X-Git-Url: https://git.jsancho.org/?a=blobdiff_plain;f=src%2Fgacela_misc.scm;h=9dc10aa6c9140dec198ca4d9079c001c0c55871d;hb=e99551161b1199fcd068dce0f7b0fd2f3927e771;hp=42c8841f7e0bf132848a09eab5a5b315b1f91a58;hpb=ef93ec59bb8aef38efdace21f86da55e2dc7cd6d;p=gacela.git

diff --git a/src/gacela_misc.scm b/src/gacela_misc.scm
index 42c8841..9dc10aa 100644
--- a/src/gacela_misc.scm
+++ b/src/gacela_misc.scm
@@ -21,6 +21,11 @@
 (use-modules (srfi srfi-1))
 
 
+;;; Constants
+
+(define *pi* (* (asin 1) 2))
+
+
 ;;; Functions
 
 (define (nearest-power-of-two n)
@@ -29,6 +34,12 @@
 	  (else (power (* p 2) n))))
   (power 1 n))
 
+(define (degrees-to-radians angle)
+  (/ (* angle *pi*) 180))
+
+(define (radians-to-degrees angle)
+  (/ (* angle 180) *pi*))
+
 (define-macro (pushnew elem list)
   `(cond ((not (find (lambda (e) (eq? e ,elem)) ,list))
 	  (set! ,list (cons ,elem ,list)))))