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rad2mgf - convert RADIANCE scene description to Materials
and Geometry Format
rad2mgf [ -dU ] [ input .. ]
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
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.
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
getinfo(1), ies2rad(1), mgf2meta(1), mgf2rad(1), obj2rad(1),
MGF web site "http://radsite.lbl.gov/mgf/HOME.html"
Header and Footer
RAD2MGF(1) RADIANCE (5/15/95) RAD2MGF(1)
Page 1 (printed 7/17/96)
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