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Re: [udig-devel] uDig running on 3.4 
Hi Bas,
There is a bug on OSX Leopard Java 1.5 where you can't run SWT and AWT widget sets at the same time. If your Java3D makes any AWT widgets you will have problems. The bug was fixed on later versions of Tiger Java but not on Leopard. I haven't tried Java 1.6 that Apple ships. You might also try the BSD based port of Java 1.6 for OSX. 

Jesse

On 22-Aug-08, at 6:42 PM, Bas Retsios wrote:


Hello,
I am developing a plug-in for uDig (class MyView extends ViewPart). In this plug-in, I use Java3D (Canvas3D). In Windows and Linux I manage to add a perfectly working Canvas3D in uDig. However, on MacOS it fails (I tried on OS X 10.5, "Leopard"). I get a HeadlessException at the Java3D initialization. In particular the function GraphicsEnvironment.getDefaultScreenDevice() fails, and I found that this is because the MacOS version of uDig starts with java.awt.headless=true . 

Code examples that work on Windows and Linux, but not on MacOS:

// try 1
{
GraphicsConfiguration configuration = SimpleUniverse.getPreferredConfiguration(); // throws HeadlessException 
  Canvas3D canvas = new Canvas3D(configuration);
}

// try 2
{
  GraphicsConfigTemplate3D template = new GraphicsConfigTemplate3D();
GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment(); GraphicsDevice gd = ge.getDefaultScreenDevice(); // throws HeadlessException 
  GraphicsConfiguration[] gc = gd.getConfigurations();
GraphicsConfiguration configuration = template.getBestConfiguration(gc); 
  Canvas3D canvas = new Canvas3D(configuration);
}

Is there a solution for this?

Thanks in advance,

Bas.

--
Ir. V. (Bas) Retsios
Software Developer
Geo-information Processing Department
International Institute for Geo-information Science and Earth Observation (ITC) 
P.O. Box 6,  7500 AA Enschede, The Netherlands
Phone +31 (0)53 4874 573, telefax +31 (0)53 4874 335
E-mail retsios@xxxxxx, Internet http://www.itc.nl
International Institute for Geo-Information Science and Earth Observation (ITC) 
Chamber of Commerce: 410 27 560

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