Re: [GtkGLExt] Enable antialiasing in glChess

[Mitchell Laks <mlaks post harvard edu>]

On 13:03 Wed 13 Jun     , Stéphane Brunet wrote:
> Hi,
> 
> I did have a quick look at FSAA yesterday but I couln't find any 
> specific information yet on how to enable it in linux programs. Actually 
> there are options in the Nvidia/Ati control panels but that's all what I 
> found.
> 
> If you find answers to your questions, share it with us. I'm interested 
> in knowing how to do FSAA on linux :-)
 
> Stéphane
> 

have a look at  this page

http://us.download.nvidia.com/XFree86/Linux-x86/1.0-9755/README/appendix-e.html

Appendix E. OpenGL Environment Variable Settings
Full scene antialiasing

Antialiasing is a technique used to smooth the edges of objects in a scene to reduce the jagged "stairstep" effect that sometimes appears. Full-scene antialiasing is supported on GeForce or newer hardware. By setting the appropriate environment variable, you can enable full-scene antialiasing in any OpenGL application on these GPUs.

Several antialiasing methods are available and you can select between them by setting the __GL_FSAA_MODE environment variable appropriately. Note that increasing the number of samples taken during FSAA rendering may decrease performance.

The following tables describe the possible values for __GL_FSAA_MODE and the effects that they have on various NVIDIA GPUs.

__GL_FSAA_MODE 	GeForce, GeForce2, Quadro, and Quadro2 Pro
0 	FSAA disabled
1 	FSAA disabled
2 	FSAA disabled
3 	1.5 x 1.5 Supersampling
4 	2 x 2 Supersampling
5 	FSAA disabled
6 	FSAA disabled
7 	FSAA disabled

__GL_FSAA_MODE 	GeForce4 MX, GeForce4 4xx Go, Quadro4 380,550,580 XGL, and Quadro4 NVS
0 	FSAA disabled
1 	2x Bilinear Multisampling
2 	2x Quincunx Multisampling
3 	FSAA disabled
4 	2 x 2 Supersampling
5 	FSAA disabled
6 	FSAA disabled
7 	FSAA disabled

__GL_FSAA_MODE 	GeForce3, Quadro DCC, GeForce4 Ti, GeForce4 4200 Go, and Quadro4 700,750,780,900,980 XGL
0 	FSAA disabled
1 	2x Bilinear Multisampling
2 	2x Quincunx Multisampling
3 	FSAA disabled
4 	4x Bilinear Multisampling
5 	4x Gaussian Multisampling
6 	2x Bilinear Multisampling by 4x Supersampling
7 	FSAA disabled

__GL_FSAA_MODE 	GeForce FX, GeForce 6xxx, GeForce 7xxx, Quadro FX
0 	FSAA disabled
1 	2x Bilinear Multisampling
2 	2x Quincunx Multisampling
3 	FSAA disabled
4 	4x Bilinear Multisampling
5 	4x Gaussian Multisampling
6 	2x Bilinear Multisampling by 4x Supersampling
7 	4x Bilinear Multisampling by 4x Supersampling
8 	4x Bilinear Multisampling by 2x Supersampling (available on GeForce FX and later GPUs; not available on Quadro GPUs)

__GL_FSAA_MODE 	GeForce 8xxx, G8xGL
0 	FSAA disabled
1 	2x Bilinear Multisampling
2 	FSAA disabled
3 	FSAA disabled
4 	4x Bilinear Multisampling
5 	FSAA disabled
6 	FSAA disabled
7 	4x Bilinear Multisampling by 4x Supersampling
8 	FSAA disabled
9 	8x Bilinear Multisampling
10 	8x
11 	16x
12 	16xQ
13 	8x Bilinear Multisampling by 4x Supersampling


Could you try setting that variable, recompiling
 and report back what you find?

thanks,

Mitchell Laks