marshal.FreeHGlobal(buffer);
}
}
private void LoadStars(SearchZone zone, double limitMag, List<IStar> starsFromThisZone)
{
List<LoadPosition> searchIndexes = m_Index.GetLoadPositions(zone);
IntPtr buffer = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(UCAC2Entry)));
try
{
foreach(LoadPosition pos in searchIndexes)
{
string fileName;
if (pos.BSS)
fileName = Path.Combine(m_CatalogLocation, string.Format("s{0}", pos.ZoneId.ToString("00")));
else
fileName = Path.Combine(m_CatalogLocation, string.Format("z{0}", pos.ZoneId.ToString("000")));
long positionFrom = (pos.FromRecordId - 1)* UCAC2Entry.Size;
uint firstStarNoToRead = pos.FirstStarNoInBin + pos.FromRecordId;
uint numRecords = pos.ToRecordId - pos.FromRecordId;
using (FileStream str = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.Read))
{
using (BinaryReader rdr = new BinaryReader(str))
{
rdr.BaseStream.Position = positionFrom;
for (int i = 0; i < numRecords; i++, firstStarNoToRead++)
{
UCAC2Entry entry = new UCAC2Entry();
byte[] rawData = rdr.ReadBytes(UCAC2Entry.Size);
Marshal.Copy(rawData, 0, buffer, Marshal.SizeOf(entry));
entry = (UCAC2Entry)Marshal.PtrToStructure(buffer, typeof(UCAC2Entry));
if (pos.BSS)
entry.InitUCAC2Entry(firstStarNoToRead + UCAC2Entry.FIRST_BSS_STAR_NO);
else
entry.InitUCAC2Entry(firstStarNoToRead);
if (entry.Mag > limitMag) continue;
if (entry.RAJ2000 < zone.RAFrom) continue;
if (entry.RAJ2000 > zone.RATo) continue;
if (entry.DEJ2000 < zone.DEFrom) continue;
if (entry.DEJ2000 > zone.DETo) continue;
starsFromThisZone.Add(entry);
}
}
}
}
}
finally
{
Marshal.FreeHGlobal(buffer);
}
}
