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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 -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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.I \-i |
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option may be used to specify desired pixel positions on the standard |
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input rather than generating all the pixels for a given view. |
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If the |
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.I \-u |
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option is also given, output will be unbuffered. |
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.PP |
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The |
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.I \-f |
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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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option 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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.PP |
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If a picture is given on the command line rather than a set of view options, |
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then the view and image dimensions are taken from the picture file, and |
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< |
the reported ray origins and directions will exactly match the center of each |
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< |
pixel in the picture. |
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> |
the reported ray origins and directions will match the center of each |
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> |
pixel in the picture (plus optional jitter). |
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.PP |
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If a depth buffer file is given as well, then |
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.I vwrays |
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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), rpict(1), rcontrib(1), rtrace(1) |
