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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} | -d ]" |
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{ |
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.B "view opts .." |
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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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.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 |
