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Comparing ray/doc/man/man1/gendaymtx.1 (file contents):
Revision 1.11 by greg, Tue Jan 7 01:42:30 2020 UTC vs.
Revision 1.16 by greg, Sat Aug 13 17:24:56 2022 UTC

# Line 13 | Line 13 | gendaymtx - generate an annual Perez sky matrix from a
13   ][
14   .B "\-d|\-s|\-n"
15   ][
16 < .B "\-D sunfile"
16 > .B "\-u"
17   ][
18 + .B "\-D sunfile"
19 + [
20 + .B "\-M sunmods"
21 + ]][
22   .B "\-r deg"
23   ][
24   .B "\-m N"
# Line 77 | Line 81 | The default value is
81   .I "\-g 0.2 0.2 0.2"
82   corresponding to a 20% gray.
83   .PP
84 + If there is a sun in the description,
85 + .I gendaymtx
86 + will include its contribution in the four nearest sky patches,
87 + distributing energy according to centroid proximity.
88   The
89   .I \-d
90   option may be used to produce a sun-only matrix, with no sky contributions,
# Line 84 | Line 92 | and the ground patch also set to zero.
92   Alternatively, the
93   .I \-s
94   option may be used to exclude any direct solar component from the output,
95 < with the rest of the sky and ground patch unaffected.
88 < 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.
95 > with the other sky and ground patches unaffected.
96   .PP
97   The
98 + .I \-u
99 + option ignores input times when the sun is below the horizon.
100 + This is a convenient way to average daylight hours only with the
101 + .I \-A
102 + option or to ensure that matrix entries correspond to solar positions
103 + produced with the
104 + .I \-D
105 + option, described below.
106 + .PP
107 + The
108   .I \-n
109 < option may be used if no matrix output is desired.
109 > option may be used if no matrix output is desired at all.
110   This may be used to merely check the input, or in combination with the
111   .I \-D
112   option, below.
# Line 101 | Line 115 | The
115   .I \-D
116   option may be used to specify an output file to contain a list of
117   solar positions and intensities corresponding to time steps in the
118 < weather tape where the sun is visible above the horizion.
118 > weather tape where the sun has any portion above the horizon.
119 > Sun radiance values may be zero if the direct amount is zero on the input.
120 > Sun modifiers and names will be indexed by the minute, numbered from
121 > midnight, January 1st.
122 > If a hyphen ('-') is given as the argument to
123 > .I \-D,
124 > then the sun descriptions  will be directed to the standard output.
125 > This implies the
126 > .I \-n
127 > option just described.
128 > If the
129 > .I \-M
130 > option is given as well, it will be used to record the modifier
131 > names used in the
132 > .I \-D
133 > output, for convenient input to
134 > .I rcontrib(1)
135 > and
136 > .I rfluxmtx(1).
137   .PP
138   By default,
139   .I gendaymtx
# Line 159 | Line 191 | based on Jean-Jacques Delaunay's original gendaylit(1)
191   Greg Ward wrote the final parameter parsing and weather tape conversion.
192   .SH "SEE ALSO"
193   dctimestep(1), genBSDF(1), gendaylit(1), gensky(1), genskyvec(1),
194 < rcollate(1), rcontrib(1), xform(1)
194 > rcollate(1), rcontrib(1), rfluxmtx(1), xform(1)

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