On 08/03/2012 11:59 AM, Doug Williams wrote:
(require plot)(plot (contour-intervals (lambda (x y) (define z (- x y)) (cond ((< z -1) -1) ((> z 1) 1) (else z))) -2 2 -2 2)) ... Why is the lower white triangle not colored red - they definitely have a value of 1? It's like those points are completely ignored.
Turns out it was an error in the marching squares (intervals) implementation: a `<' should have been a `<=' to make an upper test symmetric with the corresponding lower test.
I've pushed the fix. Thanks again! Neil ⊥ _________________________ Racket Developers list: http://lists.racket-lang.org/dev
