On Sat, Oct 9, 2010 at 4:57 PM, Stuart Buchanan <stuar...@gmail.com> wrote:
> On Sat, Oct 9, 2010 at 7:02 PM, Gary Carvell wrote:
>> FWIW, I have Material Shaders enabled in the Rendering Options dialog
>> - otherwise the 3D clouds disappear completely. So it seems like at
>> least some shader functionality is working. But the individual shader
>> options such as Crop Texture, Water Reflection, etc. don't seem to do
>> anything. Toggling them  doesn't affect the display in any obvious
>> way.
>
> What happens when you move the quality slider to the right? Does
> this have any effect on the crop shaders etc.?

The quality slider didn't have any effect that I could see. Sounds
like there is definitely something going on with the shaders.

>
> It very much sounds like your graphics card is no-longer performing
> any shader effects. Why that should be the case, I don't know.

I poked around and found Typhoon Labs' Shader Designer app which runs
on Linux. From trying some sample vertex / fragment shaders it looks
like my system supports up to version 120 for both. The FG shader
files are all tagged at #version 120 so that's good.

I loaded several of FG's fragment and vertex shaders into Shader
Designer. Some of them seemed to run, maybe - kind of hard to tell.
The tree shaders produced some funky sparse black mesh patterns. Some
small example shaders I got off the Net ran ok.

So at least the card / open source driver look like they're *capable*
of running shaders. Of course it's a long distance from that, to
actually running real shaders in a real app. Reminds me of when I
tried to learn OpenGL programming - it was such an achievement when my
little program displayed anything at all besides a black rectangle.

>
> I don't see anything in the FlightGear log and I don't have enough
> experience parsing X server logs to diagnose the root cause.
>
> Sorry I can't be of more help.
>
> -Stuart

No problem. I really appreciate you, Thorsten and Arnt taking a look.
Will keep poking around on my end.

>
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Beautiful is writing same markup. Internet Explorer 9 supports
standards for HTML5, CSS3, SVG 1.1,  ECMAScript5, and DOM L2 & L3.
Spend less time writing and  rewriting code and more time creating great
experiences on the web. Be a part of the beta today.
http://p.sf.net/sfu/beautyoftheweb
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