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filpatch.f.html |
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Source file: filpatch.f
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Directory: /home/rjl/git/claworg/clawpack-4.x/amrclaw/2d/lib
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Converted: Sat Aug 6 2011 at 21:59:30
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
recursive subroutine filrecur(level,nvar,valbig,aux,naux,
1 time,mitot,mjtot,
2 nrowst,ncolst,ilo,ihi,jlo,jhi)
c :::::::::::::::::::::::::::: FILPATCH :::::::::::::::::::::::::;
c
c fill the portion of valbig from rows nrowst
c and cols ncolst
c the patch can also be described by the corners (xlp,ybp) by (xrp,ytp).
c vals are needed at time time , and level level,
c
c first fill with values obtainable from the level level
c grids. if any left unfilled, then enlarge remaining rectangle of
c unfilled values by 1 (for later linear interp), and recusively
c obtain the remaining values from coarser levels.
c
c :::::::::::::::::::::::::::::::::::::::;:::::::::::::::::::::::;
implicit double precision (a-h,o-z)
include "call.i"
logical set, sticksout
dimension valbig(mitot,mjtot,nvar), aux(mitot,mjtot,naux)
c use stack-based scratch arrays instead of alloc, since dont really
c need to save beyond these routines, and to allow dynamic memory resizing
c
c use 1d scratch arrays that are potentially the same size as
c current grid, since may not coarsen.
c need to make it 1d instead of 2 and do own indexing, since
c when pass it in to subroutines they treat it as having different
c dimensions than the max size need to allocate here
c
!-- dimension valcrse((ihi-ilo+2)*(jhi-jlo+2)*nvar) ! NB this is a 1D array
!-- dimension auxcrse((ihi-ilo+2)*(jhi-jlo+2)*naux) ! the +2 is to expand on coarse grid to enclose fine
c ### turns out you need 3 rows, forget offset of 1 plus one on each side
dimension valcrse((ihi-ilo+3)*(jhi-jlo+3)*nvar) ! NB this is a 1D array
dimension auxcrse((ihi-ilo+3)*(jhi-jlo+3)*naux) ! the +3 is to expand on coarse grid to enclose fine
c
dimension flaguse(ihi-ilo+1,jhi-jlo+1)
c iadflag(i,j) = locuse + i-1+(j-1)*nrowp ! no longer used
c ivalc(i,j,ivar) = loccrse + (i - 1) + nrowc*(j - 1)
ivalc(i,j,ivar) = i + nrowc*(j - 1)
& + nrowc*ncolc*(ivar-1)
sticksout(iplo,iphi,jplo,jphi) =
& (iplo .lt. 0 .or. jplo .lt. 0 .or.
& iphi .ge. iregsz(levc) .or. jphi .ge. jregsz(levc))
!-- write(*,*)" entering filrecur with level ",level
!-- write(*,*)" and patch indices ilo,ihi,jlo,jhi ",
!-- & ilo,ihi,jlo,jhi
c
c We begin by filling values for grids at level level. If all values can be
c filled in this way, we return;
nrowp = ihi - ilo + 1
ncolp = jhi - jlo + 1
c locuse = igetsp(nrowp*ncolp)
hxf = hxposs(level)
hyf = hyposs(level)
xlp = xlower + ilo*hxf
xrp = xlower + (ihi+1)*hxf
ybp = ylower + jlo*hyf
ytp = ylower + (jhi+1)*hyf
call intfil
& (valbig,mitot,mjtot,time,flaguse,nrowst,ncolst,
& ilo,ihi,jlo,jhi,level,nvar,naux)
c & (valbig,mitot,mjtot,time,locuse,nrowst,ncolst,
c
c Trimbd returns set = true if all of the entries are filled (=1.).
c set = false, otherwise. If set = true, then no other levels are
c are required to interpolate, and we return.
c
c Note that the used array is filled entirely in intfil, i.e. the
c marking done there also takes into account the points filled by
c the boundary conditions. bc2amr will be called later, after all 4
c boundary pieces filled.
c call trimbd(alloc(locuse),nrowp,ncolp,set,il,ir,jb,jt)
call trimbd(flaguse,nrowp,ncolp,set,il,ir,jb,jt)
if (set) go to 90 ! all done except for bcs
c
c otherwise make recursive calls to coarser levels to fill remaining unset points
c
if (level .eq. 1) then
write(outunit,*)" error in filrecur - level 1 not set"
write(outunit,900) nrowst,ncolst
write(*,*)" error in filrecur - level 1 not set"
write(*,*)" should not need more recursion "
write(*,*)" to set patch boundaries"
write(*,900) nrowst,ncolst
900 format("start at row: ",i4," col ",i4)
stop
endif
c set = false. we will have to interpolate some values from coarser
c levels. We begin by initializing the level level arrays, so that we can use
c purely recursive formulation for interpolating.
levc = level - 1
hxc = hxposs(levc)
hyc = hyposs(levc)
isl = il + ilo - 1
isr = ir + ilo - 1
jsb = jb + jlo - 1
jst = jt + jlo - 1
c
c coarsen
lratiox = intratx(levc)
lratioy = intraty(levc)
iplo = (isl-lratiox+nghost*lratiox)/lratiox - nghost
jplo = (jsb-lratioy+nghost*lratioy)/lratioy - nghost
iphi = (isr+lratiox)/lratiox
jphi = (jst+lratioy)/lratioy
xlc = xlower + iplo*hxc
ybc = ylower + jplo*hyc
xrc = xlower + (iphi+1)*hxc
ytc = ylower + (jphi+1)*hyc
nrowc = iphi - iplo + 1
ncolc = jphi - jplo + 1
ntot = nrowc*ncolc*(nvar+naux)
c write(*,876) nrowc,ncolc, ihi-ilo+2,jhi-jlo+2
c write(*,876) nrowc,ncolc, ihi-ilo+3,jhi-jlo+3
876 format(" needed coarse grid size ",2i5," allocated ",2i5)
if (nrowc .gt. ihi-ilo+3 .or. ncolc .gt. jhi-jlo+3) then
write(*,*)" did not make big enough work space in filrecur "
write(*,*)" need coarse space with nrowc,ncolc ",nrowc,ncolc
write(6,*)" made space for ilo,ihi,jlo,jhi ",ilo,ihi,jlo,jhi
stop
endif
c loccrse = igetsp(ntot)
c locauxc = loccrse + nrowc*ncolc*nvar
if (naux.gt.0) then
maxmx = nrowc - 2*nghost
mx = maxmx
maxmy = ncolc - 2*nghost
my = maxmy
xl = xlc + nghost*hxc
yb = ybc + nghost*hyc
call setaux(maxmx,maxmy,nghost,mx,my,xl,yb,hxc,hyc,
& naux,auxcrse)
c & naux,alloc(locauxc))
endif
if ((xperdom .or. (yperdom .or. spheredom)) .and.
& sticksout(iplo,iphi,jplo,jphi)) then
call prefilrecur(levc,nvar,valcrse,auxcrse,
1 naux,time,nrowc,ncolc,1,1,
2 iplo,iphi,jplo,jphi)
else
c call filrecur(levc,nvar,alloc(loccrse),alloc(locauxc),naux,
call filrecur(levc,nvar,valcrse,auxcrse,naux,
1 time,nrowc,ncolc,1,1,
2 iplo,iphi,jplo,jphi)
endif
c interpolate back up
20 continue
do 100 iff = 1,nrowp
ic = 2 + (iff-(isl-ilo)-1)/lratiox
eta1 = (-0.5d0+dble(mod(iff-1,lratiox)))/dble(lratiox)
do 100 jf = 1,ncolp
jc = 2 + (jf -(jsb-jlo)-1)/lratioy
eta2 = (-0.5d0+dble(mod(jf -1,lratioy)))/dble(lratioy)
c flag = alloc(iadflag(iff,jf))
flag = flaguse(iff,jf)
if (flag .eq. 0.0) then
c xif = xlp + (.5 + float(iff-1))*hxf
c yjf = ybp + (.5 + float(jf -1))*hyf
c ic=idint((xif-xlc+.5*hxc)/hxc)
c jc=idint((yjf-ybc+.5*hyc)/hyc)
c xc = xlc + (float(ic) - .5)*hxc
c yc = ybc + (float(jc) - .5)*hyc
c eta1 = (xif - xc)/hxc
c eta2 = (yjf - yc)/hyc
do 101 ivar = 1,nvar
!--
!-- valp10 = alloc(ivalc(ic+1,jc,ivar))
!-- valm10 = alloc(ivalc(ic-1,jc,ivar))
!-- valc = alloc(ivalc(ic ,jc,ivar))
!-- valp01 = alloc(ivalc(ic ,jc+1,ivar))
!-- valm01 = alloc(ivalc(ic ,jc-1,ivar))
valp10 = valcrse(ivalc(ic+1,jc,ivar))
valm10 = valcrse(ivalc(ic-1,jc,ivar))
valc = valcrse(ivalc(ic ,jc,ivar))
valp01 = valcrse(ivalc(ic ,jc+1,ivar))
valm01 = valcrse(ivalc(ic ,jc-1,ivar))
dupc = valp10 - valc
dumc = valc - valm10
ducc = valp10 - valm10
du = dmin1(dabs(dupc),dabs(dumc))
du = dmin1(2.d0*du,.5d0*dabs(ducc))
fu = dmax1(0.d0,dsign(1.d0,dupc*dumc))
dvpc = valp01 - valc
dvmc = valc - valm01
dvcc = valp01 - valm01
dv = dmin1(dabs(dvpc),dabs(dvmc))
dv = dmin1(2.d0*dv,.5d0*dabs(dvcc))
fv = dmax1(0.d0,dsign(1.d0,dvpc*dvmc))
valint = valc + eta1*du*dsign(1.d0,ducc)*fu
. + eta2*dv*dsign(1.d0,dvcc)*fv
c valc00 = alloc(ivalc(ic,jc,ivar))
c valc10 = alloc(ivalc(ic+1,jc,ivar))
c valc01 = alloc(ivalc(ic,jc+1,ivar))
c valc11 = alloc(ivalc(ic+1,jc+1,ivar))
c valint = (1. - eta2)*
c & ((1. - eta1)*valc00 + eta1*valc10)
c & + eta2*((1. - eta1)*valc01 + eta1*valc11)
valbig(iff+nrowst-1,jf+ncolst-1,ivar) = valint
101 continue
endif
100 continue
c call reclam(loccrse,ntot)
90 continue
c
c set bcs, whether or not recursive calls needed. set any part of patch that stuck out
c
call bc2amr(valbig,aux,mitot,mjtot,nvar,naux,
1 hxf,hyf,level,time,
2 xlp,xrp,ybp,ytp,
3 xlower,ylower,xupper,yupper,
4 xperdom,yperdom,spheredom)
c call reclam(locuse,nrowp*ncolp)
return
end