/** Overridden version of the run method. Processes the simulation main loop. */
@Override
public void run() {
while (isStarted() && !terminate) {
try {
// synchronize on ui so that
// we can prevent reset() etc
// while half-way through a step
synchronized (ui) {
simulateOneStep();
ui.updateGUI();
}
Thread.sleep(10);
} catch (InterruptedException ie) {
ie.printStackTrace();
}
synchronized (this) {
while (isPaused()) {
try {
this.wait();
} catch (InterruptedException ie) {
ie.printStackTrace();
}
}
}
}
}
/**
* Bi-directional pause. A call to this method will invert the current pausing state and update
* the GUI to reflect this if the simulation is currently running.
*/
public static void pause() {
if (isStarted()) { // if we're started.
paused = !paused;
if (ui != null) {
ui.updateGUI();
}
}
}
/**
* Performs necessary calculations that need to update the user interface after environment
* variables have changed
*/
public static void settingsChanged() {
if (ui == null) { // if we don't have a user interface reference
ui = new UserInterface(); // make one.
return;
}
reset();
ui.clearJunctionCache();
ui.updateGUI();
if (paused == true) { // if we were paused beforehand
paused = false; // we are not paused anymore
}
}
/** Resets the simulation to default values. */
public static void reset() {
// cannot stop until the current step
// and rendering is complete
synchronized (ui) {
IJunction jn = (IJunction) getOption(JUNCTION_TYPE);
jn.removeVehicles();
totalTimeSteps = (int) settings.get(TIME_STEP);
setOption(TIME_STEP, 0);
started = false;
paused = false;
ui.clearJunctionCache();
ui.updateGUI();
}
}