[Radiance-general] falsecolor and specific isocontours

[Rob Guglielmetti]

> Hi Chris,
>
> No, falsecolor doesn't offer such an option.  However, you can do it
> yourself with pcomb:
>
> 	pcomb -e 'incontr=eq(we*li(1),16.5,0.25)' \
> 		-e 'ro=if(incontr,0,ri(1)' \
> 		-e 'go=if(incontr,1,gi(1)' \
> 		-e 'bo=if(incontr,0,bi(1)' \
> 		-e 'and(a,b):if(a,b,a)' \
> 		-e 'eq(a,b,eps):and(a-b+eps,b-a+eps)' \
> 		-o input.pic > contoured.pic
>

Hey, this is cool Greg.  I figured this was possible with pcomb, but not
really having any handle on the functional language I never knew how to go
about it.  I tried your tip here, putting the whole thing into a shell
script, but I get an error: "we: undefined variable".  Is there something
wrong with my environment (aside from going into New York City on a
perpetually late, crowded train every day, I mean)?

P.S. There are closing parens missing from lines 2,3,and 4.

- Rob Guglielmetti
www.rumblestrip.org