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.\" RCSid "$Id$" |
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.TH RAD2MGF 1 5/15/95 RADIANCE |
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.SH NAME |
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rad2mgf - convert RADIANCE scene description to Materials and Geometry Format |
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.SH SYNOPSIS |
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.B rad2mgf |
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[ |
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.B \-dU |
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] |
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[ |
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.B input .. |
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] |
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.SH DESCRIPTION |
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.I Rad2mgf |
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converts one or more RADIANCE scene files |
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to the Materials and Geometry Format (MGF). |
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Input units are specified with the |
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.I \-mU |
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option, where |
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.I U |
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is one of 'm' (meters), 'c' (centimeters), 'f' (feet) or 'i' |
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(inches). |
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The assumed unit is meters, which is the required output unit for |
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MGF (thus the need to know). |
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If the input dimensions are in none of these units, then the user |
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should apply |
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.I xform(1) |
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with the |
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.I \-s |
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option to bring the units into line prior to translation. |
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.PP |
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The MGF material names and properties |
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for the surfaces will be those assigned in RADIANCE. |
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If a referenced material has not been defined, then its name will |
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be invoked in the MGF output without definition, and the description |
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will be incomplete. |
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.SH LIMITATIONS |
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Although MGF supports all of the geometric types and the most |
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common material types used in RADIANCE, there is currently no |
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support for advanced BRDF materials, patterns, textures or mixtures. |
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Also, the special types "source" and "antimatter" are not supported, |
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and all light source materials are converted to simple diffuse emitters |
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(except "illum" materials, which are converted to their alternates). |
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These primitives are reproduced as comments in the output and |
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must be replaced manually if necessary. |
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.PP |
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The RADIANCE "instance" type is treated specially. |
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.I Rad2mgf |
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converts each instance to an MGF include statement, using the corresponding |
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transformation and a file name derived from the octree name. |
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(The original octree suffix is replaced by ".mgf".)\0 |
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For this to work, the user must separately create the referenced |
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MGF files from the original RADIANCE descriptions. |
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The description file names can usually be determined using the |
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.I getinfo(1) |
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command run on the octrees in question. |
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.SH EXAMPLE |
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To convert three RADIANCE files (in feet) to one MGF file: |
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.IP "" .2i |
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rad2mgf -df file1.rad file2.rad file3.rad > scene.mgf |
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.PP |
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To translate a RADIANCE materials file to MGF: |
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.IP "" .2i |
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rad2mgf materials.rad > materials.mgf |
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.SH AUTHOR |
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Greg Ward |
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.SH "SEE ALSO" |
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getinfo(1), ies2rad(1), mgf2meta(1), mgf2rad(1), obj2rad(1), oconv(1), xform(1) |
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.PP |
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MGF web site "http://radsite.lbl.gov/mgf/HOME.html" |
