Re: looking through a tinted window...

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Angus Dorbie (dorbie++at++multipass.engr.sgi.com)
Fri, 1 Aug 1997 04:37:58 -0700

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On Aug 1, 11:51am, Charlie H. Chang wrote:
> Subject: looking through a tinted window...
> Hi,
>
> In my application, I need to create several channels and one of them is
> viewed
> throught some kind of color filter lens. I tried to use OpenGL and draw
> a
> transparent color polygon in the draw call-back but the result was that
> only polygon
> was shown. Any example code that I can follow?
> Thank you in advance!

I bet you drew the polygon before you called pfDraw.

Try drawing it afterwards, this will about the zbuffer occlusion
I expect you are encountering.

Also if your glass is a promary colour you'd be much faster
using colour masks.

Cheers,Angus.

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Next message: Hilmi Ortadeveci: "OpenGL / Performer Video Texture mapping."
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