/// <summary>
/// Calculates the velocities of this vessel at some future universal timestamp,
/// taking into account all currently predicted SOI transition patches, and also
/// assuming that all the planned maneuver nodes will actually be executed precisely
/// as planned. Note that this cannot "see" into the future any farther than the
/// KSP orbit patches setting allows for.
/// </summary>
/// <param name="timeStamp">The time to predict for. Although the intention is to
/// predict for a future time, it could be used to predict for a past time.</param>
/// <returns>The orbit/surface velocity pair as a user-readable Vector in raw rotation coordinates.</returns>
override public OrbitableVelocity GetVelocitiesAtUT(TimeSpan timeStamp)
{
string blockingTech;
if (!Career.CanMakeNodes(out blockingTech))
{
throw new KOSLowTechException("use VELOCITYAT on a vessel", blockingTech);
}
double desiredUT = timeStamp.ToUnixStyleTime();
Orbit patch = GetOrbitAtUT(desiredUT);
Vector3d orbVel = patch.getOrbitalVelocityAtUT(desiredUT);
// This is an ugly workaround to fix what is probably a bug in KSP's API:
// If looking at a future orbit patch around a child body of the current body, then
// the various get{Thingy}AtUT() methods return numbers calculated incorrectly as
// if the child body was going to remain stationary where it is now, rather than
// taking into account where it will be later when the intercept happens.
// This corrects for that case:
if (Utils.BodyOrbitsBody(patch.referenceBody, Vessel.orbit.referenceBody))
{
Vector3d futureBodyVel = patch.referenceBody.orbit.getOrbitalVelocityAtUT(desiredUT);
orbVel = orbVel + futureBodyVel;
}
// For some weird reason orbital velocities are returned by the KSP API
// with Y and Z swapped, so swap them back:
orbVel = new Vector3d(orbVel.x, orbVel.z, orbVel.y);
CelestialBody parent = patch.referenceBody;
Vector surfVel;
if (parent != null)
{
Vector3d pos = GetPositionAtUT(timeStamp);
surfVel = new Vector(orbVel - parent.getRFrmVel(pos + Shared.Vessel.findWorldCenterOfMass()));
}
else
{
surfVel = new Vector(orbVel.x, orbVel.y, orbVel.z);
}
return(new OrbitableVelocity(new Vector(orbVel), surfVel));
}
private ListValue BuildPatchList()
{
var list = new ListValue();
var orb = Orbit;
int index = 0;
int highestAllowedIndex = Career.PatchLimit();
while (index <= highestAllowedIndex)
{
if (orb == null || (!orb.activePatch))
{
break;
}
list.Add(new OrbitInfo(orb, Shared));
orb = orb.nextPatch;
++index;
}
return(list);
}
public void Remove()
{
if (nodeRef == null)
{
return;
}
string careerReason;
if (!Career.CanMakeNodes(out careerReason))
{
throw new KOSLowTechException("use maneuver nodes", careerReason);
}
nodeLookup.Remove(nodeRef);
vesselRef.patchedConicSolver.RemoveManeuverNode(nodeRef);
nodeRef = null;
vesselRef = null;
}
public void AddToVessel(Vessel v)
{
if (nodeRef != null)
{
throw new Exception("Node has already been added");
}
string careerReason;
if (!Career.CanMakeNodes(out careerReason))
{
throw new KOSLowTechException("use maneuver nodes", careerReason);
}
vesselRef = v;
nodeRef = v.patchedConicSolver.AddManeuverNode(time);
UpdateNodeDeltaV();
v.patchedConicSolver.UpdateFlightPlan();
nodeLookup.Add(nodeRef, this);
}
public override void Execute(SharedObjects shared)
{
AssertArgBottomAndConsume(shared); // no args
ReturnValue = new Career();
}