b4step1.f.html
Source file:   b4step1.f
Directory:   /Users/rjl/git/rjleveque/clawpack-4.6.3/book/chap16/vctraffic
Converted:   Mon Jan 21 2013 at 20:15:34   using clawcode2html
This documentation file will not reflect any later changes in the source file.

 
c     ============================================
      subroutine b4step1(maxmx,mbc,mx,meqn,q,
     &		  xlower,dx,t,dt,maux,aux)
c     ============================================
c
c     # called from claw1 before each call to step1.
c     # use to set time-dependent aux arrays or perform other tasks
c     # which must be done every time step.
c
c
c     
      implicit double precision (a-h,o-z)
      dimension q(1-mbc:maxmx+mbc, meqn)
      dimension aux(1-mbc:maxmx+mbc, *)
      common /comlxf/ alxf

c     # coefficient needed in rp1lxf for Lax-Friedrichs:
      alxf = dx / dt
c
      return
      end