07400325 is referenced by 12 patents and cites 17 patents.

The VPC unit and setup unit of a graphics processing subsystem perform culling operations. The VPC unit performs culling operations on geometric primitives falling within a specific criteria, such as having a property within of a numerical range limit. This limit reduces the complexity of the VPC unit. As increasing rendering complexity typically produces a large number of small primitives, the VPC unit culls many primitives despite its limitations. The VPC unit also includes a cache for storing previously processed vertices in their transformed form, along with previously computed culling information. This increases the VPC unit throughput by reducing the number of memory accesses and culling operations to be performed. The setup unit performs culling operations on any general primitive that cannot be culled by the VPC unit. By performing a first series of culling operations in the VPC unit, the processing burden on the setup unit is decreased.

Title
Culling before setup in viewport and culling unit
Application Number
10/913667
Publication Number
7400325 (B1)
Application Date
August 6, 2004
Publication Date
July 15, 2008
Inventor
Craig M Wittenbrink
Palo Alto
CA, US
Vimal Parikh
Fremont
CA, US
Christopher J Goodman
Round Rock
TX, US
Andrew D Bowen
Austin
TX, US
David C Tannenbaum
Austin
TX, US
Thomas M Ogletree
Lakeway
TX, US
Henry Packard Moreton
Woodside
CA, US
Robert W Gimby
West Bloomfield
MI, US
Agent
Townsend and Townsend and Crew
Assignee
NVIDIA Corporation
CA, US
IPC
G06T 15/40
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