I mentioned that my polygon was already fully transparent to support the
alpha channel texture. The alpha component of the polygon does not seem
to affect the transparency of the texture when the texture has an alpha
channel.
I guess I could also be more specific. When I say "fade-out", I mean
fade over *time*, not over distance.
-Lee
-----Original Message-----
From: Yazel, David J. [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, September 19, 2000 10:16 AM
To: [EMAIL PROTECTED]
Subject: Re: [JAVA3D] Fade-out of transparency textured polygons
Hmmm,
Two ways:
1) Interesting way but probably not what you want is to set the color of
the
vertex to include an alpha component and fade across your vertices,
using
modulate with the texture. I know this works in opengl, I assume it
does in
Java3d.
2) The next way is to use a transparent polygon, and blend a texture in
which has an ever increasing (decreasing?) alpha, this is the technique
I
use to make a terrain transition, I overlay two meshes and fade one out.
Dave
> ----------
> From: J. Lee Dixon[SMTP:[EMAIL PROTECTED]]
> Reply To: Discussion list for Java 3D API
> Sent: Tuesday, September 19, 2000 8:42 AM
> To: [EMAIL PROTECTED]
> Subject: [JAVA3D] Fade-out of transparency textured polygons
>
> A while back I fought with the settings to make transparency textures
> work. I could easily place the texture on the polygon, but the places
> where the alpha value of the texture was 0, it showed the color of the
> polygon. It didn't make sense to me that I could see the underlying
> polygon at all.
>
> I fixed the problem by setting the TransparencyAttributes to be
totally
> transparent. Fine.
>
> Now, how do I make the whole object fade out?? Normally, I would fade
> using the TransparencyAttributes, but it is already set to totally
> transparent.
>
> I thought applying a texture with alpha set to 0 would make the
polygon
> invisible; I shouldn't have to set the poly transparency as well...
>
> -Lee
>
> J. Lee Dixon
> Software Engineer
> SAIC - Celebration, FL
> [EMAIL PROTECTED]
>
>
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