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matrix-(cos-)-angle: correctly check for infinity #101

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Merged
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Feb 7, 2025
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matrix-(cos-)-angle: correctly check for infinity #101

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4 changes: 2 additions & 2 deletions math-lib/math/private/matrix/matrix-basic.rkt
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Original file line number Diff line number Diff line change
Expand Up @@ -312,7 +312,7 @@
(define matrix-cos-angle
(let ()
(define (mag² [x : Number]) (if (real? x) (sqr x) (+ (sqr (real-part x)) (sqr (imag-part x)))))
(define (inf=>1 [x : Real]) : Flonum (if (eq? x +inf.0) 1. (if (eq? x -inf.0) -1. 0.)))
(define (inf=>1 [x : Real]) : Flonum (if (eqv? x +inf.0) 1. (if (eqv? x -inf.0) -1. 0.)))
(: cinf=>1 (case-> (-> Real Flonum)
(-> Float-Complex Float-Complex)
(-> Number Number)))
Expand Down Expand Up @@ -374,7 +374,7 @@
(cond
[(flonum? ca) (flacos ca)]
[(real? ca)
(if (eq? ca 1) 0 (flacos (fl ca)))]
(if (eqv? ca 1) 0 (flacos (fl ca)))]
[else (acos ca)]))

(: matrix-normalize
Expand Down