Re: [JAVA3D] renderOffScreenBuffer & NullPointerException

[Kelvin Chung]

Smith, David wrote:

Don't use Behavior callback, try running on
user thread. A simple test case would be [EMAIL PROTECTED] for
us to see what's wrong.


I am in the user thread.  It's a callback from
a menu selection.  However my app is fairly large,
so I extracted out the necessary into two files attached.
If you get a picture, then it might be a platform
specific issue.  On my system it comes up as the background
color.  I basically combined TestOrbit with PrintFromButton.
But I also might be missing something.

Thanks for taking the time to look.
-DaveS

Java3D generate image correctly if you output the pixels of image:

BufferedImage bImageRet = offscreencanvas.
                                 getOffScreenBuffer().
                                    getImage();


     System.out.println("width " + bImageRet.getWidth() + " height " +
bImageRet.getHeight());
     int a, r, g, b, rgb;
     for (int i=0; i < bImageRet.getHeight(); i++) {
     for (int j=0; j < bImageRet.getWidth(); j++) {
         rgb = bImageRet.getRGB(j, i);
         a = (rgb >> 24) & 0xff;
         r = (rgb >> 16) & 0xff;
         g = (rgb >> 8) & 0xff;
         b = rgb & 0xff;
         System.out.print("(" + r + " " + g + " " + b + " " + a + " " +
")");
     }
     System.out.println("");
     }


It is the ImageIO that have problem to save it.
(besides a missing file close to flush output)
Please check with ImageIO API.
- Kelvin
------------
Java 3D Team
Sun Microsystems Inc.
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