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); }