@Override
public boolean hasFocus() {
DisplayDevice display = CoreRegistry.get(DisplayDevice.class);
return gameFocused && display.isActive();
}
/**
* The main loop runs until the EngineState is set back to INITIALIZED by shutdown() or until the
* OS requests the application's window to be closed. Engine cleanup and disposal occur
* afterwards.
*/
private void mainLoop() {
NetworkSystem networkSystem = CoreRegistry.get(NetworkSystem.class);
DisplayDevice display = CoreRegistry.get(DisplayDevice.class);
PerformanceMonitor.startActivity("Other");
// MAIN GAME LOOP
while (engineState == EngineState.RUNNING && !display.isCloseRequested()) {
long totalDelta;
float updateDelta;
float subsystemsDelta;
// Only process rendering and updating once a second
if (!display.isActive() && isHibernationAllowed()) {
time.setPaused(true);
Iterator<Float> updateCycles = time.tick();
while (updateCycles.hasNext()) {
updateCycles.next();
}
try {
Thread.sleep(100);
} catch (InterruptedException e) {
logger.warn("Display inactivity sleep interrupted", e);
}
display.processMessages();
time.setPaused(false);
continue;
}
processPendingState();
if (currentState == null) {
shutdown();
break;
}
Iterator<Float> updateCycles = time.tick();
try (Activity ignored = PerformanceMonitor.startActivity("Network Update")) {
networkSystem.update();
}
totalDelta = 0;
while (updateCycles.hasNext()) {
updateDelta = updateCycles.next(); // gameTime gets updated here!
totalDelta += time.getDeltaInMs();
try (Activity ignored = PerformanceMonitor.startActivity("Main Update")) {
currentState.update(updateDelta);
}
}
subsystemsDelta = totalDelta / 1000f;
for (EngineSubsystem subsystem : getSubsystems()) {
try (Activity ignored =
PerformanceMonitor.startActivity(subsystem.getClass().getSimpleName())) {
subsystem.preUpdate(currentState, subsystemsDelta);
}
}
// Waiting processes are set by modules via GameThread.a/synch() methods.
GameThread.processWaitingProcesses();
for (EngineSubsystem subsystem : getSubsystems()) {
try (Activity ignored =
PerformanceMonitor.startActivity(subsystem.getClass().getSimpleName())) {
subsystem.postUpdate(currentState, subsystemsDelta);
}
}
PerformanceMonitor.rollCycle();
PerformanceMonitor.startActivity("Other");
}
PerformanceMonitor.endActivity();
// This becomes important only if display.isCloseRequested() is true.
// In all other circumstances the EngineState is already set to
// INITIALIZED by the time the flow gets here.
engineState = EngineState.INITIALIZED;
}