Computational routine
eng
gensqr
subroutine gensqr(flag,nevprt,t,xd,x,nx,z,nz,tvec,ntvec,
& rpar,nrpar,ipar,nipar,u,nu,y,ny)
c Copyright INRIA
c Scicos block simulator
c Square wave generator
c period=2*rpar(1)
c
double precision t,xd(*),x(*),z(*),tvec(*),rpar(*),u(*),y(*)
integer flag,nevprt,nx,nz,ntvec,nrpar,ipar(*)
integer nipar,nu,ny
c
double precision atol,rtol,ttol,deltat
common /costol/ atol,rtol,ttol,deltat
c
if(flag.eq.2) then
z(1)=-z(1)
elseif(flag.eq.1.or.flag.eq.6) then
y(1)=z(1)
endif
end