c: COORDINATION GROUPA=1-108 SWITCH={COSINUS D_0=0.1 R_0=0.1}
d: COORDINATION GROUPA=1-108 SWITCH={CUSTOM FUNC=step(x)*0.5*(cos(x*pi)+1)+step(-x)*1.0 R_0=0.1 D_0=0.1 D_MAX=0.2}
PRINT ARG=c,d FILE=colvar FMT=%8.4f STRIDE=1
FLUSH STRIDE=1
s: COMBINE ARG=c,d COEFFICIENTS=1,1 PERIODIC=NO
RESTRAINT ARG=s KAPPA=0 SLOPE=1 AT=0
