void update_from_orbit(Orbit orb, double UT)
{
//calculate the position of a landing site
if (orb.ApA <= TargetAltitude)
{
AtTargetUT = orb.StartUT + (orb.ApAhead()? orb.timeToAp : 1);
}
else if (orb.PeA < TargetAltitude)
{
AtTargetUT = TrajectoryCalculator.NearestRadiusUT(orb, Body.Radius + TargetAltitude, UT);
}
else
{
AtTargetUT = orb.StartUT + orb.timeToPe;
}
TransferTime = AtTargetUT - StartUT;
AtTargetPos = orb.getRelativePositionAtUT(AtTargetUT);
AtTargetVel = orb.getOrbitalVelocityAtUT(AtTargetUT);
var at_target_rot = TrajectoryCalculator.BodyRotationAtdT(Body, -TimeToTarget);
approach = new Coordinates((at_target_rot * (AtTargetPos - AtTargetVel * 10)).xzy + Body.position, Body);
SurfacePoint = new WayPoint((at_target_rot * AtTargetPos).xzy + Body.position, Body);
SurfacePoint.Pos.SetAlt2Surface(Body);
SurfacePoint.Name = "Landing Site";
}
void update_from_orbit(Orbit orb, double UT)
{
//calculate the position of a landing site
if (orb.ApA <= TargetAltitude)
{
AtTargetUT = orb.StartUT + (orb.ApAhead()? orb.timeToAp : 1);
}
else
{
AtTargetUT = TrajectoryCalculator.NearestRadiusUT(orb, Body.Radius + TargetAltitude, UT);
}
TransferTime = AtTargetUT - StartUT;
AtTargetPos = orb.getRelativePositionAtUT(AtTargetUT);
AtTargetVel = orb.getOrbitalVelocityAtUT(AtTargetUT);
SurfacePoint = new WayPoint((TrajectoryCalculator.BodyRotationAtdT(Body, -TimeToSurface) * AtTargetPos).xzy + Body.position, Body);
SurfacePoint.Name = "Landing Site";
}