SoTextureCoordinatePlane(3) on Linux
The text 4f60b01df413, as Debian 7 (Wheezy) shipped it.
The SoTextureCoordinatePlane class generates texture coordinates by projecting onto a plane. SoTextureCoordinatePlane is used for generating texture coordinates by projecting the object onto a texture plane. The s, t and r texture coordinates are computed as the distance from the origin to the projected point, in the respective directions. The texture plane is specified using two direction vectors, given as SoTextureCoordinatePlane::directionS and SoTextureCoordinatePlane::directionT in object space coordinates. SoTextureCoordinatePlane::directionR is used for generating the third coordinate, and can be used for generating texture coordinate for 3D textures. For 2D textures you can just leave this field alone.