// This function runs the simulation and returns a newly created array of Stage objects
public Stage[] RunSimulation()
{
if (SimManager.logOutput)
{
MonoBehaviour.print("RunSimulation started");
}
this._timer.Start();
LogMsg log = null;
if (SimManager.logOutput)
{
log = new LogMsg();
}
// Start with the last stage to simulate
// (this is in a member variable so it can be accessed by AllowedToStage and ActivateStage)
this.currentStage = this.lastStage;
// Work out which engines would be active if just doing the staging and if this is different to the
// currently active engines then generate an extra stage
// Loop through all the engines
bool anyActive = false;
for (int i = 0; i < this.allEngines.Count; i++)
{
EngineSim engine = this.allEngines[i];
if (log != null)
{
log.buf.AppendLine("Testing engine mod of " + engine.partSim.name + ":" + engine.partSim.partId);
}
bool bActive = engine.isActive;
bool bStage = (engine.partSim.inverseStage >= this.currentStage);
if (log != null)
{
log.buf.AppendLine("bActive = " + bActive + " bStage = " + bStage);
}
if (HighLogic.LoadedSceneIsFlight)
{
if (bActive)
{
anyActive = true;
}
if (bActive != bStage)
{
// If the active state is different to the state due to staging
if (log != null)
{
log.buf.AppendLine("Need to do current active engines first");
}
this.doingCurrent = true;
}
}
else
{
if (bStage)
{
if (log != null)
{
log.buf.AppendLine("Marking as active");
}
engine.isActive = true;
}
}
}
// If we need to do current because of difference in engine activation and there actually are active engines
// then we do the extra stage otherwise activate the next stage and don't treat it as current
if (this.doingCurrent && anyActive)
{
this.currentStage++;
}
else
{
this.ActivateStage();
this.doingCurrent = false;
}
// Create a list of lists of PartSims that prevent decoupling
this.BuildDontStageLists(log);
if (log != null)
{
log.Flush();
}
// Create the array of stages that will be returned
Stage[] stages = new Stage[this.currentStage + 1];
// Loop through the stages
while (this.currentStage >= 0)
{
if (log != null)
{
log.buf.AppendLine("Simulating stage " + this.currentStage);
log.buf.AppendLine("ShipMass = " + this.ShipMass);
log.Flush();
this._timer.Reset();
this._timer.Start();
}
// Update active engines and resource drains
this.UpdateResourceDrains();
// Create the Stage object for this stage
Stage stage = new Stage();
this.stageTime = 0d;
this.vecStageDeltaV = Vector3.zero;
this.stageStartMass = this.ShipMass;
this.stageStartCom = this.ShipCom;
this.stepStartMass = this.stageStartMass;
this.stepEndMass = 0;
this.CalculateThrustAndISP();
// Store various things in the Stage object
stage.thrust = this.totalStageThrust;
//MonoBehaviour.print("stage.thrust = " + stage.thrust);
stage.thrustToWeight = this.totalStageThrust / (this.stageStartMass * this.gravity);
stage.maxThrustToWeight = stage.thrustToWeight;
//MonoBehaviour.print("StageMass = " + stageStartMass);
//MonoBehaviour.print("Initial maxTWR = " + stage.maxThrustToWeight);
stage.actualThrust = this.totalStageActualThrust;
stage.actualThrustToWeight = this.totalStageActualThrust / (this.stageStartMass * this.gravity);
// calculate torque and associates
stage.maxThrustTorque = this.totalStageThrustForce.TorqueAt(this.stageStartCom).magnitude;
// torque divided by thrust. imagine that all engines are at the end of a lever that tries to turn the ship.
// this numerical value, in meters, would represent the length of that lever.
double torqueLeverArmLength = (stage.thrust <= 0) ? 0 : stage.maxThrustTorque / stage.thrust;
// how far away are the engines from the CoM, actually?
double thrustDistance = (this.stageStartCom - this.totalStageThrustForce.GetAverageForceApplicationPoint()).magnitude;
// the combination of the above two values gives an approximation of the offset angle.
double sinThrustOffsetAngle = 0;
if (thrustDistance > 1e-7)
{
sinThrustOffsetAngle = torqueLeverArmLength / thrustDistance;
if (sinThrustOffsetAngle > 1)
{
sinThrustOffsetAngle = 1;
}
}
stage.thrustOffsetAngle = Math.Asin(sinThrustOffsetAngle) * 180 / Math.PI;
// Calculate the cost and mass of this stage and add all engines and tanks that are decoupled
// in the next stage to the dontStageParts list
for (int i = 0; i < this.allParts.Count; i++)
{
PartSim partSim = this.allParts[i];
if (partSim.decoupledInStage == this.currentStage - 1)
{
stage.cost += partSim.cost;
stage.mass += partSim.GetStartMass();
}
}
this.dontStageParts = dontStagePartsLists[this.currentStage];
if (log != null)
{
log.buf.AppendLine("Stage setup took " + this._timer.ElapsedMilliseconds + "ms");
if (this.dontStageParts.Count > 0)
{
log.buf.AppendLine("Parts preventing staging:");
for (int i = 0; i < this.dontStageParts.Count; i++)
{
PartSim partSim = this.dontStageParts[i];
partSim.DumpPartToBuffer(log.buf, "");
}
}
else
{
log.buf.AppendLine("No parts preventing staging");
}
log.Flush();
}
// Now we will loop until we are allowed to stage
int loopCounter = 0;
while (!this.AllowedToStage())
{
loopCounter++;
//MonoBehaviour.print("loop = " + loopCounter);
// Calculate how long each draining tank will take to drain and run for the minimum time
double resourceDrainTime = double.MaxValue;
PartSim partMinDrain = null;
foreach (PartSim partSim in this.drainingParts)
{
double time = partSim.TimeToDrainResource();
if (time < resourceDrainTime)
{
resourceDrainTime = time;
partMinDrain = partSim;
}
}
if (log != null)
{
MonoBehaviour.print("Drain time = " + resourceDrainTime + " (" + partMinDrain.name + ":" + partMinDrain.partId + ")");
}
foreach (PartSim partSim in this.drainingParts)
{
partSim.DrainResources(resourceDrainTime);
}
// Get the mass after draining
this.stepEndMass = this.ShipMass;
this.stageTime += resourceDrainTime;
double stepEndTWR = this.totalStageThrust / (this.stepEndMass * this.gravity);
//MonoBehaviour.print("After drain mass = " + stepEndMass);
//MonoBehaviour.print("currentThrust = " + totalStageThrust);
//MonoBehaviour.print("currentTWR = " + stepEndTWR);
if (stepEndTWR > stage.maxThrustToWeight)
{
stage.maxThrustToWeight = stepEndTWR;
}
//MonoBehaviour.print("newMaxTWR = " + stage.maxThrustToWeight);
// If we have drained anything and the masses make sense then add this step's deltaV to the stage total
if (resourceDrainTime > 0d && this.stepStartMass > this.stepEndMass && this.stepStartMass > 0d && this.stepEndMass > 0d)
{
this.vecStageDeltaV += this.vecThrust * (float)((this.currentisp * STD_GRAVITY * Math.Log(this.stepStartMass / this.stepEndMass)) / this.simpleTotalThrust);
}
// Update the active engines and resource drains for the next step
this.UpdateResourceDrains();
// Recalculate the current thrust and isp for the next step
this.CalculateThrustAndISP();
// Check if we actually changed anything
if (this.stepStartMass == this.stepEndMass)
{
//MonoBehaviour.print("No change in mass");
break;
}
// Check to stop rampant looping
if (loopCounter == 1000)
{
MonoBehaviour.print("exceeded loop count");
MonoBehaviour.print("stageStartMass = " + this.stageStartMass);
MonoBehaviour.print("stepStartMass = " + this.stepStartMass);
MonoBehaviour.print("StepEndMass = " + this.stepEndMass);
Logger.Log("exceeded loop count");
Logger.Log("stageStartMass = " + this.stageStartMass);
Logger.Log("stepStartMass = " + this.stepStartMass);
Logger.Log("StepEndMass = " + this.stepEndMass);
break;
}
// The next step starts at the mass this one ended at
this.stepStartMass = this.stepEndMass;
}
// Store more values in the Stage object and stick it in the array
// Store the magnitude of the deltaV vector
stage.deltaV = this.vecStageDeltaV.magnitude;
stage.resourceMass = this.stageStartMass - this.stepEndMass;
// Recalculate effective stage isp from the stage deltaV (flip the standard deltaV calculation around)
// Note: If the mass doesn't change then this is a divide by zero
if (this.stageStartMass != this.stepStartMass)
{
stage.isp = stage.deltaV / (STD_GRAVITY * Math.Log(this.stageStartMass / this.stepStartMass));
}
else
{
stage.isp = 0;
}
// Zero stage time if more than a day (this should be moved into the window code)
stage.time = (this.stageTime < SECONDS_PER_DAY) ? this.stageTime : 0d;
stage.number = this.doingCurrent ? -1 : this.currentStage; // Set the stage number to -1 if doing current engines
stage.totalPartCount = this.allParts.Count;
stages[this.currentStage] = stage;
// Now activate the next stage
this.currentStage--;
this.doingCurrent = false;
if (log != null)
{
// Log how long the stage took
this._timer.Stop();
MonoBehaviour.print("Simulating stage took " + this._timer.ElapsedMilliseconds + "ms");
stage.Dump();
this._timer.Reset();
this._timer.Start();
}
// Activate the next stage
this.ActivateStage();
if (log != null)
{
// Log how long it took to activate
this._timer.Stop();
MonoBehaviour.print("ActivateStage took " + this._timer.ElapsedMilliseconds + "ms");
}
}
// Now we add up the various total fields in the stages
for (int i = 0; i < stages.Length; i++)
{
// For each stage we total up the cost, mass, deltaV and time for this stage and all the stages above
for (int j = i; j >= 0; j--)
{
stages[i].totalCost += stages[j].cost;
stages[i].totalMass += stages[j].mass;
stages[i].totalDeltaV += stages[j].deltaV;
stages[i].totalTime += stages[j].time;
stages[i].partCount = i > 0 ? stages[i].totalPartCount - stages[i - 1].totalPartCount : stages[i].totalPartCount;
}
// We also total up the deltaV for stage and all stages below
for (int j = i; j < stages.Length; j++)
{
stages[i].inverseTotalDeltaV += stages[j].deltaV;
}
// Zero the total time if the value will be huge (24 hours?) to avoid the display going weird
// (this should be moved into the window code)
if (stages[i].totalTime > SECONDS_PER_DAY)
{
stages[i].totalTime = 0d;
}
}
if (log != null)
{
this._timer.Stop();
MonoBehaviour.print("RunSimulation: " + this._timer.ElapsedMilliseconds + "ms");
}
FreePooledObject();
return(stages);
}