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Comparing ray/doc/man/man1/gendaymtx.1 (file contents):
Revision 1.9 by greg, Tue May 28 15:19:17 2019 UTC vs.
Revision 1.11 by greg, Tue Jan 7 01:42:30 2020 UTC

# Line 9 | Line 9 | gendaymtx - generate an annual Perez sky matrix from a
9   ][
10   .B "\-h"
11   ][
12 < .B "\-d|\-s"
12 > .B "\-A"
13   ][
14 + .B "\-d|\-s|\-n"
15 + ][
16 + .B "\-D sunfile"
17 + ][
18   .B "\-r deg"
19   ][
20   .B "\-m N"
# Line 42 | Line 46 | parameter setting.
46   .PP
47   Increasing the
48   .I \-m
49 < parameter, typically by factors of two, yields a higher resolution
49 > parameter yields a higher resolution
50   sky using the Reinhart patch subdivision.
51   For example, setting
52   .I "\-m 4"
# Line 53 | Line 57 | Thus, an hourly weather tape for an entire year would
57   yield 8760x3 (26280) values per output line (row).
58   .PP
59   The
60 + .I \-A
61 + option tells
62 + .I gendaymtx
63 + to generate a single column corresponding to an average sky
64 + computed over all the input time steps, rather than one
65 + column per time step.
66 + .PP
67 + The
68   .I \-c
69   option may be used to specify a color for the sky.
70   The gray value should equal 1 for proper energy balance.
# Line 77 | Line 89 | If there is a sun in the description,
89   .I gendaymtx
90   will include its contribution in the four nearest sky patches,
91   distributing energy according to centroid proximity.
92 + .PP
93 + The
94 + .I \-n
95 + option may be used if no matrix output is desired.
96 + This may be used to merely check the input, or in combination with the
97 + .I \-D
98 + option, below.
99 + .PP
100 + The
101 + .I \-D
102 + option may be used to specify an output file to contain a list of
103 + solar positions and intensities corresponding to time steps in the
104 + weather tape where the sun is visible above the horizion.
105   .PP
106   By default,
107   .I gendaymtx

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