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Comparing ray/doc/man/man1/dctimestep.1 (file contents):
Revision 1.7 by greg, Thu Sep 5 17:53:22 2013 UTC vs.
Revision 1.8 by greg, Sat Feb 8 01:28:05 2014 UTC

# Line 10 | Line 10 | dctimestep - compute annual simulation time-step(s) vi
10   .B "\-o ospec"
11   ][
12   .B "\-i{f|d}
13 + ][
14 + .B "\-o{f|d}
15   ]
16   .B DCspec
17   [
# Line 23 | Line 25 | dctimestep - compute annual simulation time-step(s) vi
25   .B "\-o ospec"
26   ][
27   .B "\-i{f|d}
28 + ][
29 + .B "\-o{f|d}
30   ]
31   .B Vspec
32   .B Tbsdf.xml
# Line 79 | Line 83 | format, respectively, which is more efficient for larg
83   .PP
84   Sent to the standard output of
85   .I dctimestep
86 < is either an ASCII color vector with as many RGB triplets
86 > is either a color vector with as many RGB triplets
87   as there are rows in the View matrix, or a combined
88   .I Radiance
89   picture.
# Line 112 | Line 116 | If the given specification contains a '%d' format stri
116   will be replaced by the time step index, starting from 1.
117   In this way, multiple output pictures may be produced,
118   or separate result vectors (one per time step).
119 + If the standard output is used or the
120 + .I \-o
121 + option specifies a single output file, then an information header
122 + will precede the output.
123 + This can be removed if desired using the
124 + .I getinfo\(1\)
125 + command with a single hyphen ('-') argument.
126 + .PP
127 + The
128 + .I \-of
129 + or
130 + .I \-od
131 + option may be used to specify IEEE float or double binary output
132 + data, respectively.
133 + This enables
134 + .I dctimestep
135 + to be used as a pure matrix multiplier, as the output file with
136 + header specifying the format is suitable for subsequent calls.
137   .SH EXAMPLES
138   To compute workplane illuminances at 3:30pm on Feb 10th:
139   .IP "" .2i
# Line 142 | Line 164 | Generate a series of pictures corresponding to timeste
164   in an annual simulation:
165   .IP "" .2i
166   gendaymtx NYCity.wea | dctimestep -n 8760 -o tstep%04d.hdr dcomp%03d.hdr
167 + .PP
168 + To multiply two color matrices (second matrix is IEEE-float with
169 + 145 RGB columns) into a IEEE-double result (also 145 RGB columns):
170 + .IP "" .2i
171 + getinfo - < Inp2.fmx | dctimestep -n 145 -if -od Inp1.fmx > Inp1xInp2.dmx
172   .SH AUTHOR
173   Greg Ward
174   .SH "SEE ALSO"
175 < gendaymtx(1), genklemsamp(1), genskyvec(1),
175 > gendaymtx(1), genklemsamp(1), genskyvec(1), getinfo(1),
176   mkillum(1), rcollate(1), rcontrib(1), rtrace(1), vwrays(1)

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