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Name

miller - ascii (plot) format for Miller’s N-body snapshot files

Synopsis


c     print two consecutive steps from movie file
c       for peter teuben
c       source teuben.f on humbabe  10 july 1994
      program main
c
      integer karr(64),kcoord(4,2048)
      real ahold(2048),rarr(64)
      equivalence (karr(1),rarr(1))
c
      open(9,file=’awobl8f’,form=’unformatted’,status=’old’)
c
      kstep=767
c     steps kstep and kstep+1 will be extracted and formatted
   10 continue
      read(9,end=270) karr
      read(9,end=270) ahold
      if (karr(1).lt.kstep) go to 10
c     skip up to one less than desired step number
c
      write(6,9019) rarr(31)
      do 40 k=1,32,16
         ku=min0(k+15,30)
   40    write(6,9020)(karr(j),j=k,ku)
      do 50 k=33,64,8
         ku=k+7
   50    write(6,9022)(rarr(j),j=k,ku)
c
      call unpack1(kcoord,ahold)
c     unpack1 is a subroutine that unpacks our compact ahold(2048) into
c        array kcoord(4,2048) of integers.
c
      do 60 kp=1,2048
   60    write(6,9030) (kcoord(k,kp),k=1,4)
      write(6,9033)
c
      if (karr(1).le.kstep) go to 10
c
  270 continue
c
 9019 format(2x,a8)
 9020 format(2x,16i8)
 9022 format(2x,8e13.5)
 9030 format(4i7)
 9033 format(/)
c
      stop
      end

Description

miller is (one of?) the ascii plot format(s) used by Miller & Smith in their N-body codes. It typically only outputs a fraction of the particles used in the integration, and does not contain velocity information. Instead, two adjacent snapshots are used to construct velocities. A sample implementation of converting this format to snapshot(5NEMO) .

See Also

miller(1NEMO)

Author

Peter Teuben

Update History


13-jul-94    man written     PJT

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