5 subroutine b4step2(mbc,mx,my,meqn,q,xlower,ylower,dx,dy,t,dt,maux,aux)
9 integer,
intent(in) :: mbc,mx,my,meqn,maux
10 real(kind=8),
intent(in) :: xlower,ylower,dx,dy,t,dt
11 real(kind=8),
intent(inout) :: q(meqn,1-mbc:mx+mbc,1-mbc:my+mbc)
12 real(kind=8),
intent(inout) :: aux(maux,1-mbc:mx+mbc,1-mbc:my+mbc)
subroutine b4step2(mbc, mx, my, meqn, q, xlower, ylower, dx, dy, t, dt, maux, aux)
Called before each call to step2.