Not yet implemented.
procedure tdcudp ( )
This routine (not yet implemented) is part of the low-level TDPACK package, which is a group of Fortran and C callable routines for projecting objects from a 3-dimensional coordinate system having U, V, and W axes to a 2-dimensional projection plane having X and Y axes and/or for drawing the projections of those objects. This can be referred to somewhat loosely as "drawing objects in three dimensions".
Please see the documentation on TDCUDP for a full description of this procedure.