public static void InitStarVertexBuffer(RenderContext renderContext)
{
if (!starsDownloading)
{
GetStarFile("http://www.worldwidetelescope.org/wwtweb/catalog.aspx?Q=hipparcos");
starsDownloading = true;
}
if (starSprites == null && starCount > 0)
{
double ecliptic = Coordinates.MeanObliquityOfEcliptic(SpaceTimeController.JNow) / 180.0 * Math.PI;
int count = stars.Count;
starCount = count;
starSprites = new PointList(renderContext);
starSprites.DepthBuffered = false;
foreach (Star star in stars)
{
Vector3d pos = Coordinates.RADecTo3dAu(star.RA, star.Dec, star.Distance);
pos.RotateX(ecliptic);
star.Position = pos;
double radDec = (1200000) / Math.Pow(1.6, star.AbsoluteMagnitude);
starSprites.AddPoint(pos, star.Col, new Dates(0, 1), (float)radDec * 100);
}
}
}
