By default, SimpleApplication pauses the update loop whenever the window loses focus, that is, the player switches to another application. For multiplayer or real-time applications, pausing one of the players is not even an option. For such games, you need to deactivate the default pausing behavior in the simpleInitApp() method:
Make a copy of
Main.javaand name the classFocusTest.java. Remember to also refactor the first line of themain()method toFocusTest app = new FocusTest();.In
simpleInitApp(), change the application behavior as follows:public void simpleInitApp() { setPauseOnLostFocus(false); }In the
simpleUpdate()loop, add the following sample code:public void simpleUpdate(float tpf) { rootNode.rotate(tpf,tpf,tpf); }
When you run the application, the blue cube rotates. When you switch to the desktop, the cube should continue rotating.
Remove the setPauseOnLostFocus() line (or set it to true) and run the sample again. When you switch to the...