X-Git-Url: http://mmka.chem.univ.gda.pl/gitweb/?p=unres.git;a=blobdiff_plain;f=source%2Fcluster%2Funres%2Fsrc%2Farcos.f;h=f054118a1022be3f84f9a3a80bc64c15caebfbc7;hp=052a1e4b541287f30debba0e0051fa92b63b3267;hb=6f521277aa2a382d409f5189957283b0998b0d07;hpb=c44fbf8cc1fb0b430dc5c68b9bc63582b2708be4

diff --git a/source/cluster/unres/src/arcos.f b/source/cluster/unres/src/arcos.f
index 052a1e4..f054118 100644
--- a/source/cluster/unres/src/arcos.f
+++ b/source/cluster/unres/src/arcos.f
@@ -2,7 +2,7 @@
       implicit real*8 (a-h,o-z)
       include 'COMMON.GEO'
       IF (DABS(X).LT.1.0D0) GOTO 1
-      ARCOS=0.5D0*(PI+DSIGN(X,1.0D0)*PI)
+      ARCOS=PIPOL*(1.0d0-DSIGN(1.0D0,X))
       RETURN
     1 ARCOS=DACOS(X)
       RETURN