Re: [Closed REQ 5980]: Bug in PSsnap

[daemon]

Hi.  This is really more a conceptual limitation than a bug:
PSSnap draws its polygons by simple depth-sorting, choosing a sample depth
point for each polygon.  This works fine in many situations, but fails
dramatically in others.

We may eventually create a better algorithm for Postscript rendering
which chops up polygons as needed for proper depth ordering; this won't
be in the forthcoming geomview release, though.

There are two things you might try:

  - subdivide the faces of the polyhedra you have.  The depth-sorting
    algorithm is more likely to succeed when given more, smaller polygons.
    It still could fail, though.

  - Use geomview to save a screen image, then convert that to Postscript.
    This naturally produces much bulkier files, and suffers from being
    limited to screen resolution which is probably much less than
    printer resolution, but it's reliable.