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Comparing ray/doc/man/man1/pvsum.1 (file contents):
Revision 1.3 by greg, Fri Mar 28 16:36:31 2025 UTC vs.
Revision 1.4 by greg, Thu May 22 21:39:42 2025 UTC

# Line 92 | Line 92 | gensdaymtx -of sfo.epw | pvsum -o timestep%04d.hsr -N
92   .SH NOTES
93   This tool overlaps with
94   .I dctimestep,
95 < but provides some important capabilities.
96 < First,
95 > but provides some missing capabilities.
96 > Foremost,
97   .I pvsum
98   reads and can produce spectral pictures and matrices, whereas
99   .I dctimestep
100   expects and requires 3-component pictures and matrices throughout.
101 < Changing the data structures in
102 < .I dctimestep
103 < proved too difficult and likely to
104 < lead to a less efficient implementation, especially on systems with
105 < limited memory.
106 < In contrast,
101 > In addition,
102   .I pvsum
103   accelerates picture sums on Unix systems with more
104 < memory and processint ability.
105 < Second, operation was simplified by focusing on the Daylight Coefficient
104 > memory and CPU cores.
105 > Operations were simplified by focusing on the Daylight Coefficient
106   command form, where the DC matrix is represented as a collection of
107   pictures.
108 < By excluding the other operation modes of
109 < .I dctimestep,
110 < new functionality could be explored and optimized,
111 < such as floating-point support and
117 < sending output to commands as well as files.
108 > Finally,
109 > .I pvsum
110 > offers more flexible floating-point support and
111 > can output to commands as well as files.
112   .SH AUTHOR
113   Greg Ward
114   .SH "SEE ALSO"

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