__________________________________________________________________________
(app-e) APPENDIX E: OPENGL ENVIRONMENT VARIABLE SETTINGS
__________________________________________________________________________
FULL SCENE ANTI-ALIASING
Anti-aliasing is a technique used to smooth the edges of objects in a
scene to reduce the jagged "stairstep" effect that sometimes appears.
Full scene anti-aliasing is supported on GeForce or newer hardware.
By setting the appropriate environment variable, you can enable full
scene anti-aliasing in any OpenGL application on these GPUs.
Several anti-aliasing 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 their effect 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
__GL_FSAA_MODE GeForce4 MX, Quadro4 500/550 XGL, and
Quadro4 200/400 NVS
-----------------------------------------------------------------------
0 FSAA disabled
1 2x Bilinear Multisampling
2 2x Quincunx Multisampling
3 FSAA disabled
4 2 x 2 Supersampling
5 FSAA disabled
__GL_FSAA_MODE GeForce3, Quadro DCC, GeForce4 Ti, Quadro4 700 XGL,
Quadro4 750 XGL, and Quadro4 900 XGL
-----------------------------------------------------------------------
0 FSAA disabled
1 2x Bilinear Multisampling
2 2x Quincunx Multisampling
3 FSAA disabled
4 4x Bilinear Multisampling
5 4x Gaussian Multisampling
Please note that to use FSAA on Quadro-family products, you must disable
UBB (please see APPENDIX M: PAGE FLIPPING, WINDOW FLIPPING, AND UBB
for details).
|