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       lookamb - examine ambient file values


       lookamb [ -d ][ -r ][ -h ] [ ambfile ]


       Lookamb  examines  an  ambient file produced by rpict(1), rtrace(1), or
       rvu(1).  The  default  mode  prints  the  position,  direction,  level,
       weight,  radius,  value,  position  gradient and direction gradient for
       each stored ambient value preceded by a  label  appropriate  for  human
       interpretation.  The -d option prints the same quantities in 18 columns
       without any expanatory text,  and  is  more  appropriate  as  input  to
       another program.

       The  -r  option  performs  the reverse conversion, taking the output of
       lookamb and reproducing the  original  ambient  file  on  the  standard

       The -h option causes lookamb not to print out the header information on
       the output, or not to expect it on the input with the -r option.

       If no file is given, lookamb reads from the standard input.


       Before release 2.2 of  Radiance,  ambient  files  were  in  a  machine-
       dependent  format.  Since that is no longer the case, ambient files can
       now be moved freely between machines without  any  conversions.   Thus,
       the  only  reason  to  use lookamb now is to examine the contents of an
       ambient file.


       Greg Ward


       getinfo(1), oconv(1), pfilt(1), pinterp(1), rpict(1), rtrace(1), rvu(1)