subroutine sawtth(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
double precision t,xd(*),x(*),z(*),tvec(*),rpar(*),u(*),y(*)
integer flag,nevprt,nx,nz,ntvec,nrpar,ipar(*)
integer nipar,nu,ny
c
c
if (flag.eq.1.and.nevprt.eq.0) then
y(1)=t-z(1)
elseif (flag.eq.1.and.nevprt.eq.1) then
y(1)=0.0d0
elseif (flag.eq.2.and.nevprt.eq.1) then
z(1)=t
elseif (flag.eq.4) then
z(1)=0.0d0
endif
return
end