Computations Help

A fairly sparse control panel.

The main thing to mention is that for all the computations that require crossing 
information (knot polynomials, linking number, writhe, dowker), a projection is
of some kind is first made.  There are four options: x, y, z, and view.  The 
default is z, which is an orthographic projection to the xy plane. 

If you are currently using a perspective projection to view the knot, and have
the z projection used to compute things, it is possible that, for example, the
dowker code computed will not agree with what you think it should be from what
you see.  If you want these to agree, then select `view'.

This is of most importance to the view dependent computations, such as writhe
and dowker.  Theoretically, the projection direction shouldn't affect the knot
polynomials or the linking number.

KnotPlot calls Maple or Mathematica to compute the Alexander polynomial, and
an external program written by Bob Jenkins to compute the HOMFLY polynomial. 
Jenkins code is in the public domain and has been included in the KnotPlot
distribution in the resource/src/homfly directory.  See the README file there
for more information.

