Draws the projection of a line joining two points in the reference parallelogram (for use with selected TDPACK routines).
Available in version 4.3.1 and later.
procedure tdlnpa ( wks  : graphic, uvw1  : float, uvw2  : float )
Float arrays of 2 elements each specifying the first and second parallelogram coordinates in the reference parallelogram.
This routine 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 TDLNPA for a full description of this procedure.
No examples are available for this function currently. Please see the documentation on TDLNPA for more information about this function.