I too am having the same problem and have not found the answer on the archive. I have tried using thr RenderingAttributes fix, but no luck. Has anyone found an answer, or is it a bug. I am using NT 4, Pentium 333, 128Mb ram, FireGL pro 1000 4.00.1381.0201,4.0.0 driver(3dlabs Permedia2) w/8Mb ram James Harrison Carnegie Mellon Univerisity http://www.cs.cmu.edu/~jaharris > >>For quite some time, I have had problems with the drawing order of objects >>in my "universe". Objects which are laid out toward the back of the scene >>are being drawn on top of objects which were placed toward the front of the >>scene (and vice versa). I can get simple examples (such as "SphereMotion") >>to work just fine but my more-complicated code never appears correctly >>although the code structure is nearly identical. >> >>I have tried the RenderingAttributes fix mentioned in the Java3D FAQ: >> >> http://tintoy.ncsa.uiuc.edu/~srp/java3d/faq.html >> >>but it did not seem to help at all (however, this FAQ still has other good >>info). I have also searched the mailing-list archives at: >> >> http://java.sun.com/products/java-media/mail-archive/3D/index.html >> >>with no more luck (again, this is still a lot of useful info here). >> >>I am able to change the ordering of the objects by instantiating my shapes >>in a different order but that is not how the 3D system should render / >>present them. Since I am dealing with orbiting objects, this ordering >scheme >>needs to be correct all the time since the shapes are frequently switching >>places within the view. >> >>I am new to OpenGL systems (as used by Java3D) and feel that there might be >>a software / hardware issue involved. My current system is a 300 MHz >Pentium >>Pro, 128 Mb RAM, Permedia 2 card with 4 Mb of memory, and OpenGL driver >>1.1.23 (from 3dlabs). I don't think the hardware is a problem but I don't >>know what all of the variables are in this equation. I have heard mention >of >>Z-Buffer issues and configurations within Java3D and/or OpenGL but do not >>know what the solutions to these problems might be (or even how to >>investigate them). >> >>I should also point out that my project requires that I use distances which >>are on an astronomical scale and therefore I may be running into precision >>problems with floats and doubles. I don't feel that this is in opposition >to >>the original intentions of Java3D, which advocated using natural units (see >>http://java.sun.com/products/java-media/3D/forDevelopers/j3dguide/VirtualUn >i >>verse.doc.html#49034), but I currently am forced to set my View's >>backClipDistance to 2.0e11d to see any of the large objects in my scene. >>This and other numbers I use in my universe are substantially larger than >>those found in any of the example code which is available for Java3D and >>possibly this is causing problems. At present, I am only using one Locale >>for all of my objects (due to problems in earlier versions of Java3D which >>may no longer exist) and this is another possible source of problems. >> >>With regards to the recent "where are the answers" thread; I will gladly >>accept direct responses and will repost summarized solutions as soon as >>possible. As always, mailing-list responses will also be greatly >appreciated >>--- you make the choice when you reply. >> >>Thanks, >>Brian >>--- >>Brian D. Kubena >>Lockheed Martin Space Mission Systems & Services >>[EMAIL PROTECTED] >>281/483-8015, voice/phonemail >>713/736-3323, pager/phonemail >>281/483-2606, fax >------------------------------------------------------------ >>To subscribe/unsubscribe, send mail to [EMAIL PROTECTED] >>Java 3D Home Page: http://java.sun.com/products/java-media/3D/ > >------------------------------------------------------------ >To subscribe/unsubscribe, send mail to [EMAIL PROTECTED] >Java 3D Home Page: http://java.sun.com/products/java-media/3D/ > >From [EMAIL PROTECTED] Fri Sep 11 21:38:58 1998 >Return-Path: <[EMAIL PROTECTED]> >Received: by capra.eng.sun.com (SMI-8.6/SMI-SVR4) > id VAA26346; Fri, 11 Sep 1998 21:38:17 -0700 > I =========================================================================== 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".
