X-Git-Url: http://mmka.chem.univ.gda.pl/gitweb/?a=blobdiff_plain;f=source%2Funres%2Fsrc_MD-M%2Farcos.f;h=1e355ecad7feb955e9eb2e21432b0a5829ff26f8;hb=25cf4acee8e56498ffe13a204a90853d8c415869;hp=69810ea0c66bb1053bc43099918f93b61f7a4639;hpb=478a9d9a1c99eb3f4bc4ca676ff3162bdd01d633;p=unres.git

diff --git a/source/unres/src_MD-M/arcos.f b/source/unres/src_MD-M/arcos.f
index 69810ea..1e355ec 100644
--- a/source/unres/src_MD-M/arcos.f
+++ b/source/unres/src_MD-M/arcos.f
@@ -1,8 +1,8 @@
-      FUNCTION ARCOS(X)
+      double precision FUNCTION ARCOS(X)
       implicit real*8 (a-h,o-z)
       include 'COMMON.GEO'
       IF (DABS(X).LT.1.0D0) GOTO 1
-      ARCOS=0.5D0*(PI+DSIGN(1.0D0,X)*PI)
+      ARCOS=PIPOL*(1.0d0-DSIGN(1.0D0,X))
       RETURN
     1 ARCOS=DACOS(X)
       RETURN