On Feb 19, 2008, at 3:37 AM, Alex Drinkwater wrote:
I know I've mentioned this a couple of times, but I'd
really like a definitive answer on this one.
Multi-pass GLSL shaders in Quartz Composer:
possible/not possible?
possible in a future release/never going to happen?
The GLSL patch only supports single-pass shaders currently.
An experiment to try (if the 2nd+ passes are all fragment ops) would
be to break down your shader by pass, put the GLSL shader patch into a
Render in Image patch for the first pass, and feed that texture to
another GLSL patch for the 2nd pass, and so on.
A feature request to support multi-pass shaders would be completely
reasonable.
Post it (with details of your usage case) to http://bugreporter.apple.com/
Allan
___________
Allan Schaffer
Graphics Evangelist
Worldwide Developer Relations
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