SGI Windows NT Toolbox

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Occlusion culling on the Visual Workstations


System:   any Category:   graphics Last Modified:   2/22/99
OS version:   NT 4.0 Product:   OpenGL Service Pack:  
Description

What is the OpenGL occlusion culling extension? Do the Silicon Graphics 320 and Silicon Graphics 540 workstations support it?

Problem Resolution

Occlusion culling is an OpenGL optimization that allows the application programmer to send a bounding box to the graphics hardware in order to determine if any pixels within the volume are visible. Both the Silicon Graphics 320 and the Silicon Graphics 540 support this extension in OpenGL.

Occlusion culling support is provided through the following OpenGL extensions:

EXT_depth_pass_instrument

SGIX_instruments

Please see "Occlusion Test" in the online documentation contained in the Silicon Graphics OpenGL SDK, for details:

"OpenGL Programming Guide for Silicon Graphics Windows NT Visual Workstation"; in section: "Additional Optimizations".

For more details, or to download the SDK, see:

http://www.sgi.com/developers/nt/sdk


Send comments on this case to kbase@sgi.com.


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