Rendering problems in java3d 1.6.0

Hello,

I've just updated from Java3D 1.5.2 to Java3D 1.6.0 and now I get a poor rendering and spiky edges where it should be round cylindrical appearances of my gears:


how it was with Java3d 1.5.2:
java3d_1.JPG

Maybe I have to change some settings or some little adjustments in my code?

I use basically the following to generate my Java3D-Elements:

GeometryInfo gi=new GeometryInfo(triangleStripArray);
NormalGenerator normGen=new NormalGenerator();    
normGen.generateNormals(gi);
Shape3D shape=new Shape3D();
shape.setGeometry(gi.getGeometryArray());

I would really appreciate to here from you all.

Kind regards,
Miro

Hey

Please can you reproduce your problem on several different computers? If it persists, you'll have to provide a SSCCE.

Hi Miro,
Thanks for posting this issue.

As mentioned we'll need a bit more information to be able to investigate and give you an answer.

Generally speaking the calls you are using to GeometryInfo and NormalGenerator are exactly the same in the 2 versions and are unlikely to be the cause of the issue. I'd say given the nice curved outer parts of the image that the geometry generated is about right.

Looking at the image my very first thought is that your z-buffer is not big enough and you are getting z-fighting. This would not be unexpected as the internal configuration of a Canvas3D and it's associated graphics context in back end is quite different between the 2 versions.

So to move forward we really need to see how you are setting up your Canvas3D in code and your hardware specs.

Then after that possibly a bit of debug output for the configurations supported by your driver and the defaults picked, which I can tell you how to get after you post the first 2 parts.

Thanks,
Phil.

Hi Phil,

here is my (simple) code:

GraphicsConfiguration config=SimpleUniverse.getPreferredConfiguration();
canvas=new Canvas3D(config);
universe=new SimpleUniverse(canvas);
universe.addBranchGraph(scene);

OrbitBehavior orbit=new OrbitBehavior(canvas, OrbitBehavior.REVERSE_ALL|OrbitBehavior.STOP_ZOOM);
universe.getViewingPlatform().setViewPlatformBehavior(orbit);

My Hardware:
8GB RAM, Intel i5-4670 CPU@3.40 GHz,
Graphics:


Software: Windows 7, Java 7.

Thank you for your efforts and answer.

Regards,
Miro

Thank you for the feedback with the information about your hardware but please provide a SSCCE. The few lines you provide don't allow to reproduce your problem.

This is a very late reply of course, but when I switched to 1.6 I had a similar rendering problem, where in some areas (randomly per run) the z-buffering didn't work.

Having put that code down for a few years, and just picked it back up, I found the problem was that I was getting the GraphicsConfiguration (SimpleUniverse.getPreferredConfiguration();) prior to creating the JFrame. Once the call is moved after, it worked fine again.

Image attached shows pre and post fix. I thought this may help someone so posted.

Thank you very much for your feedback. I hope that it will help some other developers having the same problem.