Lee,
It may be working in 24 bit mode because ATI may not be providing any
hardware acceleration in 24 bit mode and hence Java 3D is rendering it
correctly in software. Certainly there are other cards (Voodoo) that
don't accelerate in 24 bit mode.
Good luck getting ATI to even respond to you. Our brief encounter with
them and the OEMs that ship PCs with ATI chipsets was essentially
"OpenGL? What's that? No, sorry, we don't support OpenGL." 3dfx at
least responded about their texture corruption issue and admitted their
driver was buggy but to the best of my knowledge they haven't fixed it
yet (and this is now 8 months later).
- John Wright
Starfire Research
"J. Lee Dixon" wrote:
>
> And to boot, I figured one more thing out. Sure, 24-bit mode works.
> But it works SLOWLY! They even say in the readme that 3D acceleration
> is only under 16-bit mode. This really stinks.
>
> Does someone at Sun have a way to get ATI to fix this? I don't think I
> can go to ATI with a Java3D example to get help. I don't really want to
> make an OpenGL example just for the sake of getting tech support. I
> would think that Sun would have more pull than me anyway.
>
> BTW, anybody try this on an ATI running J3D DirectX?? I'm on NT :(
>
> -Lee
>
> -----Original Message-----
> From: John Wright [mailto:[EMAIL PROTECTED]]
> Sent: Wednesday, September 20, 2000 1:43 PM
> To: [EMAIL PROTECTED]
> Subject: Re: [JAVA3D] Fade-out of transparency textured polygons
>
> Lee,
>
> Tested your test applet on a GeForce 256 system (16 bit color mode) and
> your text does look "purple".
>
> One more strike against ATI's drivers.
>
> - John Wright
> Starfire Research
>
> "J. Lee Dixon" wrote:
> >
> > Well, looks like it's a case of broken drivers again. I started with
> > the TextureModeApp from the Java3D examples and changed it to play
> > with
> > transparent textures and shape transparency.
> >
> > If you run this, you should see a blue (0,0,1) background, with a
> > Text2D
> > object (which uses transparency textures). The Text2D is in red
> > (1,0,0), but the Shape3D is set to have a transparency of 0.5, so the
> > text should look purple.
> >
> > On my Rage PRO video card the text looks bold red, not purple.
> > I've tried this on a STB Velocity 3D and a Riva TNT2 M64, both work
> > (show purple).
> >
> > Anybody else care to try? This was annoying!!! ;)
> > I would love to have ONE applet that would test these kind of
> > capabilities out. I plan on making these kind of notes available on
> > the
> > J3D.org site...
> >
> > -Lee
> > J. Lee Dixon
> > Software Engineer
> > SAIC - Celebration, FL
> > [EMAIL PROTECTED]
> >
> > -----Original Message-----
> > From: Doug Gehringer [mailto:[EMAIL PROTECTED]]
> > Sent: Tuesday, September 19, 2000 2:11 PM
> > To: [EMAIL PROTECTED]
> > Subject: Re: [JAVA3D] Fade-out of transparency textured polygons
> >
> > > Perhaps this is a bug?? I think
> > > it is time for a test app to show others (Sun)...
> >
> > Yes, please. You've got a couple pieces involved here and it is
> > getting
> > pretty
> > complex to figure out what is going on without code. I'm not sure
> > that
> > you'll
> > be able to get what you want, but I think your approach of looking at
> > the
> > equations makes sense. What happens when use Replace mode and then
> > use
> > the
> > polygon transparency to modulate the overall transparency?
> >
> > Doug Gehringer
> > Sun Microsystems
> >
> > ---------------------------------------------------------------
> >
> > TextureModeApp.htmlName: TextureModeApp.html
> > Type: Hypertext Markup Language (text/html)
> >
> > Name: TextureModeApp.java
> > TextureModeApp.java Type: JAVA File
> >
> (application/x-unknown-content-type-javaFile)
> > Encoding: quoted-printable
> >
> > Name: TextureModeApp.class
> > TextureModeApp.class Type: unspecified type
> > (application/octet-stream)
> > Encoding: base64
>
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