stellinstall/tcspgrid_8f_source.html

      subroutine tcspgrid(

     >   x_newgrid,nx_new,y_newgrid,ny_new,z_newgrid,nz_new,

     >   f_new,if1,if2,

     >   nx,xpkg,ny,ypkg,nz,zpkg,fspl,inf4,inf5,iwarn,ier)

c

c  regrid a spline function f defined vs. x,y,z as in xpkg,ypkg,zpkg

c  to a new grid, given by x_newgrid, y_newgrid, z_newgrid

c

c  set warning flag if the range of x_newgrid or y_newgrid or z_newgrid

c   exceeds the range of the original xpkg or ypkg or zpkg.

c

c  (xpkg,ypkg,zpkg arrays  -- axis data, see genxpkg subroutine)

c

c  input:

c

      real x_newgrid(nx_new)            ! new x grid

      real y_newgrid(ny_new)            ! new y grid

      real z_newgrid(nz_new)            ! new z grid

c

c  output:

c

      integer if1,if2                   ! 1st dimensions of f_new

      real f_new(if1,if2,nz_new)        ! f evaluated on this grid

c

c  input:

c

      integer nx                        ! size of old grid

      real xpkg(nx,4)                   ! old grid "package"

      integer ny                        ! size of old grid

      real ypkg(ny,4)                   ! old grid "package"

      integer nz                        ! size of old grid

      real zpkg(nz,4)                   ! old grid "package"

c

      integer inf4                      ! array dimension

      integer inf5                      ! array dimension

      real fspl(4,4,4,inf4,inf5,nz)     ! spline coefficients of f

c

c  output:

c  condition codes, =0 for normal exit

c

      integer iwarn                     ! =1 if new grid points out of range

      integer ier                       ! =1 if there is an argument error

c

c--------------------------------------------

c  local

c

      real ytmp(nx_new),ztmp(nx_new)

      integer ict(10)

c

      data ict/1,0,0,0,0,0,0,0,0,0/

c

c--------------------------------------------

c

      do iz=1,nz_new

         ztmp=y_newgrid(iz)

         do iy=1,ny_new

            ytmp=y_newgrid(iy)

            call tcspvec(ict,nx_new,x_newgrid,ytmp,ztmp,

     >         nx_new,f_new(1,iy,iz),

     >         nx,xpkg,ny,ypkg,nz,zpkg,fspl,inf4,inf5,iwarn,ier)

         enddo

      enddo

c

      return

      end