Hi,
I hope the author of the SICP package is on this email list. I have encountered
this problem doing affine transformation of the picture:
(paint ((transform-painter (make-vect 0 0) (make-vect 0.5 0.1) (make-vect 0
0.5)) einstein))
. .
../../../../../../Library/Racket/planet/300/6.1/cache/soegaard/sicp.plt/2/1/prmpnt.scm:376:12:
vector-ref: contract violation
expected: vector?
given: 0
argument position: 1st
other arguments...:
2
If edge-2 vector is changed to (0 1), there is no problem:
(paint ((transform-painter (make-vect 0 0) (make-vect 0.5 0.1) (make-vect 0 1))
einstein))
Cheers,
Alexey
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