public static Vector3d GetPlanet3dLocationJD(SolarSystemObjects target, double jNow)
{
try
{
Vector3d result = new Vector3d();
AstroRaDec centerRaDec = AstroCalc.GetPlanet(jNow, 0, 0, 0, -6378149);
Vector3d center = (Vector3d)Coordinates.RADecTo3dAu(centerRaDec.RA, centerRaDec.Dec, centerRaDec.Distance);
if (target == SolarSystemObjects.Earth)
{
result = Vector3d.Create(-center.X, -center.Y, -center.Z);
}
else
{
AstroRaDec planet = AstroCalc.GetPlanet(jNow, (EO)(int)target, 0, 0, -6378149);
result = (Vector3d)Coordinates.RADecTo3dAu(planet.RA, planet.Dec, planet.Distance);
result.Subtract(center);
}
result.RotateX(Coordinates.MeanObliquityOfEcliptic(jNow) * RC);
if (Settings.Active.SolarSystemScale != 1)
{
switch (target)
{
case SolarSystemObjects.Moon:
{
Vector3d parent = (Vector3d)GetPlanet3dLocationJD(SolarSystemObjects.Earth, jNow);
// Parent Centric
result.Subtract(parent);
result.Multiply(Settings.Active.SolarSystemScale / 2);
result.Add(parent);
}
break;
case SolarSystemObjects.Io:
case SolarSystemObjects.Europa:
case SolarSystemObjects.Ganymede:
case SolarSystemObjects.Callisto:
{
Vector3d parent = (Vector3d)GetPlanet3dLocationJD(SolarSystemObjects.Jupiter, jNow);
// Parent Centric
result.Subtract(parent);
result.Multiply(Settings.Active.SolarSystemScale);
result.Add(parent);
}
break;
default:
break;
}
}
return (Vector3d)result;
}
catch
{
return Vector3d.Create(0, 0, 0);
}
}
void InitLineBuffer(RenderContext renderContext)
{
if (renderContext.gl != null)
{
if (lineBuffers.Count == 0)
{
int count = linePoints.Count;
PositionVertexBuffer lineBuffer = null;
Vector3d[] linePointList = null;
localCenter = new Vector3d();
if (DepthBuffered)
{
// compute the local center..
foreach (Vector3d point in linePoints)
{
localCenter.Add(point);
}
localCenter.X /= count;
localCenter.Y /= count;
localCenter.Z /= count;
}
int countLeft = count;
int index = 0;
int counter = 0;
Vector3d temp;
foreach (Vector3d point in linePoints)
{
if (counter >= 100000 || linePointList == null)
{
if (lineBuffer != null)
{
lineBuffer.Unlock();
}
int thisCount = Math.Min(100000, countLeft);
countLeft -= thisCount;
lineBuffer = new PositionVertexBuffer(thisCount);
linePointList = (Vector3d[])lineBuffer.Lock(); // Lock the buffer (which will return our structs)
lineBuffers.Add(lineBuffer);
lineBufferCounts.Add(thisCount);
counter = 0;
}
if (UseLocalCenters)
{
temp = Vector3d.SubtractVectors(point, localCenter);
linePointList[counter] = temp;
}
else
{
linePointList[counter] = point;
}
index++;
counter++;
}
if (lineBuffer != null)
{
lineBuffer.Unlock();
}
}
}
}
