private static void MakeEclipticText()
{
int year = SpaceTimeController.Now.GetUTCFullYear();
if (EclipOvTextBatch == null)
{
EclipOvTextBatch = new Text3dBatch(80);
EclipticTextYear = year;
double obliquity = Coordinates.MeanObliquityOfEcliptic(SpaceTimeController.JNow);
Matrix3d mat = Matrix3d.RotationX((-obliquity / 360.0 * (Math.PI * 2)));
double daysPerYear = 365.25;
if (DT.IsLeap(year, true))
{
monthDays[1] = 29;
daysPerYear = 366;
}
else
{
monthDays[1] = 28;
daysPerYear = 365;
}
int count = 2 * (int)daysPerYear;
EclipticCount = (int)daysPerYear;
double jYear = SpaceTimeController.UtcToJulian(new Date(year, 0, 1, 12, 0, 0));
int index = 0;
double d = 0;
for (int m = 0; m < 12; m++)
{
int daysThisMonth = (int)monthDays[m];
for (int i = 0; i < daysThisMonth; i++)
{
AstroRaDec sunRaDec = Planets.GetPlanetLocationJD("Sun", jYear);
COR sunEcliptic = CT.Eq2Ec(sunRaDec.RA, sunRaDec.Dec, obliquity);
d = sunEcliptic.X;
double dd = d;// +180;
if (i == Math.Floor(daysThisMonth / 2.0))
{
Vector3d center = Vector3d.TransformCoordinate(Vector3d.Create((Math.Cos((dd * Math.PI * 2.0) / 360)),
.025f,
(Math.Sin((dd * Math.PI * 2.0) / 360))), mat);
Vector3d up = Vector3d.TransformCoordinate(Vector3d.Create((Math.Cos((dd * Math.PI * 2.0) / 360)),
.045f,
(Math.Sin((dd * Math.PI * 2.0) / 360))), mat);
up.Subtract(center);
up.Normalize();
EclipOvTextBatch.Add(new Text3d(center, up, monthNames[m], 80, .000159375));
}
index++;
index++;
jYear += 1;
}
d += monthDays[m];
}
}
}
public static bool DrawEcliptic(RenderContext renderContext, float opacity, Color drawColor)
{
Color col = drawColor;
int year = SpaceTimeController.Now.GetUTCFullYear();
if (eclipticOverviewLineList == null || year != EclipticYear)
{
if (eclipticOverviewLineList != null)
{
eclipticOverviewLineList.Clear();
eclipticOverviewLineList = null;
}
EclipticYear = year;
double obliquity = Coordinates.MeanObliquityOfEcliptic(SpaceTimeController.JNow);
Matrix3d mat = Matrix3d.RotationX((-obliquity / 360.0 * (Math.PI * 2)));
double daysPerYear = 365.25;
if (DT.IsLeap(year, true))
{
monthDays[1] = 29;
daysPerYear = 366;
}
else
{
monthDays[1] = 28;
daysPerYear = 365;
}
int count = 2 * (int)daysPerYear;
EclipticCount = (int)daysPerYear;
double jYear = SpaceTimeController.UtcToJulian(new Date(year, 0, 1, 12, 0, 0));
int index = 0;
double d = 0;
eclipticOverviewLineList = new SimpleLineList();
eclipticOverviewLineList.DepthBuffered = false;
for (int m = 0; m < 12; m++)
{
int daysThisMonth = (int)monthDays[m];
for (int i = 0; i < daysThisMonth; i++)
{
AstroRaDec sunRaDec = Planets.GetPlanetLocationJD("Sun", jYear);
COR sunEcliptic = CT.Eq2Ec(sunRaDec.RA, sunRaDec.Dec, obliquity);
d = sunEcliptic.X;
double width = .005f;
if (i == 0)
{
width = .01f;
}
double dd = d;// +180;
eclipticOverviewLineList.AddLine(
Vector3d.TransformCoordinate(Vector3d.Create((Math.Cos((dd * Math.PI * 2.0) / 360)),
width,
(Math.Sin((dd * Math.PI * 2.0) / 360))), mat),
Vector3d.TransformCoordinate(Vector3d.Create((Math.Cos((dd * Math.PI * 2.0) / 360)),
-width,
(Math.Sin((dd * Math.PI * 2.0) / 360))), mat)
);
index++;
jYear += 1;
}
d += monthDays[m];
}
}
eclipticOverviewLineList.DrawLines(renderContext, opacity, drawColor);
return(true);
}
