public void updatePotentialEncounters(GravityElementsClass newManeuver)
{
foreach (Encounter encounter in encounters.maneuverEncounters)
{
Destroy(encounter.PerigeeIcon.poiIcon);
}
encounters.maneuverEncounters.Clear();
//initial setup
GameObject tempPerigeeIcon = Instantiate(perigeeIcon);
OrbitalPOI perigeePOI = new OrbitalPOI(tempPerigeeIcon, newManeuver.Perigee);
Encounter currentEncounter = new Encounter(newManeuver, newManeuver.TrueAnomaly, double.PositiveInfinity, 0, perigeePOI);
iterations = 0;
predictAnEncounter(currentEncounter, ref encounters.maneuverEncounters);
}
//Finds all encounters within one orbit of the craft
public void updateEncounters()
{
foreach (Encounter encounter in encounters.predictedEncounters)
{
Destroy(encounter.PerigeeIcon.poiIcon);
}
encounters.predictedEncounters.Clear();
//initial setup
GravityElementsClass currentShipsGravityElements = shipElements.getClassVersion();
double startingTrueAnomaly = shipElements.TrueAnomaly;
GameObject tempPerigeeIcon = Instantiate(perigeeIcon);
OrbitalPOI perigeePOI = new OrbitalPOI(tempPerigeeIcon, currentShipsGravityElements.Perigee);
Encounter currentEncounter = new Encounter(currentShipsGravityElements, startingTrueAnomaly, double.PositiveInfinity, 0, perigeePOI);
iterations = 0;
predictAnEncounter(currentEncounter, ref encounters.predictedEncounters);
instantiatePOIs(encounters.predictedEncounters);
}
public Encounter(GravityElementsClass gravElements, double startingTrueAnomaly, double endingTrueAnomaly, double timeOfEncounter, OrbitalPOI perigeeIcon)
{
this.gravElements = gravElements;
this.startingTrueAnomaly = startingTrueAnomaly;
this.endingTrueAnomaly = endingTrueAnomaly;
this.timeOfEncounter = timeOfEncounter;
this.perigeeIcon = perigeeIcon;
}
//Takes in the ships current gravity elements according to its last encounter, current massive body elements as they are at tiem 0 and current massivebodyelements as they are at time 0
private void predictAnEncounter(Encounter currentEncounter, ref List <Encounter> encounters)
{
encounters.Add(currentEncounter);
//data sources
MassiveBodyElements currentMassiveBody = currentEncounter.GravElements.massiveBody.GetComponent <MassiveBodyElements>();
GravityElementsClass currentMassiveBodyGravElements = currentEncounter.GravElements.massiveBody.GetComponent <GravityElements>().getClassVersion();
iterations++;
double time = 0;
double currentOrbitalPeriod = calculatePeriod(currentEncounter.GravElements.OrbitType, currentEncounter.GravElements.SemiMajorAxis, currentEncounter.GravElements.Mu);
bool foundNewEncounter = false;
GameObject encounteredMassiveBody = null;
while (time < currentOrbitalPeriod && !foundNewEncounter)
{
time += 0.01;
//have we exited the current soi?
double altitude = currentEncounter.GravElements.calculateLocalPositionAtFutureTime(time).magnitude; //the ships massive body is always at time 0
if (currentMassiveBody.SphereOfInfluence < altitude)
{
foundNewEncounter = true;
encounteredMassiveBody = currentEncounter.GravElements.massiveBody.GetComponent <GravityElements>().massiveBody;
break;
}
//have we entered a new soi?
foreach (GameObject satelite in currentMassiveBody.satelites)
{
double sateliteSphereOfInfluence = satelite.GetComponent <MassiveBodyElements>().SphereOfInfluence;
Vector2 sateliteLocalPosition = satelite.GetComponent <GravityElements>().calculateLocalPositionAtFutureTime(time + currentEncounter.TimeOfEncounter);
Vector2 shipsLocalPosition = currentEncounter.GravElements.calculateLocalPositionAtFutureTime(time);
if (Vector2.Distance(shipsLocalPosition, sateliteLocalPosition) < sateliteSphereOfInfluence)
{
foundNewEncounter = true;
encounteredMassiveBody = satelite;
break;
}
}
if (time > 100) //hyperbolic orbit with infinite periode, this prevents infinite loops
{
break;
}
}
//We have encountered nothing, just a regular eliptical orbit, or a hyperbolic one that's really long
if (encounteredMassiveBody == null)
{
return;
}
//We have encountered a massive body, time to assemble a new encounter
Tuple <Vector2, Vector2> returnInfo;
returnInfo = currentEncounter.GravElements.calculateLocalPositionAndVelocityAtFutureTime(time);
Vector2 shipPredictedLocalPosition = returnInfo.item1;
Vector2 shipPredictedLocalVelocity = returnInfo.item2;
returnInfo = currentMassiveBodyGravElements.calculateGlobalPositionAndVelocityAtFutureTime(time + currentEncounter.TimeOfEncounter);
Vector2 currentMassiveBodyPredictedGlobalPosition = returnInfo.item1;
Vector2 currentMassiveBodyPredictedGlobalVelocity = returnInfo.item2;
returnInfo = encounteredMassiveBody.GetComponent <GravityElements>().calculateGlobalPositionAndVelocityAtFutureTime(time + currentEncounter.TimeOfEncounter);
Vector2 encounteredMassiveBodyPredictedGlobalPosition = returnInfo.item1;
Vector2 encounteredmassiveBodyPredictedGlobalVelocity = returnInfo.item2;
Vector2 shipPositionRelativeToEncounter = (shipPredictedLocalPosition + currentMassiveBodyPredictedGlobalPosition) - encounteredMassiveBodyPredictedGlobalPosition;
Vector2 shipVelocityRelativeToEncounter = (shipPredictedLocalVelocity + currentMassiveBodyPredictedGlobalVelocity) - encounteredmassiveBodyPredictedGlobalVelocity;
GravityElementsClass newShipsGravityElements = calculateInitialOrbitalElements(shipPositionRelativeToEncounter, shipVelocityRelativeToEncounter, encounteredMassiveBody); //massive body is inputed in its state at time 0
//Change the ending true anomaly of the last encounter
double startingTrueAnomaly = newShipsGravityElements.TrueAnomaly;
double endingTrueAnomaly = MiscHelperFuncs.AngleBetweenVector2(currentEncounter.GravElements.Eccentricity, shipPredictedLocalPosition);
encounters[encounters.Count - 1].EndingTrueAnomaly = endingTrueAnomaly;
if (iterations < MAX_ITERATIONS)
{
GameObject tempPerigeeIcon = Instantiate(perigeeIcon);
OrbitalPOI perigeePOI = new OrbitalPOI(tempPerigeeIcon, newShipsGravityElements.Perigee);
Encounter newEncounter = new Encounter(newShipsGravityElements, startingTrueAnomaly, double.PositiveInfinity, time + currentEncounter.TimeOfEncounter, perigeePOI);
predictAnEncounter(newEncounter, ref encounters);
}
}
