@Override
public FlightData simulate(SimulationConditions simulationConditions) throws SimulationException {
// Set up flight data
FlightData flightData = new FlightData();
// Set up rocket configuration
this.fcid = simulationConditions.getFlightConfigurationID();
FlightConfiguration simulationConfig =
simulationConditions.getRocket().getFlightConfiguration(this.fcid).clone();
if (!simulationConfig.hasMotors()) {
throw new MotorIgnitionException(
trans.get("BasicEventSimulationEngine.error.noMotorsDefined"));
}
currentStatus = new SimulationStatus(simulationConfig, simulationConditions);
currentStatus
.getEventQueue()
.add(new FlightEvent(FlightEvent.Type.LAUNCH, 0, simulationConditions.getRocket()));
{
// main simulation branch
final String branchName = simulationConfig.getRocket().getTopmostStage().getName();
currentStatus.setFlightData(new FlightDataBranch(branchName, FlightDataType.TYPE_TIME));
}
toSimulate.add(currentStatus);
SimulationListenerHelper.fireStartSimulation(currentStatus);
do {
if (null == toSimulate.peek()) {
break;
}
currentStatus = toSimulate.pop();
log.info(">>Starting simulation of branch: " + currentStatus.getFlightData().getBranchName());
FlightDataBranch dataBranch = simulateLoop();
flightData.addBranch(dataBranch);
flightData.getWarningSet().addAll(currentStatus.getWarnings());
log.info(
String.format(
"<<Finished simulating branch: %s curTime:%s finTime:%s",
dataBranch.getBranchName(),
currentStatus.getSimulationTime(),
dataBranch.getLast(FlightDataType.TYPE_TIME)));
} while (!toSimulate.isEmpty());
SimulationListenerHelper.fireEndSimulation(currentStatus, null);
if (!flightData.getWarningSet().isEmpty()) {
log.info("Warnings at the end of simulation: " + flightData.getWarningSet());
}
return flightData;
}
@Override
public FlightData simulate(SimulationConditions simulationConditions) throws SimulationException {
Set<MotorId> motorBurntOut = new HashSet<MotorId>();
// Set up flight data
FlightData flightData = new FlightData();
// Set up rocket configuration
Configuration configuration = setupConfiguration(simulationConditions);
MotorInstanceConfiguration motorConfiguration = setupMotorConfiguration(configuration);
if (motorConfiguration.getMotorIDs().isEmpty()) {
throw new MotorIgnitionException("No motors defined in the simulation.");
}
// Initialize the simulation
currentStepper = flightStepper;
status = initialStatus(configuration, motorConfiguration, simulationConditions, flightData);
status = currentStepper.initialize(status);
SimulationListenerHelper.fireStartSimulation(status);
// Get originating position (in case listener has modified launch position)
Coordinate origin = status.getRocketPosition();
Coordinate originVelocity = status.getRocketVelocity();
try {
double maxAlt = Double.NEGATIVE_INFINITY;
// Start the simulation
while (handleEvents()) {
// Take the step
double oldAlt = status.getRocketPosition().z;
if (SimulationListenerHelper.firePreStep(status)) {
// Step at most to the next event
double maxStepTime = Double.MAX_VALUE;
FlightEvent nextEvent = status.getEventQueue().peek();
if (nextEvent != null) {
maxStepTime = MathUtil.max(nextEvent.getTime() - status.getSimulationTime(), 0.001);
}
log.verbose(
"BasicEventSimulationEngine: Taking simulation step at t="
+ status.getSimulationTime());
currentStepper.step(status, maxStepTime);
}
SimulationListenerHelper.firePostStep(status);
// Calculate values for custom expressions
FlightDataBranch data = status.getFlightData();
ArrayList<CustomExpression> allExpressions =
status.getSimulationConditions().getSimulation().getCustomExpressions();
for (CustomExpression expression : allExpressions) {
data.setValue(expression.getType(), expression.evaluate(status));
}
// Check for NaN values in the simulation status
checkNaN();
// Add altitude event
addEvent(
new FlightEvent(
FlightEvent.Type.ALTITUDE,
status.getSimulationTime(),
status.getConfiguration().getRocket(),
new Pair<Double, Double>(oldAlt, status.getRocketPosition().z)));
if (status.getRocketPosition().z > maxAlt) {
maxAlt = status.getRocketPosition().z;
}
// Position relative to start location
Coordinate relativePosition = status.getRocketPosition().sub(origin);
// Add appropriate events
if (!status.isLiftoff()) {
// Avoid sinking into ground before liftoff
if (relativePosition.z < 0) {
status.setRocketPosition(origin);
status.setRocketVelocity(originVelocity);
}
// Detect lift-off
if (relativePosition.z > 0.02) {
addEvent(new FlightEvent(FlightEvent.Type.LIFTOFF, status.getSimulationTime()));
}
} else {
// Check ground hit after liftoff
if (status.getRocketPosition().z < 0) {
status.setRocketPosition(status.getRocketPosition().setZ(0));
addEvent(new FlightEvent(FlightEvent.Type.GROUND_HIT, status.getSimulationTime()));
addEvent(new FlightEvent(FlightEvent.Type.SIMULATION_END, status.getSimulationTime()));
}
}
// Check for launch guide clearance
if (!status.isLaunchRodCleared()
&& relativePosition.length() > status.getSimulationConditions().getLaunchRodLength()) {
addEvent(new FlightEvent(FlightEvent.Type.LAUNCHROD, status.getSimulationTime(), null));
}
// Check for apogee
if (!status.isApogeeReached() && status.getRocketPosition().z < maxAlt - 0.01) {
addEvent(
new FlightEvent(
FlightEvent.Type.APOGEE,
status.getSimulationTime(),
status.getConfiguration().getRocket()));
}
// Check for burnt out motors
for (MotorId motorId : status.getMotorConfiguration().getMotorIDs()) {
MotorInstance motor = status.getMotorConfiguration().getMotorInstance(motorId);
if (!motor.isActive() && motorBurntOut.add(motorId)) {
addEvent(
new FlightEvent(
FlightEvent.Type.BURNOUT,
status.getSimulationTime(),
(RocketComponent) status.getMotorConfiguration().getMotorMount(motorId),
motorId));
}
}
}
} catch (SimulationException e) {
SimulationListenerHelper.fireEndSimulation(status, e);
throw e;
}
SimulationListenerHelper.fireEndSimulation(status, null);
flightData.addBranch(status.getFlightData());
if (!flightData.getWarningSet().isEmpty()) {
log.info("Warnings at the end of simulation: " + flightData.getWarningSet());
}
// TODO: HIGH: Simulate branches
return flightData;
}
