SbDPViewVolume(3) on Linux
The text a5b274a9c5bb, as Debian 7 (Wheezy) shipped it.
The SbDPViewVolume class is a double precision viewing volume in 3D space. This class contains the necessary information for storing a view volume. It has methods for projection of primitives from or into the 3D volume, doing camera transforms, view volume transforms etc.