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setuse.f.html |
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Source file: setuse.f
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Directory: /Users/rjl/git/rjleveque/clawpack-4.6.2/amrclaw/2d/lib
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Converted: Wed May 30 2012 at 13:01:30
using clawcode2html
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This documentation file will
not reflect any later changes in the source file.
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c
c ----------------------------------------------------------------
c
subroutine setuse(listbc,maxsp,ispot,mkid,
1 ilo, ihi, jlo, jhi,
2 iclo,ichi,jclo,jchi,kflag)
c
c :::::::::::::::::::::::: SETUSE ::::::::::::::::::::::::::::::::
c
c set up boundary list for coarse grid, to be used by fluxsv.
c loop around boundary of fine grids to do this. each entry has
c i, j, side #, fine grid #, loc in fine grid list for fluxes.
c for example, side 1 of fine grid fixes side 3 of coarse grid,
c so coarse grid list will store the # 3.
c wrt coarse grid, the sides are:
c 2
c 1 3 that is, right edge of a coarse cell = 3
c 4 top edge of a coarse cell = 2
c
c # lkid is the index into the fine grid's saved fluxes.
c # the fine grid will save all its fluxes all around its
c # perimeter. lkid tells where the coarse grid should
c # taking them from. (no ghost cells in this index, but
c # it is 1-based for indexing array, not - based for
c # integer index of grid location).
c
c changed 11/11/08: spheredom for periodically mapped spherical
c grids. could affect top and bottom if fine grid touches
c edge of domain in y direction. if calling with spheredom
c (and not yperdom) then grid is NOT periodically mapped.
c need kflag to indicate spherically mapped now - otherwise
c cant tell the difference, dont skip appropropriate loops
c
c :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::;
c
implicit double precision (a-h,o-z)
dimension listbc(5,maxsp)
include "call.i"
ibc = ispot
ist = iclo - 1
iend = ichi + 1
jst = jclo - 1
jend = jchi + 1
c
c left side (of fine grid, right side of coarse cell)
c
if (ist .lt. ilo .or. kflag .ne. 1) go to 20
lkid = max(jlo,jclo) - jclo + 1
do 10 j = max(jlo,jclo), min(jhi,jchi)
ispot = ispot + 1
listbc(1,ispot) = ist-ilo+nghost+1
listbc(2,ispot) = j-jlo+nghost+1
listbc(3,ispot) = 3
listbc(4,ispot) = mkid
listbc(5,ispot) = lkid
lkid = lkid + 1
10 continue
c
c top side (of fine grid, bottom of coarse cell)
c
20 if (kflag .eq. 1) then ! regular interior case
if (jend .gt. jhi) go to 40
lkid = (jchi-jclo+1) + max(ilo,iclo)-iclo + 1
do 30 i = max(ilo,iclo), min(ihi,ichi)
ispot = ispot + 1
listbc(1,ispot) = i-ilo+nghost+1
listbc(2,ispot) = jend-jlo+nghost+1
listbc(3,ispot) = 4
listbc(4,ispot) = mkid
listbc(5,ispot) = lkid
c write(outunit,595)ispot,(listbc(ipl,ispot),ipl=1,5)
595 format(" entry ",i5," has ", 5i5)
lkid = lkid + 1
30 continue
else if (kflag .eq. 2) then !spherical
c top side of a fine grid is also top side of a coarse cell due to mapping
c write(outunit,*)":fixing top cells with fine grid ",mkid
c original code was insanely complicated. look at all indices and decide.
level = node(nestlevel,mkid) - 1
lkid = (jchi-jclo+1)+ 1 ! starts here wrt fine grid. may not use on coarse grid
do 31 i = iclo, ichi
iwrap = iregsz(level) - i -1
if (iwrap .ge. ilo .and. iwrap .le. ihi) then
ispot = ispot + 1
listbc(1,ispot) = iwrap - ilo + nghost + 1
listbc(2,ispot) = jend - jlo + nghost ! note adjustment of j (one less)
listbc(3,ispot) = 5 ! affects TOP of mapped coarse cell in diff. way
listbc(4,ispot) = mkid
listbc(5,ispot) = lkid
c write(outunit,595)ispot,(listbc(ipl,ispot),ipl=1,5)
endif
lkid = lkid + 1 ! increment fine list loc even if not used
31 continue
endif
c
c right side (of fine grid, left of coarse cell)
c (numbered from bottom to top, so not continuous in lkid numbering)
c
40 if (iend .gt. ihi .or. kflag .ne. 1) go to 60
lkid = (ichi-iclo+1)+(jchi-jclo+1)
. + max(jlo,jclo) - jclo + 1
do 50 j = max(jlo,jclo), min(jhi,jchi)
ispot = ispot + 1
listbc(1,ispot) = iend-ilo+nghost+1
listbc(2,ispot) = j-jlo+nghost+1
listbc(3,ispot) = 1
listbc(4,ispot) = mkid
listbc(5,ispot) = lkid
lkid = lkid + 1
50 continue
c
c bottom side (of fine grid, top of coarse cell, unless spheredom)
c (numbered left to right, so not continuous in lkid numbering)
c
60 if (kflag .eq. 1) then
if (jst .lt. jlo) go to 80
lkid = 2*(jchi-jclo+1)+(ichi-iclo+1) + max(ilo,iclo)-iclo + 1
do 70 i = max(ilo,iclo), min(ihi,ichi)
ispot = ispot + 1
listbc(1,ispot) = i-ilo+nghost+1
listbc(2,ispot) = jst-jlo+nghost+1
listbc(3,ispot) = 2
listbc(4,ispot) = mkid
listbc(5,ispot) = lkid
lkid = lkid + 1
70 continue
else ! spherical
c bottom side of fine grid affects bottom of coarse cell
c fine grids saves fluxes in usual way
c coarse grid only needs to change where to use them
if (kflag .ne. 3) go to 80
c write(outunit,*)":fixing bottom cells with fine grid ",mkid
level = node(nestlevel,mkid)-1
lkid = 2*(jchi-jclo+1) + (ichi-iclo+1) + 1
do 71 i = iclo, ichi
iwrap = iregsz(level) - i - 1
if (iwrap .ge. ilo .and. iwrap .le. ihi) then
ispot = ispot + 1
listbc(1,ispot) = iwrap - ilo + nghost + 1
listbc(2,ispot) = nghost+1 ! grid bottom is at zero index
listbc(3,ispot) = 6 ! affects BOTTOM of mapped coarse cell in diff. way
listbc(4,ispot) = mkid
listbc(5,ispot) = lkid
c write(outunit,595)ispot,(listbc(ipl,ispot),ipl=1,5)
endif
lkid = lkid + 1
71 continue
endif
c
80 continue
return
end