Cg issues on NVidia hardware

[dingobloo@…]

Migrated from SFbug:1435959.

Original description:

CPU: AMD 38000
GPU: nVidia 7800
Driver version: 81.98
OS: WindowsXP
CS Version: CVS (0.99)
Compiler: MSVC++ 8.0 Express Edition

Nvidia hardware exhibits the following known symptoms when utilising the default cg profile:

- incorrect portals 
- disco terrain
- incorrect point sprites

All but the point sprites are remedied when forcing the arbvp1 and arbfp1 profiles on those shaders, specifically std_lighting. Unfortunatly forcing the arb profiles could remove enhancements provided by the default nVidia profile.

Original comments:

Date: 2006-04-28 10:20
Sender: jorrit
Logged In: YES 
user_id=1703

Frank, I think this is something for you. Right?

Date: 2006-02-28 13:42
Sender: jorrit
Logged In: YES 
user_id=1703

I added the workarounds to CVS so that people stop
complaining about it. The bug remains valid though as the
real bug still has to be fixed.

Date: 2006-02-24 13:48
Sender: dingobloo
Logged In: YES 
user_id=685226

If you need to work around this issue temporarily, attached
is a modified copy of
cs/data/shader/snippets/std_lighting-pass.inc that will work.

Additionally, a work around is available for point-sprites
in the form of a modified
cs/data/shader/snippets/std_lighting.cscg

[res]

Possibly the same as #18.

[res]

Disco terrain: vknecht says he doesn't get it any more. (6600GT, driver 87.62)

[res]

Replying to res:

(6600GT, driver 87.62)

Linux.

[jorrit]

Is this still relevant?

[res]

Replying to jorrit:

Is this still relevant?

At least I don't recall that any of these issues came up recently...

[res]

IIRC the last issue was that the mixmode alpha was not passed to the shader correctly. Should be remedied by r28886.