Strange Error since upgrading

Troubleshooting General Help
1

I updated jME today. Before, I ran the game and it was fine. However, now when I run, the following exception occurs:



SEVERE: Uncaught exception thrown in Thread[LWJGL Renderer Thread,5,main]

java.lang.UnsupportedOperationException: The buffer already set is incompatible with the given parameters



This occurs when I use Tangent TangentBinormalGenerator.generate();



Any help?

2

Sorry for bumping, but I have been trying to find the problem for hours. This is the code which is not working:



[java]for (int i = 0; i < 100; i++){

walls = assetManager.loadModel(“Models/Wall2/Wall2.j3o”);

walls.setMaterial(material);

y.attachChild(walls);

walls.setLocalTranslation(10i, 0, 0);

walls.setName(""+i);

TangentBinormalGenerator.generate(walls);

a = true;

p = walls.getLocalTranslation().x;

}[/java]



This is the complete exception (pointing at TangentBinormalGenerator.generate(walls); ):



[java]SEVERE: Uncaught exception thrown in Thread[LWJGL Renderer Thread,5,main]

java.lang.UnsupportedOperationException: The buffer already set is incompatible with the given parameters

at com.jme3.scene.Mesh.setBuffer(Mesh.java:910)

at com.jme3.scene.Mesh.setBuffer(Mesh.java:930)

at com.jme3.util.TangentBinormalGenerator.processTriangleData(TangentBinormalGenerator.java:614)

at com.jme3.util.TangentBinormalGenerator.generate(TangentBinormalGenerator.java:161)

at com.jme3.util.TangentBinormalGenerator.generate(TangentBinormalGenerator.java:111)

at com.jme3.util.TangentBinormalGenerator.generate(TangentBinormalGenerator.java:127)

at com.jme3.util.TangentBinormalGenerator.generate(TangentBinormalGenerator.java:118)

at mygame.Main.simpleInitApp(Main.java:135)

at com.jme3.app.SimpleApplication.initialize(SimpleApplication.java:228)

at com.jme3.system.lwjgl.LwjglAbstractDisplay.initInThread(LwjglAbstractDisplay.java:129)

at com.jme3.system.lwjgl.LwjglAbstractDisplay.run(LwjglAbstractDisplay.java:205)

at java.lang.Thread.run(Thread.java:722)

[/java]



It’s strange that this works:



[java]wall6 = assetManager.loadModel(“Models/HighWall/HighWall.j3o”);

wall6.setMaterial(material);

wall6.rotate(0, -90fFastMath.DEG_TO_RAD, 0);

wall6.setLocalTranslation(10, 0, 5);

TangentBinormalGenerator.generate(wall6); [/java]



Using the HighWall model works well, but opening the material files which come with them reveals that they’re identical.

3

One of those models has tangents generated by a really old version of jME3 so it only uses 3 coordinates instead of 4. The expected result in this case would be that the TangentBinormalGenerator regenerates the buffer with 4 coordinates, but here it is failing because the number of coordinates are not compatible.



I have fixed this issue in SVN, you may need to wait until nightly for it to be available though.

4

So new models (from scratch) should work well?

5

Just update to the nightly version, or re-create the j3o for that model

6

I tried recreating the .j3o, and even importing the model again, but no luck. I re-create the model and it worked. Apparently the problem was that the old one was having binormals generated. I noticed this when I compared the two mesh.xml files.

7

Binormals are not even used by the current version of jME3. Like I said, you probably have a 3 coordinate tangent buffer already set on that mesh

8

@Momoko_Fan:

And this error is strange too :



material.setParam(“BoneMatrices”, VarType.Matrix4Array, matrix4array);



This code doesn’t run anymore and no exception shown , the whole program just hang and need to stop by force !

:frowning: crazy one

9

Then that might be the problem Momoko, although I think I am using the same jME version. But as long as it’s working well… New models fixed everything.