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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) |
