Re: Limit of 32 Canvas

• To: Liedl Johann <johann.liedl@xxxxxxxxxxxxxx>
• Subject: Re: Limit of 32 Canvas
• From: Bill Hibbard <hibbard@xxxxxxxxxxxxxxxxx>
• Date: Mon, 28 Jan 2002 12:01:49 -0600

Hi Hannes,

> My application creates more than 32 DisplayImpl (in different windows). On 
> creating the 32nd object an Exception occurs in the
> javax.media.j3d.MasterControl.getCanvasBit() method. I decompile this class. 
> The source code is the following one:
> 
> int getCanvasBit() {
>    synchronized (canvasBitFreeList) {
>       if (canvasBitFreeList.size() == 0) {
>           if (canvasBitCount > 31)
>              throw new InternalError();
>            return 1 << canvasBitCount++;
>       }
>       return ((Integer) canvasBitFreeList.removeLastElement()).intValue();
>   }
> }
> 
> I know that this is not a visad class, but does anyone known the reason for 
> this limitation (maybe a limit in the opengl API)

This would be a great question for java3d-interest@xxxxxxx. See:

  http://java.sun.com/products/java-media/3D/forDevelopers/interest_group.html

for how to subscribe and post.

Cheers,
Bill
----------------------------------------------------------
Bill Hibbard, SSEC, 1225 W. Dayton St., Madison, WI  53706
hibbard@xxxxxxxxxxxxxxxxx  608-263-4427  fax: 608-263-6738
http://www.ssec.wisc.edu/~billh/vis.html

• References:
  • Limit of 32 Canvas
    • From: Liedl Johann