SoTextureCoordinatePlane(3) on Linux
The text 4b2d572bb098, as Debian 4.0 (Etch) shipped it.
The SoTextureCoordinatePlane class generates texture coordinates by projecting onto a plane. The plane is specified using two direction vectors: directionS and directionT. The S and T texture coordinates are computed as the distance from the origin to the projected point, in the respective directions.