Radiance rad2mgf program



RAD2MGF(1)                                                          RAD2MGF(1)




NAME

       rad2mgf  - convert RADIANCE scene description to Materials and Geometry
       Format


SYNOPSIS

       rad2mgf [ -dU ] [ input ..  ]


DESCRIPTION

       Rad2mgf converts one or more RADIANCE scene files to the Materials  and
       Geometry  Format (MGF).  Input units are specified with the -mU option,
       where U is one of 'm' (meters), 'c' (centimeters), 'f'  (feet)  or  'i'
       (inches).   The  assumed  unit  is meters, which is the required output
       unit for MGF (thus the need to know).  If the input dimensions  are  in
       none  of  these  units, then the user should apply xform(1) with the -s
       option to bring the units into line prior to translation.

       The MGF material names and properties for the surfaces  will  be  those
       assigned  in  RADIANCE.  If a referenced material has not been defined,
       then its name will be invoked in the MGF output without definition, and
       the description will be incomplete.


LIMITATIONS

       Although  MGF  supports  all of the geometric types and the most common
       material types used in RADIANCE, there  is  currently  no  support  for
       advanced  BRDF  materials,  patterns,  textures or mixtures.  Also, the
       special types "source" and "antimatter"  are  not  supported,  and  all
       light source materials are converted to simple diffuse emitters (except
       "illum" materials, which are converted  to  their  alternates).   These
       primitives  are  reproduced  as  comments  in  the  output  and must be
       replaced manually if necessary.

       The RADIANCE "instance" type is treated  specially.   Rad2mgf  converts
       each  instance  to  an  MGF  include statement, using the corresponding
       transformation and a file name derived  from  the  octree  name.   (The
       original  octree  suffix is replaced by ".mgf".)  For this to work, the
       user must separately create the referenced MGF files from the  original
       RADIANCE  descriptions.   The  description  file  names  can usually be
       determined using the getinfo(1) command run on the octrees in question.


EXAMPLE

       To convert three RADIANCE files (in feet) to one MGF file:

         rad2mgf -df file1.rad file2.rad file3.rad > scene.mgf

       To translate a RADIANCE materials file to MGF:

         rad2mgf materials.rad > materials.mgf


AUTHOR

       Greg Ward


SEE ALSO

       getinfo(1),  ies2rad(1), mgf2meta(1), mgf2rad(1), obj2rad(1), oconv(1),
       xform(1)

       MGF web site "http://radsite.lbl.gov/mgf/HOME.html"



RADIANCE                            5/15/95                         RAD2MGF(1)

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