On May 7, 2008, at 2:27 AM, carolineagle wrote:
> i have add the following commands in the .ctl file
> (print "The modal volume is:"
> (meep-fields-total-volume fields))
>
> however, i can just get this:
> The modal volume is:#<collectable-swig-pointer
> meep::geometric_volume * 1f2c160>
>
> what does it mean? Is there any thing wrong with the command I wrote?
Yes, you shouldn't be using total-volume, you should be using modal-
volume, as in:
(meep-fields-modal-volume-in-box fields (meep-fields-total-volume
fields))
meep-fields-total-volume returns a volume object specifying a region
of space -- in this case, the total volume of the computational cell.
meep-fields-modal-volume-in-box takes a region of space (a "box") and
computes the "modal volume" (returning a number) as defined
appropriate for the Purcell effect, i.e. the integral of the electric-
field energy density divided by the maximum energy density in the box.
Steven
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