Linux bug ?

Question

Hi,
this is a bug concerning Java3D for linux (problem not seen under windows (!!) )
from demo installed with the jdk : in directory OffScreenCanvas3D, in file PrintFromButton.java
here is some code which works :
GraphicsConfiguration config = SimpleUniverse.getPreferredConfiguration();
u = new SimpleUniverse(d);
// create an off Screen Buffer
c = new OffScreenCanvas3D(config, true, drawRaster);
and here is some code which does NOT works : (crash !!)
GraphicsConfiguration config = SimpleUniverse.getPreferredConfiguration();
// create an off Screen Buffer
c = new OffScreenCanvas3D(config, true, drawRaster);
u = new SimpleUniverse(d);
compiling is ok, but when running,
I've got this error :
An unexepcted exception has been detected in native ocde outside the VM.
Unexpected Signal : 11 occured at PC=0x4bd6ab6a
Function name = java_javax_media_j3d_Canvas3D_createOffScreenBuffer
Library=/usr/java/jdk1.3.1_01/jre/lib/i386/libJ3D.so
Current java thread: at javax.media.j3d.Canvas3D.createOffscreenBuffer(Native Method)
This error doesn't occur under Windows (W2000, jdk 1.3.1_03)
In my application I don't want to use a SimpleUniverse, and don't want to have some On-screen canvas.
Another thing : if I instanciate u = SimpleUniverse, I have a new windows which appears (under Windows too) how can I avoid it ?
does anybody works under linux in this forum ?
Gilles Parisot.
[email protected]

Answer 1

after searching a lot, it seems that it is about a GraphicsConfiguration thing :
when creating a object of class "Viewer", there is a Canvas3D object created.
But I have not the code source of Viewer.java (can someone helps ?)
Maybe it is in the linux version only.
When trying to instanciate a Canvas3D with "null" as param, I got an exception OR a warning, depending on where in the code I do it !!!
With the warning I have a crash as before,
with the exception, I don't know what to do... (see last post)
Gilles.
to LouisGL :
RedHat 7.2
j3d 1.3b
jdk 1.3.1_01