NEC-LIST:nec-2 arbitrary shape patches

Hello...

Because I ran out of ideas, I planned to add
visualization of nec-2 surface-patches.

However after (re)reading the original nec-2 manual,
I can not imagine how I should interpret the
'arbitrary shape' patches (SP 0).

I can not imagine how it is possible that when
creating a structure consisting of patches, like
the cylinder example in the nec-2 manual, it does
not make any differences what shape these patterns have.

Considered the following text from the nec-2 manual:

"Although the shape (square, rectangular, etc.) may be
used to define a patch on input it does not affect the
solution since there is no integration over the patch
unless a wire is connected to the patch center."
  
How about currents flowing from one patch (where the wire
is connected) to the other, and how to be sure all patches
are of such shape that when the complete structure is
covered no gaps exist between the patches ?

I must admit that I am not a scientific or mathematical
expert.

Maybe it is only a mathematical model, and there is no
substitution for this in the 'real' world ?

I hope, someone is able to make things more clear to me....

Arie.

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