qinit.f.html | ![]() |
Source file: qinit.f | |
Directory: /Users/rjl/git/rjleveque/clawpack-4.6.3/book/chap21/corner | |
Converted: Mon Jan 21 2013 at 20:15:38 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 # Sample scalar equation with data that is piecewise constant with c # p = 1.0 if 0.1 < x < 0.6 and 0.1 < y < 0.6 c # 0.0 otherwise c implicit double precision (a-h,o-z) dimension q(1-mbc:maxmx+mbc, 1-mbc:maxmy+mbc, meqn) c do 20 i=1,mx xi = xlower + (i-0.5d0)*dx do 20 j=1,my yj = ylower + (j-0.5d0)*dy if (xi .gt. -0.35d0 .and. xi.lt.-0.2d0) then q(i,j,1) = 1.d0 else q(i,j,1) = 0.d0 endif q(i,j,2) = q(i,j,1) q(i,j,3) = 0.d0 20 continue return end