Retrieves the coordinates of a projection in the projection plane, given the parallelogram coordinates of a point (for use with selected TDPACK routines).
Available in version 4.3.1 and later.
function tdprpa ( xyipa  : float ) return_val  : float
A float array of 2 elements defining the parallelogram coordinates of a point.
A float array of two elements containing the coordinates of the projection of the point in the projection plane.
This function 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 TDPRPA for a full description of this function.
No examples are currently available for this function. Please see the documentation on TDPRPA for more information about this function.