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Comparing ray/doc/man/man1/vwrays.1 (file contents):
Revision 1.4 by greg, Mon Sep 19 04:26:08 2005 UTC vs.
Revision 1.8 by greg, Sat Aug 20 20:57:51 2011 UTC

# Line 4 | Line 4
4   vwrays - compute rays for a given picture or view
5   .SH SYNOPSIS
6   .B vwrays
7 < .B "[ -i -f{a|f|d} | -d ]"
7 > .B "[ -i -u -f{a|f|d} | -d ]"
8   {
9   .B "view opts .."
10   |
# Line 25 | Line 25 | The
25   .I \-i
26   option may be used to specify desired pixel positions on the standard
27   input rather than generating all the pixels for a given view.
28 + If the
29 + .I \-u
30 + option is also given, output will be unbuffered.
31   .PP
32   The
33   .I \-f
# Line 90 | Line 93 | otherwise, which would produce a uniform clipping dist
93   .PP
94   If a picture is given on the command line rather than a set of view options,
95   then the view and image dimensions are taken from the picture file, and
96 < the reported ray origins and directions will exactly match the center of each
97 < pixel in the picture.
96 > the reported ray origins and directions will match the center of each
97 > pixel in the picture (plus optional jitter).
98   .PP
99   If a depth buffer file is given as well, then
100   .I vwrays
# Line 105 | Line 108 | for light rays leaving the scene surfaces to strike ea
108   To compute the ray intersection points and returned directions corresponding
109   to a picture and its depth buffer:
110   .IP "" .2i
111 < vwrays scene_v2.pic scene_v2.zbf > scene_v2.pts
111 > vwrays scene_v2.hdr scene_v2.zbf > scene_v2.pts
112   .PP
113   To determine what the dimensions of a given view would be:
114   .IP "" .2i
115 < vwrays -d -vf myview.vf -x 2048 -y 2048
115 > vwrays \-d \-vf myview.vf \-x 2048 \-y 2048
116   .PP
117   To generate a RADIANCE picture using
118   .I rtrace
119   instead of
120   .I rpict:
121   .IP "" .2i
122 < vwrays -ff -vf view1.vf -x 1024 -y 1024 |
123 < rtrace `vwrays -d -vf view1.vf -x 1024 -y 1024` -ffc scene.oct > view1.pic
122 > vwrays \-ff \-vf view1.vf \-x 1024 \-y 1024 |
123 > rtrace `vwrays \-d \-vf view1.vf \-x 1024 \-y 1024` \-ffc scene.oct > view1.hdr
124   .SH AUTHOR
125   Greg Ward Larson
126   .SH ACKNOWLEDGMENT

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