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subroutine int3d
C --------------------------------------------
c Scilab int3d
c implicit undefined (a-z)
c Copyright INRIA
include '../stack.h'
character*(5) fname
character*(nlgh+1) namef
integer iero
common/ierajf/iero
external bint3d,fint3d
double precision epsabs,epsrel,result,abserr
logical getexternal,getrmat,type ,cremat,checkval,getscalar
integer topk,lr,katop,kydot,top2,lra,lrb,lc,gettype,top0
c
integer iadr,sadr
external setfint3d
c
iadr(l)=l+l-1
sadr(l)=(l/2)+1
fname='int3d'
if(rhs.lt.4) then
call error(39)
return
endif
type=.false.
top0=top-rhs+1
topk=top
if(rhs.eq.6) then
c [minpts,maxpts,epsabs,epsrel]
if (.not.getrmat(fname,topk,top,m1,n1,lr)) return
if(.not.checkval(fname,m1*n1,4)) return
minpts=max(int(stk(lr)),0)
maxpts=max(int(stk(lr+1)),0)
epsabs=max(stk(lr+2),0.0d0)
epsrel=max(stk(lr+3),0.0d0)
if(maxpts.lt.minpts) then
err= 5
call error(36)
endif
top=top-1
else
minpts=0
maxpts=1000
epsabs=0.0d0
epsrel=1.D-5
endif
c
if(gettype(top).eq.1) then
if(.not.getscalar(fname,topk,top,lnum)) return
numfun=stk(lnum)
top=top-1
else
numfun=1
endif
top2=top
if (.not.getexternal(fname,topk,top,namef,type,setfint3d)) return
kext=top
top=top-1
if (.not.getrmat(fname,topk,top,mz,nz,lz)) return
if(.not.checkval(fname,mz,4)) return
top=top-1
if (.not.getrmat(fname,topk,top,my,ny,ly)) return
if(.not.checkval(fname,my,4)) return
top=top-1
if (.not.getrmat(fname,topk,top,mx,nx,lx)) return
if(.not.checkval(fname,mx,4)) return
if(.not.checkval(fname,nx,ny)) return
if(.not.checkval(fname,nx,nz)) return
numtet=nx
maxpts=max(maxpts,43*numtet)
top=top2
c form matrix ver
maxsub = 7*(maxpts-43*numtet)/(8*43) + numtet
lenver=maxsub
top=top+1
if (.not.cremat(fname,top,0,3,4*lenver,lver,lc)) return
call dcopy(4*numtet,stk(lx),1,stk(lver),3)
call dcopy(4*numtet,stk(ly),1,stk(lver+1),3)
call dcopy(4*numtet,stk(lz),1,stk(lver+2),3)
c allocate matrix for result and abserr
top=top+1
if (.not.cremat(fname,top,0,numfun,2,lres,lc)) return
c form arg shape for external
top=top+1
kxyz=top
if (.not.cremat(fname,top,0,3,1,lxyz,lc)) return
c tableaux de travail
mdiv=1
nw=maxsub*(2*numfun+1) + 7*max(8*mdiv,numtet)*numfun + 1
top=top+1
if (.not.cremat(fname,top,0,1,nw,lwork,lc)) return
c tableau de travail entier necessaire
niw=lenver + mdiv
top=top+1
if (.not.cremat(fname,top,0,1,iadr(niw)+1,liwork,lc)) return
c
c external scilab
c
top=top+1
ipal=iadr(lstk(top))
istk(ipal)=1
istk(ipal+1)=ipal+2
istk(ipal+2)=kext
istk(ipal+3)=kxyz
lstk(top+1)=sadr(ipal+4)
irestar=0
if(type) then
call dcutet(fint3d,numfun,stk(lver),numtet,minpts,maxpts,epsabs
$ ,epsrel,lenver,nw,irestar,stk(lres),stk(lres+numfun),neval
$ ,ifail,stk(lwork),stk(liwork))
else
call dcutet(bint3d,numfun,stk(lver),numtet,minpts,maxpts,epsabs
$ ,epsrel,lenver,nw,irestar,stk(lres),stk(lres+numfun),neval
$ ,ifail,stk(lwork),stk(liwork))
endif
if(err.gt.0)return
if(ifail.gt.0) then
if(ifail.eq.1) then
c MAXPTS was too small to obtain the required accuracy
call msgs(85,0)
elseif(ifail.eq.3) then
c volume of one of the given tetrahedrons is zero
buf='volume of one of the given tetrahedrons is zero'
call error(999)
else
buf='inexpected error: please report'
call error(999)
endif
endif
top=top0
if (.not.cremat(fname,top,0,numfun,1,lr1,lc)) return
call dcopy(numfun,stk(lres),1,stk(lr1),1)
if(lhs.ge.2) then
top=top+1
if (.not.cremat(fname,top,0,numfun,1,lr2,lc)) return
call dcopy(numfun,stk(lres+numfun),1,stk(lr2),1)
endif
if(lhs.eq.3) then
top=top+1
if (.not.cremat(fname,top,0,1,1,lr2,lc)) return
stk(lr2)=neval
endif
return
end
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