Yes, I use PNG format for alpha channel blending on that platform. Just
make the polygon 100 percent transparent, BLENDED, load the PNG file in RGBA
mode and set texture attributes to replace. I don't have my code here or I
would post it.
Dave Yazel
> ----------
> From: Mark Ferneau[SMTP:[EMAIL PROTECTED]]
> Reply To: Discussion list for Java 3D API
> Sent: Friday, September 08, 2000 1:03 PM
> To: [EMAIL PROTECTED]
> Subject: Re: [JAVA3D] Semitransparency
>
> Sure,
>
> I do this in my application. Ideally you should be able to use the
> alpha channel of a texture to let you do this, though I was not
> successful
> using an SGI RGBA image file on the Win32 platform with JDK 1.3 and J3D
> 1.2.1 (D3D) or J3D 1.2 (OGL).
>
> Therefore I assign the texture to a polygon and set the transparency
> material attribute to not be opaque.
>
> Appearance xAppearance = new Appearance();
> Material xMaterial = new Material();
> PolygonAttributes xPA = new PolygonAttributes();
> TransparencyAttributes xTranspA = new
> TransparencyAttributes( TransparencyAttributes.NICEST, 0.20f
> );
> xAppearance.setMaterial( xMaterial );
> xAppearance.setPolygonAttributes( xPA );
> xAppearance.setTransparencyAttributes( xTranspA );
>
> If anyone knows how to properly utilize an SGI RGBA or other image file
> format with an alpha channel on the platform described above I'd very,
> very, very much appreciate it.
>
> --Mark
>
> At 05:46 AM 9/9/2000 +0200, you wrote:
> >Hello!
> >
> >Just a brief question: does java3D support semitransparency? If I want to
> >show to photos above one another, and see through the frontmost layer, is
> >that possible?
> >
> >Best regards
> >Thomas
> >
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>
> Mark Ferneau 240-462-6262 (cell)
> Director of Adv. Technology 801-437-4608 (efax)
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