Strange errors in new revision

Troubleshooting graphics
1

I get lots of these errors in new revision (still don’t know if they are problems in JME3 or problems in my program - although I didn’t have them before…):



SEVERE: Uncaught exception thrown in Thread[LWJGL Renderer Thread,6,main]

java.lang.IllegalStateException: Scene graph is not properly updated for rendering.Make sure scene graph state was not changed after rootNode.updateGeometricState() call.

at com.jme3.scene.Spatial.checkCulling(Spatial.java:213)

at com.jme3.renderer.RenderManager.renderScene(RenderManager.java:399)

at com.jme3.renderer.RenderManager.renderViewPort(RenderManager.java:598)

at com.jme3.renderer.RenderManager.render(RenderManager.java:627)

at com.jme3.app.SimpleApplication.update(SimpleApplication.java:185)

at com.jme3.system.lwjgl.LwjglAbstractDisplay.runLoop(LwjglAbstractDisplay.java:112)

at com.jme3.system.lwjgl.LwjglCanvas.runLoop(LwjglCanvas.java:194)

at com.jme3.system.lwjgl.LwjglAbstractDisplay.run(LwjglAbstractDisplay.java:166)

at java.lang.Thread.run(Unknown Source)



I am rendering inside Canvas if it is of any help…

2

You do something wrong in your update order. Somehow you modify the location or rotation or something else of a Spatial after rootNode.updateGeometricState() has been called and before render() is called. It might also be that you miss an rootNode.updateGeometricState() call for some pre view or something altogether.



Cheers,

Normen

3

Hmm, I suspect that this is probably because I am rendering in Canvas and I am attaching and detaching children to my rootNode, based on user actions in Swing part. I am doing this with Callable and enque, as you normen once suggested. :slight_smile:

The problem is that everything worked fine until I updated my SVN copy of JME3 to latest revision. I checked history and found out that this changed in this revision: http://code.google.com/p/jmonkeyengine/source/detail?r=5860.

So I am curious how we are supposed to do such things now (when this Callable thing doesn’t work anymore)? :slight_smile:

4

The callable thing should work, guess its something else… Maybe we should output the name of the node that caused the trouble so its easier to debug.

5

Ok, this thing is still bothering me. Can’t get this to work no matter what I try. Since there is no way I change scene graph state after rootNode.updateGeometricState() and before renderManager.render(tpf) in SimpleApplication.update() method, I can only conclude that this Callable thing doesn’t work as it is supposed to (and it probably changes scene graph state right between those lines).

Any ideas what can I do? :confused:

6

I committed a change to svn that outputs the “problem spatial” when you get that exception so you can debug better.

Cheers,

Normen

7

Cool, that helped! Thank you!

8

So what was it?

9

Seems that I must wrap some more of my code to Callable… :slight_smile:

I have wrapped only detach/attach parts and forgot about some elements which I scaled (there weren’t lots of them so I got confused). Obviously that must be wrapped too…

Any other things that are necessary to be injected in main graphics thread? :slight_smile:

10

Everything thats modifying the scenegraph or objects therein.