qinit.f.html CLAWPACK  
 Source file:   qinit.f
 Directory:   /Users/rjl/clawpack_src/clawpack_master/apps/fvmbook/chap11/burgers
 Converted:   Sat Mar 23 2024 at 11:04:32   using clawcode2html
 This documentation file will not reflect any later changes in the source file. 

 
c
c
c =========================================================
       subroutine qinit(meqn,mbc,mx,xlower,dx,q,maux,aux)
c =========================================================
c
c     # Set initial conditions for q.
c
      implicit double precision (a-h,o-z)
      dimension q(meqn,1-mbc:mx+mbc)
      dimension aux(maux,1-mbc:mx+mbc)
c
c
      pi = 4.d0*datan(1.0d0)
      do 150 i=1,mx
         xcell = xlower + (i-0.5d0)*dx
         q(1,i) = 0.d0
         if (xcell .gt. -pi .and. xcell .lt. pi) then
           q(1,i) = 2.0d0*dsin(3.d0*xcell) + (dcos(2.d0*xcell)+0.2d0)
           q(1,i) = q(1,i) * (dcos(xcell)+1.d0)
           endif
  150    continue
c
      return
      end