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vwrays - compute rays for a given picture or view |
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.SH SYNOPSIS |
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.B vwrays |
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< |
.B "[ -i -u -f{a|f|d} | -d ]" |
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> |
.B "[ -i -u -f{a|f|d} -c rept | -d ]" |
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{ |
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.B "view opts .." |
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| |
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requirements of transferring and interpreting information in |
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.I rtrace. |
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.PP |
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The |
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.I \-c |
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option repeats each pixel the given number of times (default is 1). |
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This is most useful when sending rays to |
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.I rcontrib(1) |
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with the same |
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.I \-c |
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setting, providing a much faster way to average pixels over image sets. |
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The |
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.I \-pj |
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and/or |
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.I \-pd |
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options should be used to jitter sample postions in most cases. |
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.PP |
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View options may be any combination of standard view parameters described |
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in the |
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.I rpict(1) |
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The |
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.I \-pj |
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option may be used to jitter samples. |
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< |
The default value of 0 turns off ray jittering. |
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The |
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.I \-pd |
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option specifies a world-diameter aperture for depth-of-field jittering. |
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The default value of 0 for both options turns off all ray jittering. |
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.PP |
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If the |
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.I \-d |
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.I \-ld |
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switch will also be printed, with |
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.I \-ld+ |
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if the view file has an aft clipping plane, and |
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< |
.I \-ld- |
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otherwise. |
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if the view has an aft clipping plane. |
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This is useful for passing options to the |
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.I rtrace |
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command line. |
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a rendered picture, it will only produce standard scanline-ordered rays when |
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given a set of view parameters. |
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.SH "SEE ALSO" |
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< |
rcalc(1), rpict(1), rtcontrib(1), rtrace(1) |
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> |
rcalc(1), rcode_depth(1), rcontrib(1), rpict(1), rtpict(1), rtrace(1) |
