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.\" RCSid "$Id$"
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.TH RHOPTIMIZE 1 1/25/99 RADIANCE
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.SH NAME
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rhoptimize - optimize beam locations in holodeck file
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.SH SYNOPSIS
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.B rhoptimize
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[
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.B \-u
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]
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.B src_holo
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[
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.B dest_holo
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]
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.SH DESCRIPTION
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.I Rhoptimize
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optimizes beam positions and eliminates fragment waste in the holodeck file
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.I src_holo,
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writing the result to
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.I dest_holo,
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or back into
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.I src_holo
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if only one argument is given.
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This may improve rendering speed on large holodecks, which tend to have
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widely dispersed beam positions that cause delays due to long file seeks.
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It may also reduce the size of the file, since large holodecks become
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fragmented as they fill up with new ray samples.
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(Use the
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.I rhinfo(1)
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program to determine holodeck file fragmentation.)
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The
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.I \-u
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option adds a check to make sure that each ray sample is unique, i.e., the same sample
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is never given twice.
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This check is usually unnecessary, but may eliminate redundant samples from some
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holodeck files.
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.SH EXAMPLE
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To optimize the beam order in old.hdk and write the results to new.hdk:
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.IP "" .2i
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rhoptimize old.hdk new.hdk
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.PP
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To optimize beam order in scene.hdk:
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.IP "" .2i
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rhoptimize scene.hdk
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.SH NOTES
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If
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.I rhoptimize
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is given only one file argument,
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it creates a temporary file in the same directory, and moves it onto
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the original file once it has successfully completed its operation.
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If the operation fails for some reason, the temporary file is removed
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and the original holodeck is left unchanged.
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.PP
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This program generally takes several minutes to run and offers no progress
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reports.
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.SH FILES
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rho????.hdk temporary file to hold new holodeck
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.SH AUTHOR
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Greg Ward Larson
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.SH ACKNOWLEDGMENT
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This work was supported by Silicon Graphics, Inc.
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.SH "SEE ALSO"
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getinfo(1), pfilt(1), psign(1), rhcopy(1), rhinfo(1), rholo(1), rpict(1)
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