Michael, I also use a separate thread for rendering, and it works fine, although slower than I'd like. Thanks for your input.
John B. -----Original Message----- From: Discussion list for Java 3D API [mailto:[EMAIL PROTECTED]] On Behalf Of Michael Nischt Sent: Thursday, June 27, 2002 11:39 AM To: [EMAIL PROTECTED] Subject: Re: [JAVA3D] Problems with off-screen rendering Hi John, don't know whether this helps you: my ImageRenderCanvas works for rendering offscreen images, using a seprate Thread (see attachment). It worked under win2k 1.21 and 1.3 beat 1,2 and under linux with 1.2.1 with -Dj3d.sharedctx=false option (bad performance). unfortunally there is another bug with the perspective (Mark from Java3D team told me, he submitted it), but in case your onscreen canvas is of a squared dimension it worked fine for me.. regards -Michael On Thursday 27 June 2002 20:26, John Barrus wrote: > Kelvin, > > Is there no workaround right now? I don't mind rebuilding part of the > scene graph or something if I need to. > > Do you know anything about the trigger? It seems like it just started > happening a week ago, but I made several changes and I'm not sure which > ones might have affected it. > > Sincerely, > > John B. > > > -----Original Message----- > From: Discussion list for Java 3D API > [mailto:[EMAIL PROTECTED]] On Behalf Of Kelvin Chung > Sent: Thursday, June 27, 2002 10:49 AM > To: [EMAIL PROTECTED] > Subject: Re: [JAVA3D] Problems with off-screen rendering > > > Hi John, > > This is bug 4701430 - > Infrequent NPE at RenderBin.java:544 > > which has a workaround in the upcoming v1.3 release. > > - Kelvin > ---------------- > Java 3D Team > Sun Microsystems Inc. > > >Date: Thu, 27 Jun 2002 09:43:41 -0700 > > From: John Barrus <[EMAIL PROTECTED]> > > >Subject: [JAVA3D] Problems with off-screen rendering > >To: [EMAIL PROTECTED] > >MIME-version: 1.0 > >X-MIMEOLE: Produced By Microsoft MimeOLE V5.00.2314.1300 > >Content-transfer-encoding: 7bit > >Importance: Normal > >X-Priority: 3 (Normal) > >X-MSMail-priority: Normal > >Delivered-to: [EMAIL PROTECTED] > > > >I have an application that renders to an image offscreen and then > > combines > > >the rendered image with a photograph. Unfortunately, there are times > > when > > >the render thread dies and I get the following error: > > > >java.lang.NullPointerException > > at javax.media.j3d.RenderBin.updateObject (RenderBin.java:544) > > at javax.media.j3d.MasterControl.updateMirrorObjects > >(MasterControl.java:2633) > > at javax.media.j3d.MasterControl.runMonitor > >(MasterControl.java:3321) > > at javax.media.j3d.MasterControl.doWork > > (MasterControl.java:2890) > > > at javax.media.j3d.MasterControlThread.run > >(MasterControlThread.java:28) > > From then on, I cannot render any more. I get the following > > >error every time I try to render the image again: > > > >javax.media.j3d.RestrictedAccessException: Canvas3D: Off- > >screening rendering is in progress > > at javax.media.j3d.Canvas3D.renderOffScreenBuffer > >(Canvas3D.java:1868) > > at app.MeshRenderer.getImage(MeshRenderer.java:716) > > at app.PerspectiveGrid$ImageThread.run > > (PerspectiveGrid.java:805) > > >I figured out how to detect the error, but I can't figure out how to > > restart > > >the renderer. I get an error when I try to apply stopRenderer() or > >startRenderer() to the Canvas3D. > > > >Any suggestions? > > > >I filed a bug report with Sun. > > > >John Barrus > > > >======================================================================= > > ==== > > >To unsubscribe, send email to [EMAIL PROTECTED] and include in the > > body > > >of the message "signoff JAVA3D-INTEREST". For general help, send email > > to > > >[EMAIL PROTECTED] and include in the body of the message "help". > > ======================================================================== > === > To unsubscribe, send email to [EMAIL PROTECTED] and include in the > body > of the message "signoff JAVA3D-INTEREST". For general help, send email > to > [EMAIL PROTECTED] and include in the body of the message "help". > > ======================================================================== === > To unsubscribe, send email to [EMAIL PROTECTED] and include in the body > of the message "signoff JAVA3D-INTEREST". For general help, send email to > [EMAIL PROTECTED] and include in the body of the message "help". =========================================================================== To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff JAVA3D-INTEREST". For general help, send email to [EMAIL PROTECTED] and include in the body of the message "help".
