/// <summary>
/// Updates the physics bodies and resolves all forces.
/// </summary>
private void Update(TimeStep timeStep)
{
ResolveMassiveBodyParents();
_spaceCraftManager.ResolveGravitionalParents(_massiveBodies);
AdjustSpeedForBurns(timeStep);
double targetDt = _isPaused ? 0 : timeStep.Dt;
// Update all bodies according to the timestep
for (int i = 0; i < timeStep.UpdateLoops; i++)
{
// Resolve n body massive body forces
foreach (IMassiveBody bodyA in _massiveBodies)
{
bodyA.ResetAccelerations();
foreach (IMassiveBody bodyB in _massiveBodies)
{
if (bodyA == bodyB)
{
continue;
}
bodyA.ResolveGravitation(bodyB);
}
}
_spaceCraftManager.ResolveForces(_massiveBodies);
_spaceCraftManager.Update(timeStep, targetDt);
// Update bodies
foreach (IGravitationalBody gravitationalBody in _gravitationalBodies)
{
gravitationalBody.Update(targetDt);
}
_totalElapsedSeconds += targetDt;
}
_camera.Update(TimeStep.RealTimeDt);
_eventManager.Update(TimeStep.RealTimeDt);
// Fixed update all gravitational bodies
foreach (IGravitationalBody body in _gravitationalBodies)
{
body.FixedUpdate(timeStep);
}
var targetSpaceCraft = _gravitationalBodies[_targetIndex] as ISpaceCraft;
if (targetSpaceCraft != null)
{
if (targetSpaceCraft.Controller.IsPrograde)
{
_progradeButton.Enable();
}
else
{
_progradeButton.Disable();
}
if (targetSpaceCraft.Controller.IsRetrograde)
{
_retrogradeButton.Enable();
}
else
{
_retrogradeButton.Disable();
}
}
_scrollRate = MathHelper.Lerp(_scrollRate, _targetScrollRate, 0.1f);
_targetScrollRate = MathHelper.Lerp(_targetScrollRate, 0, 0.1f);
if (_camera.Zoom > 1)
{
double scroll = Math.Pow(_camera.Zoom, 1.05f) * _scrollRate;
_camera.ChangeZoom(scroll);
}
else
{
_camera.ChangeZoom(_scrollRate);
}
SetCameraRotation();
}
private void LoadSolarSystem()
{
_sun = new Sun();
var mercury = new Mercury();
var venus = new Venus();
var earth = new Earth();
var moon = new Moon(earth.Position, earth.Velocity);
var mars = new Mars();
var jupiter = new Jupiter();
var callisto = new Callisto(jupiter.Position, jupiter.Velocity);
var europa = new Europa(jupiter.Position, jupiter.Velocity);
var ganymede = new Ganymede(jupiter.Position, jupiter.Velocity);
var io = new Io(jupiter.Position, jupiter.Velocity);
var saturn = new Saturn();
_massiveBodies = new List <IMassiveBody>
{
_sun, mercury, venus, earth, moon, mars, jupiter, callisto, europa, ganymede, io, saturn
};
ResolveMassiveBodyParents();
_gravitationalBodies = new List <IGravitationalBody>
{
_sun, mercury, venus, earth, moon, mars, jupiter, callisto, europa, ganymede, io, saturn
};
_spaceCraftManager = new SpaceCraftManager(_gravitationalBodies);
_structures = new List <StructureBase>();
MissionConfig primaryMission = MissionConfig.Load(ProfilePaths[0]);
_originTime = primaryMission.GetLaunchDate();
UpdateLoadingPercentage(20);
OrbitHelper.SimulateToTime(_massiveBodies, _originTime, 300, UpdateLoadingPercentage);
UpdateLoadingPercentage(80);
// Load missions
for (int i = 0; i < ProfilePaths.Count; i++)
{
MissionConfig missionConfig = MissionConfig.Load(ProfilePaths[i]);
if (missionConfig.ClockDelay > _clockDelay)
{
_clockDelay = missionConfig.ClockDelay;
}
IMassiveBody targetPlanet = LocatePlanet(missionConfig.ParentPlanet);
// Get the launch angle relative to the sun for the given time at the origin
// and offset each vehicle by a certain amount on the surface
double launchAngle = targetPlanet.GetSurfaceAngle(_originTime, _sun) + i * 0.00002;
_spaceCraftManager.Add(SpacecraftFactory.BuildSpaceCraft(targetPlanet, launchAngle, missionConfig, ProfilePaths[i]));
_structures.AddRange(StructureFactory.Load(targetPlanet, launchAngle, ProfilePaths[i]));
}
_spaceCraftManager.Initialize(_eventManager, _clockDelay);
// Target the spacecraft
_targetIndex = _gravitationalBodies.IndexOf(_spaceCraftManager.First);
_spaceCraftManager.ResolveGravitionalParents(_massiveBodies);
UpdateLoadingPercentage(90);
}
