public ICollection <CelestialObject> Search(SkyContext c, string searchString, Func <CelestialObject, bool> filterFunc, int maxCount = 50)
{
var match = searchRegex.Match(searchString.ToLowerInvariant());
if (match.Success)
{
int tyc1 = int.Parse(match.Groups["tyc1"].Value);
short? tyc2 = match.Groups["tyc2"].Success ? short.Parse(match.Groups["tyc2"].Value) : (short?)null;
string tyc3 = match.Groups["tyc3"].Value;
if (tyc1 > 0 && tyc1 <= 9537)
{
Tycho2Region region = IndexRegions.ElementAt(tyc1 - 1);
var stars = GetStarsInRegion(region, c, tyc2, tyc3);
return(stars.Where(filterFunc).Take(maxCount).ToArray());
}
}
return(new CelestialObject[0]);
}
public ICollection <SearchResultItem> Search(SkyContext c, string searchString, int maxCount = 50)
{
var match = searchRegex.Match(searchString.ToLowerInvariant());
if (match.Success)
{
int tyc1 = int.Parse(match.Groups["tyc1"].Value);
short? tyc2 = match.Groups["tyc2"].Success ? short.Parse(match.Groups["tyc2"].Value) : (short?)null;
string tyc3 = match.Groups["tyc3"].Value;
if (tyc1 > 0 && tyc1 <= 9537)
{
Tycho2Region region = IndexRegions.ElementAt(tyc1 - 1);
var stars = GetStarsInRegion(region, c, tyc2, tyc3);
return(stars.Take(maxCount).Select(s => new SearchResultItem(s, s.ToString())).ToList());
}
}
return(new List <SearchResultItem>());
}
private ICollection <Tycho2Star> GetStarsInRegion(Tycho2Region region, SkyContext c, short?tyc2, string tyc3)
{
// seek reading position
CatalogReader.BaseStream.Seek(CATALOG_RECORD_LEN * (region.FirstStarId - 1), SeekOrigin.Begin);
// count of records in current region
int count = (int)(region.LastStarId - region.FirstStarId);
// read region in memory for fast access
byte[] buffer = CatalogReader.ReadBytes(CATALOG_RECORD_LEN * count);
var stars = new List <Tycho2Star>();
for (int i = 0; i < count && stars.Count < 50; i++)
{
Tycho2Star star = GetStar(c, buffer, i * CATALOG_RECORD_LEN, tyc2, tyc3);
if (star != null)
{
stars.Add(star);
}
}
return(stars);
}
private ICollection <Tycho2Star> GetStarsInRegion(SkyContext c, Tycho2Region region, CrdsEquatorial eq, double angle, Func <float, bool> magFilter)
{
// seek reading position
CatalogReader.BaseStream.Seek(CATALOG_RECORD_LEN * (region.FirstStarId - 1), SeekOrigin.Begin);
// count of records in current region
int count = (int)(region.LastStarId - region.FirstStarId);
// read region in memory for fast access
byte[] buffer = CatalogReader.ReadBytes(CATALOG_RECORD_LEN * count);
var stars = new List <Tycho2Star>();
for (int i = 0; i < count; i++)
{
Tycho2Star star = GetStar(c, buffer, i * CATALOG_RECORD_LEN, eq, angle, magFilter);
if (star != null)
{
stars.Add(star);
}
}
return(stars);
}