Vector plots + "zoomier"

[David Meeker <dmeeker@xxxxxxxx>]

I've put up patched versions of femme.exe, femmview.exe, beladraw.exe, 
and belaview.exe at:

http://groups.yahoo.com/group/femm/files/patch.zip

These modified versions implement vector plots of the fields (push the 
new arrow button on the tool bar of femmview or belaview), and they are 
also modified so that the view can be zoomed in to better than one 
millionth of the full-scale geometry, rather than only about one eightieth.

The vectors are just plotted on the grid points at even spacing--you can 
make more arrows by changing the grid settings. I'd been thinking about 
plotting arrowheads on the flux lines or something, but it was a lot 
easier to just put arrows at evenly spaced grid points. The arrows are 
scaled by default so that the biggest field corresponds to an arrow that 
is the same length as the current grid spacing. In the edit box that 
you get when you press the arrow icon, you can change the relative 
scaling. The program plots the vectors on an element-by-element basis, 
so that multiple arrows will get plotted at locations where the field is 
multi-valued (e.g. interfaces between different materials and corners). 
There are preference settings for the vector plots so that you can have 
these plots on or off by default, and so that you can change the color 
of the arrows.

These changes aren't yet incorporated into the release versions 
available from the website at http://femm.berlios.de -- I'll include 
these changes to the release versions after I've had a chance get some 
feedback.

Dave.
--
David Meeker
email: dmeeker@xxxxxxxx
www: http://femm.berlios.de/dmeeker