qinit.f.html CLAWPACK  
 Source file:   qinit.f
 Directory:   /home/rjl/git/rjleveque/clawpack-4.x/book/chap22/corner
 Converted:   Tue Jul 26 2011 at 12:59:03   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