State Management

archive development-discussion-jme2
21

Uhm ok, can be shared between different contexes… though with a little more trouble than I thought by the looks of it (platform specific methods).

22

FYI, if you haven't noticed already, this code is now in CVS.

23

After updating, I get a NullPointerException in LWJGLZBufferState.enableDepthTest.


Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
   at com.jme.scene.state.lwjgl.LWJGLZBufferState.enableDepthTest(LWJGLZBufferState.java:107)
   at com.jme.scene.state.lwjgl.LWJGLZBufferState.apply(LWJGLZBufferState.java:67)
   at com.jme.renderer.lwjgl.LWJGLRenderer.clearZBuffer(LWJGLRenderer.java:444)
   at com.jme.renderer.lwjgl.LWJGLRenderer.clearBuffers(LWJGLRenderer.java:480)
   at factory.SharedCanvasImpl.doRender(SharedCanvasImpl.java:163)
   at com.jmex.awt.lwjgl.LWJGLCanvas.paintGL(LWJGLCanvas.java:98)
   at org.lwjgl.opengl.AWTGLCanvas.paint(AWTGLCanvas.java:295)
   at sun.awt.RepaintArea.paintComponent(RepaintArea.java:248)
   at sun.awt.X11.XRepaintArea.paintComponent(XRepaintArea.java:56)
   at sun.awt.RepaintArea.paint(RepaintArea.java:224)
   at sun.awt.X11.XComponentPeer.handleEvent(XComponentPeer.java:630)
   at java.awt.Component.dispatchEventImpl(Component.java:4031)
   at java.awt.Component.dispatchEvent(Component.java:3803)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)
   at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:242)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)



The ZBufferStateRecord instance passed to the method is null. Do I have to call additional setup code due to the new state management?
Thanks in advance...
24

Hmm, looks like you are running in a canvas.  Please see reply#3 in this very thread (http://www.jmonkeyengine.com/jmeforum/index.php?topic=4049.msg32357#msg32357)  Are you following that?

25

I have a custom CanvasImplementor, and I am setting it up as described (ok, I added an enableStatistics call):

   
public void doSetup() {
        DisplaySystem display = DisplaySystem.getDisplaySystem();
        renderer = new LWJGLRenderer(width, height);
        renderer.setHeadless(true);
        renderer.enableStatistics(true);
        display.setRenderer(renderer);
        display.getCurrentContext().setupRecords(renderer);
[...]



but it gives me:


Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
        at com.jme.renderer.lwjgl.LWJGLRenderer.displayBackBuffer(LWJGLRenderer.java:507)
        at editor.swingStuff.CanvasImplementor.doRender(CanvasImplementor.java:135)
        at com.jmex.awt.lwjgl.LWJGLCanvas.paintGL(LWJGLCanvas.java:98)
        at org.lwjgl.opengl.AWTGLCanvas.paint(AWTGLCanvas.java:295)
[...]



Apparently, Renderer.defaultStateList[RenderState.RS_COLORMASK_STATE] is null... Any ideas?
26

A call to display.updateStates(renderer) in my CanvasImplementor's doSetup() fixed it - is this the "good way" of solving the problem?

27

Yes, that's part of the simple implementations as well.