public void changeState(BaseGameState state, Transition out, Transition in) {
if (state == null) {
throw new IllegalArgumentException("State must not be null!");
}
if (isTransitioning()) {
if (leaving != null) {
completeLeave();
}
if (entering != null) {
completeEnter();
}
}
leaving = out;
entering = in;
nextState = state;
currentState.onLeave(nextState);
nextState.onEnter(currentState);
if (leaving == null) {
completeLeave();
}
}
private void completeEnter() {
if (!persistentStates.containsValue(prevState)) {
prevState.dispose();
}
currentState.onEnterComplete();
prevState = null;
entering = null;
}
public void addPersistentState(BaseGameState state) {
if (state == null) {
throw new IllegalArgumentException("State must not be null!");
}
if (persistentStates.containsKey(state.getClass())) {
throw new IllegalStateException("A state of that class has already been added!");
}
persistentStates.put(state.getClass(), state);
}
@Override
public final void render() {
long time = System.currentTimeMillis();
float delta = (time - lastTime) * 0.001f;
lastTime = time;
preUpdate(delta);
updateTransitions(delta);
if (leaving != null) {
if (leaving.isReverse()) {
leaving.render(delta, screenCamera, nextState, currentState);
} else {
leaving.render(delta, screenCamera, currentState, nextState);
}
} else if (entering != null) {
if (entering.isReverse()) {
entering.render(delta, screenCamera, prevState, currentState);
} else {
entering.render(delta, screenCamera, currentState, prevState);
}
} else {
currentState.update(delta);
}
postUpdate(delta);
}
private void completeLeave() {
currentState.onLeaveComplete();
prevState = currentState;
currentState = nextState;
nextState = null;
leaving = null;
if (entering == null) {
completeEnter();
}
}
