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rad2mgf (1)
NAME
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rad2mgf - convert RADIANCE scene description to Materials and Geometry Format |
SYNOPSIS
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rad2mgf [ -dU ] [ input ..
] |
DESCRIPTION
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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. |
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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
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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. |
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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
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To convert three RADIANCE files (in feet) to one MGF
file: |
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rad2mgf -df file1.rad file2.rad file3.rad >
scene.mgf |
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To translate a RADIANCE materials file to MGF: |
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rad2mgf materials.rad > materials.mgf |
AUTHOR
SEE ALSO
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MGF web site
"http://radsite.lbl.gov/mgf/HOME.html" |
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