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BasKuenen
10-20-2000, 04:35 PM
I'm using texture mapping with fog, and the clipped polygons are distorted. I've tried all things I could think of, but the combination FOG-TEXTURE-CLIPPING always gives me this:
http://baskuenen.cfxweb.net/images/lserr2.jpg
BasKuenen
10-20-2000, 07:37 PM
To make it more clear, I outlined the error in this picture:
http://baskuenen.myweb.nl/images/lserr2_.jpg


You can download a demo: http://baskuenen.myweb.nl/downloads/fstscape.zip (only 268K download)
mcraighead
10-20-2000, 09:42 PM
Kind of off-topic for this forum...

I ran it on my development system with a GeForce 256 and it works fine.

What are you using?

- Matt
BasKuenen
10-20-2000, 10:45 PM
Yes maybe you're right, and it is a bit off-topic. But it looks like a bug to me. I've tried almost everything I could think of - but the "bug" is still there. I've tested it with multiple applications. A lot of different settings. I just can't seem to get rid of it, and nobody can explain it http://www.opengl.org/discussion_boards/ubb/frown.gif

I don't have a 3D card, so I use software rendering. (I know it's slow - but this is not my problem)

Do you get the bug if you don't use your 3D card?
mcraighead
10-21-2000, 09:37 AM
Nope, actually, if I run with the MS SW renderer, it works fine there too.

- Matt
BasKuenen
10-21-2000, 04:11 PM
I downloaded a new opengl32.dll, but this didn't help. Can it possibly be the driver of my 2D video card. Seems very unlikely to me!

Please Help...I think I'm getting a bit desperate about this...
Humus
10-22-2000, 05:11 AM
It works great for me too on my Radeon 64MB vivo.
BasKuenen
10-22-2000, 11:00 AM
I FOUND IT !!! http://www.opengl.org/discussion_boards/ubb/smile.gif

It happens when I'm using 24bit colours!
All is oke when I use 16bit, but 24bit is nicer...

I hope some OpenGL guys can fix this...
BasKuenen
10-22-2000, 11:29 AM
Does somebody know where I can report this bug? I've looked around for a good email address, but couldn't find a good bugfix email address...
fenris
10-22-2000, 12:39 PM
You can report it to the vendor built your OpenGL drivers (more than likely the company that made your card or chipset). This is a bug in the OpenGL implementation for your drivers, not OpenGL itself.
BasKuenen
10-29-2000, 12:03 PM
I tested 8bit colour and this also renders with this "distortion".

I really believe this is an OGL (software rendering) bug - not a card problem!
This error is on polygons. These are all rendered before send to the 2D card.