New Features in This Guide
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## New Features in This Guide

This revision of the guide documents OpenGL Performer 3.1, which has the following features:

- GPU programming on systems like Silicon Graphics Onyx4 UltimateVision visualization systems

- Curves and surfaces (higher-order primitives)
  - Parametric surfaces
  - Subdivision surfaces

- pfGeoArrays for efficient use of vertex arrays on systems like Silicon Graphics Onyx4 UltimateVision visualization systems

- New data sources
  - Maya exporter to OpenGL Performer
  - CATIA import to OpenGL Performer

- Miscellaneous
  - Small object culling
  - Linux: RedHat 8 support
  - Linux: RedHat 9 support
  - IRIX: Remove O32 support
  - Linux: Remove `gcc2` support

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