ViewVC Help
View File | Revision Log | Show Annotations | Download File | Root Listing
root/radiance/ray/doc/man/man1/gendaymtx.1
(Generate patch)

Comparing ray/doc/man/man1/gendaymtx.1 (file contents):
Revision 1.1 by greg, Sun Jan 20 02:07:16 2013 UTC vs.
Revision 1.15 by greg, Wed Feb 17 02:30:08 2021 UTC

# Line 7 | Line 7 | gendaymtx - generate an annual Perez sky matrix from a
7   [
8   .B "\-v"
9   ][
10 < .B "\-d|\-s"
10 > .B "\-h"
11   ][
12 + .B "\-A"
13 + ][
14 + .B "\-d|\-s|\-n"
15 + ][
16 + .B "\-u"
17 + ][
18 + .B "\-D sunfile"
19 + [
20 + .B "\-M sunmods"
21 + ]][
22 + .B "\-r deg"
23 + ][
24   .B "\-m N"
25   ][
26   .B "\-g r g b"
# Line 16 | Line 28 | gendaymtx - generate an annual Perez sky matrix from a
28   .B "\-c r g b"
29   ][
30   .B "-o{f|d}"
31 + ][
32 + .B "-O{0|1}"
33   ]
34   [
35   .B "tape.wea"
# Line 36 | Line 50 | parameter setting.
50   .PP
51   Increasing the
52   .I \-m
53 < parameter, typically by factors of two, yields a higher resolution
53 > parameter yields a higher resolution
54   sky using the Reinhart patch subdivision.
55   For example, setting
56   .I "\-m 4"
# Line 47 | Line 61 | Thus, an hourly weather tape for an entire year would
61   yield 8760x3 (26280) values per output line (row).
62   .PP
63   The
64 + .I \-A
65 + option tells
66 + .I gendaymtx
67 + to generate a single column corresponding to an average sky
68 + computed over all the input time steps, rather than one
69 + column per time step.
70 + .PP
71 + The
72   .I \-c
73   option may be used to specify a color for the sky.
74 < The gray value should equal 1 for proper energy balance
74 > The gray value should equal 1 for proper energy balance.
75   The default sky color is
76   .I "\-c 0.960 1.004 1.118".
77   Similarly, the
# Line 61 | Line 83 | corresponding to a 20% gray.
83   .PP
84   The
85   .I \-d
86 < option may be used to produce a sun-only matrix, with no sky contributions.
86 > option may be used to produce a sun-only matrix, with no sky contributions,
87 > and the ground patch also set to zero.
88   Alternatively, the
89   .I \-s
90 < option may be used to exclude any direct solar component from the output.
90 > option may be used to exclude any direct solar component from the output,
91 > with the rest of the sky and ground patch unaffected.
92 > If there is a sun in the description,
93 > .I gendaymtx
94 > will include its contribution in the four nearest sky patches,
95 > distributing energy according to centroid proximity.
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 at all.
110 + This may be used to merely check the input, or in combination with the
111 + .I \-D
112 + option, below.
113 + .PP
114 + 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 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
140 + assumes the positive Y-axis points north such that the first sky patch
141 + is in the Y-axis direction on the horizon, the second patch is just
142 + west of that, and so on spiraling around to the final patch near the zenith.
143 + The
144 + .I \-r
145 + (or
146 + .I \-rz)
147 + option rotates the sky the specified number of degrees counter-clockwise
148 + about the zenith, i.e., west of north.
149 + This is in keeping with the effect of passing the output of
150 + .I gensky(1)
151 + or
152 + .I gendaylit(1)
153 + through
154 + .I xform(1)
155 + using a similar transform.
156 + .PP
157 + The
158   .I \-of
159   or
160   .I \-od
# Line 74 | Line 162 | option may be used to specify binary float or double o
162   This is much faster to write and to read, and is therefore preferred on
163   systems that support it.
164   (MS Windows is not one of them.)\0
165 + The
166 + .I \-O1
167 + option specifies that output should be total solar radiance rather
168 + than visible radiance.
169 + The
170 + .I \-h
171 + option prevents the output of the usual header information.
172   Finally, the
173   .I \-v
174   option will enable verbose reporting, which is mostly useful for
# Line 95 | Line 190 | Ian Ashdown wrote most of the code,
190   based on Jean-Jacques Delaunay's original gendaylit(1) implementation.
191   Greg Ward wrote the final parameter parsing and weather tape conversion.
192   .SH "SEE ALSO"
193 < dctimestep(1), genBSDF(1), gendaylit(1), genskyvec(1), rcontrib(1)
193 > dctimestep(1), genBSDF(1), gendaylit(1), gensky(1), genskyvec(1),
194 > rcollate(1), rcontrib(1), rfluxmtx(1), xform(1)

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines