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[Bohumir Jelinek <bohumir@xxxxxxxxx>]

This turned up to be a known bug - according to the Antennavis package
TODO file:

KNOWN BUGS:
  ...
  - I think the axes are screwed up; in trying to do multiple .nec input 
    files, something got changed, and all RF patterns are 90 degrees CW or CCW
    (I forget) from where they should be.
  ...  

Following the advice of  Joop Stakenborg and Nanakos Chrysostomos, 
I became a member of the Antennavis  group at Savannah:
  https://savannah.nongnu.org/projects/antennavis/
Savannah Antennavis repository was outdated and without maintainer.
I merged the changes from the Ubuntu and include.gr Antennavis repositories into the Savannah version.

I kept the original, Savannah version of "Models/*.nec" files,  since
the  new model files (i.e. ubuntu/include.gr) have comma delimited
values - that seems not-standard.

I am open to suggestions for Antennavis improvement.

-Bohumir

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https://bugs.launchpad.net/bugs/1083301

Title:
  wrong vis. routine: single dipole no rotational symmetry

Status in “antennavis” package in Ubuntu:
  New

Bug description:
  Dear Antennavis maintainers,

  I am Bohumir, co-author of http://yagi-logper.sourceforge.net/.
  Thanks for maintaining antennavis package. I am fond of antennavis.

  I believe I found a small bug in the antennavis visualization routines.
  It appears, for example, when you give Antennavis a single dipole as input, as
  attached. Result should be a rotationally symmetric around the axis of
  the dipole, but it is not.

  Following three lines, in PlotPoint() function, VisField.c file are
  wrong:

     glRotatef(azimuth, 0.0, 1.0, 0.0);
     glRotatef(elevation, 1.0, 0.0, 0.0);
     glTranslatef(0.0, 0.0, dist * POINT_DIST_SCALE);

  They should be replaced by:

     glRotatef(elevation, 0.0, 1.0, 0.0);
     glRotatef(azimuth, 0.0, 0.0, -1.0);
     glTranslatef(0.0, dist * POINT_DIST_SCALE, 0.0);

  The above change will fix the problem.

  I would be very glad if you can implement the above change.
  I can supply it in a form of patch if needed.

  Best,
  -Bohumir
    http://www.cavs.msstate.edu/directory/information.php?eid=69

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