qinit.f.html Source file:   qinit.f Directory:   /Users/rjl/git/rjleveque/clawpack-4.6.3/book/chap22/corner Converted:   Mon Jan 21 2013 at 20:15:41   using clawcode2html This documentation file will not reflect any later changes in the source file.

```

c
c
c
c     =====================================================
subroutine qinit(maxmx,maxmy,meqn,mbc,mx,my,xlower,ylower,
&                   dx,dy,q,maux,aux)
c     =====================================================
c
c     # Set initial conditions for q.
c
implicit double precision (a-h,o-z)
dimension q(1-mbc:maxmx+mbc, 1-mbc:maxmy+mbc, meqn)
dimension aux(1-mbc:maxmx+mbc, 1-mbc:maxmy+mbc, maux)
common /comaux/ rho1,amu1,alam1,rho2,amu2,alam2
c
cp2 = dsqrt((alam2+2.d0*amu2)/rho2)
do 20 i=1,mx
xi = xlower + (i-0.5d0)*dx
do 20 j=1,my
yj = ylower + (j-0.5d0)*dy
q(i,j,1) = 0.d0
q(i,j,2) = 0.d0
q(i,j,3) = 0.d0
q(i,j,4) = 0.d0
q(i,j,5) = 0.d0
if (xi .gt. -0.35d0 .and. xi.lt.-0.2d0) then
c                # set to be an eigenvector corresponding to right-going
c                # P-wave:
q(i,j,1) = aux(i,j,2) + 2.d0*aux(i,j,3)
q(i,j,2) = aux(i,j,2)
q(i,j,4) = -aux(i,j,4)
endif
20         continue
return
end
```