[Fluxus] getting wire-colour

[Kassen]

Dear list,

Suppose we have a primitive p (without a "hint-vertcols" or similar set) and
we'd like to know its colour.

(with-primitive p (pdata-ref "c" 0))

...should do the trick. Now suppose we'd like to know the set wire-colour. I
don't think we can, yet I'd like to be able to get the wire-colour of a
given primitive, so I could do stuff like fading out wire-frame objects. Am
I missing something? Could/should this be added?

Yours,
Kas.
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