SbCylinderPlaneProjector(3) on Linux
The text f0b15cde3b6f, as Debian 8 (Jessie) shipped it.
The SbCylinderPlaneProjector class projects 2D points to a half-cylinder and a plane. This projector uses a plane along with the half-cylinder of SbCylinderSectionProjector for projections. If the 2D point mapping 'misses' the cylinder section, the 3D point will be projected onto the plane.