concentric circles with transparent centre

Alex Koudrin <[email protected]>
Newsgroups gmane.comp.graphics.ipe.general
Message-ID <CADSnAxtY6GO3v3F_ipFUt5_s-ayikiAaoHT3zstbz1_PKvWGJg@mail.gmail.com>
Hi Ipe users,

I'd like to draw two concentric circles and I would like to have the
inner-most circle to have no fill/be transparent representing a hole. The
area between the inner and outer circle is filled with black. Think of a
washer (as related to nut and bolt) then you have it right.

At the moment, the only way I do this is by filling the inner circle with
white and filling the outer circle with black. That's normally fine, but I
have a case where I need to put the image on a coloured background with the
expectation that you would see the background through the inner circle
hole. Is there a way to do this in Ipe? Note that this is in latex through
ps so opacity probably can't be used.

Any suggestions appreciated!
Alex

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