[Radiance-general] arguments to function file constant

[Stephen Wasilewski]

As I understand function files: lines with colons are defined once upon
loading the func file and lines with equal signs are calculated for every
intersecting ray.  Is there a way to pass an argument from my material
(A1,A2 etc.) to a constant?  if I try something like this:

darea : A3^2*PI;

I get this error:
rvu: internal - arg(n) called without a modifier context

but this:
darea = A3^2*PI;

runs fine.

Although perhaps my first question should be:  does this make a difference
in the calculation time?

Thanks,

Stephen Wasilewski
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