The segfault seems to be caused by a misplaced paren in
(define (nap-transform-point transform point) (receive (a b c d e f) (unpack6 transform) (receive (x y) (unpack2 point) (list (dot (row1 a b c d e f) (xyz x y)) (dot (row2 a b c d e f) (xyz x y))))))
(this is the corrected version - the previous code has an additional close at the end of the line with the second receive).
I would still appreciate comments on whether this is a reasonable approach.
Thanks, Andrew
Hi,
Well, first of all this segfaults: qp6 napito: ./napito-base.scm Segmentation fault which I guess is a bug.
But also, I got a bit carried away trying to remove function calls in matrix multiplication. I'd appreciate some advice - if the code worked, would it be efficient? In particular, do the values/receive pairs get "compiled away"?
I hope the code is fairly obvious - I'm trying to unpack a list with contains the non-zero elements from a typical 2D geometric transform and then do the matrix multiplication on a point.
Thanks, Andrew
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