Hi all,
I'm trying to use MIT-scheme to play with the picture language in SICP. I
am aware that there's an implementation in Racket that works well and is
still maintained, but I just wanted to see if I can use the picture
language in MIT-scheme.
The book's website [1] gives the "primitive painter" support files for the
picture language, and one of the files is prmpnt.scm. One problematic line
in that file is this:
(define floating-vector-ref
(access floating-vector-ref
(->environment '(student pictures))))
The "student pictures" part probably indicates an environment that a
special 6.001 version of MIT-scheme provided. I left MIT less than a year
ago, so I'm still able to ssh into my Athena account; I did `add 6.001`,
and looked in the Athena locker at `/mit/6.001`, and was not able to find
any true definitions of the floating-vector-ref function.
There was a post [2] in mit-scheme-users from 2005 with someone having the
same problem, but they never posted the actual solution.
Does anyone know how to get the primitive painter from [1] working?
best,
David (PhD '15 course 8)
[1]
https://mitpress.mit.edu/sites/default/files/sicp/psets/ps4hnd/readme.html
[2]
https://lists.defectivebydesign.org/archive/html/mit-scheme-users/2005-03/msg00000.html
