Question in Axisym. Problems in Postprocessor

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David:
First of all, thanks for providing the FEMM program and it's source 
code. It's really help me a lot and save many times for me in my work 
in solving 2D electro-magnetic problems.
Could you give me a more detail description on how to interpolate 
the potential in axi case. And how to get element's B value where it 
is near the axi and the equations you used(because I can't got the 
references you listed in the User Mannual). Thank you.

Anyway here are two suggestions that maybe help FEMM get more 
efficient in use:
(1) In postprocessor view you can try to use the virtual window 
replace redraw the window. Just use win32 API function BitBlt() after 
draw all items in the window. In WM_PAINT message handler use BitBlt
() again to restore the items without addtional job. This will avoid 
a long wating time while redraw the windows.
(2) In postprocessor Line Integral. It will take a long time when I 
try to get a Force or Torgue result from a contour when the mesh size 
is big. I think it was a point loction problem. There have some 
algorithms for efficient point location[1][2]. If possible, I can 
write a function for you for FEMM to solve the efficient point 
loction problem.

[1] E.P.Mucke, Isaac Saias, Binhai Zhu, Fast Randomized Point 
Location Without Preprocessing in Two- and Three-dimension Delaunay 
Triangulations. In Proceedings of the 12th Annual Symposium on 
Computational Geometry,1996. 
[2] L.J.Guibas abd J.Stolfi. Primitives for the Manipulation of 
General Subdivisions and the Computation of Voronoi Diagrams. 
Transactions on Graphics,4(2):74-123.

si hang