[ViewVC] Diff of: radiance/ray/doc/ray.1

Comparing ray/doc/ray.1 (file contents):
Revision 1.39 by greg, Thu May 11 17:18:39 2023 UTC vs.
Revision 1.42 by greg, Thu Nov 16 21:57:39 2023 UTC

+.\" RCSid "$Id$"
+.\" Print using the -ms macro package
-<
+.DA 5/11/2023
->
+.DA 11/13/2023
+.LP
+.tl """Copyright \(co 2023 Regents, University of California
+.sp 2
+font such as hexbit4x1.fnt, calls for uniform spacing.
+Reasonable magnitudes for proportional spacing are
+between 0.1 (for tightly spaced characters) and 0.3 (for wide spacing).
-+
+.LP
-+
+.UL Spectrum
-+
+.PP
-+
+The spectrum primitive is the most basic type for introducing spectral
-+
+color to a material.
-+
+Since materials only provide RGB parameters, spectral patterns
-+
+are the only way to superimpose wavelength-dependent behavior.
-+
+.DS
-+
+mod spectrum id
-+
-+
-+
++ nmA nmB s1 s2 .. sN
-+
+.DE
-+
+The first two real arguments indicate the limits of the covered
-+
+spectral range in nanometers.
-+
+Subsequent real values correspond to multipliers in each wavelength band,
-+
+where the first band goes from nmA to nmA+(nmB-nmA)/N, and N is the
-+
+number of bands (i.e., the number of real arguments minus 2).
-+
+The nmA wavelength may be greater or less than nmB,
-+
+but they may not be equal, and their ordering matches
-+
+the order of the spectral values.
-+
+A minimum of 3 values must be given, which would act
-+
+more or less the same as a constant RGB multiplier.
-+
+As with RGB values, spectral quantities normally range between 0
-+
+and 1 at each wavelength, or average to 1.0 against a standard
-+
+sensitivity functions such as V(lambda).
-+
+The best results obtain when the spectral range and number
-+
+of samples match rendering options, though resampling will handle
-+
+any differences, zero-filling wavelenths outside the nmA to nmB
-+
+range.
-+
+A warning will be issued if the given wavelength range does not
-+
+adequately cover the visible spectrum.
-+
+.LP
-+
+.UL Specfile
-+
+.PP
-+
+The specfile primitive is equivalent to the spectrum type, but
-+
+the wavelength range and values are contained in a 1-dimensional
-+
+data file.
-+
+This may be a more convenient way to specify a spectral color,
-+
+especially one corresponding to a standard illuminant such as D65
-+
+or a library of measured spectra.
-+
+.DS
-+
+mod specfile id
-+
+datafile
-+
-+
-+
+.DE
-+
+As with the spectrum type, rendering wavelengths outside the defined
-+
+range will be zero-filled.
-+
+Unlike the spectrum type, the file may contain non-uniform samples.
-+
+.LP
-+
+.UL Specfunc
-+
+.PP
-+
+The specfunc primitive offers dynamic control over a spectral
-+
+pattern, similar to the colorfunc type.
-+
+.DS
-+
+mod specfunc id
-+
++ sval funcfile transform
-+
-+
++ nmA nmB A3 ..
-+
+.DE
-+
+Like the spectrum primitive, the wavelength range is specified
-+
+in the first two real arguments, and additional real values are
-+
+accessible to the sval function.
-+
+This function is fed a wavelenth sample
-+
+between nmA and nmB as its only argument,
-+
+and it returns the corresponding spectral intensity.
+.NH 3
+Mixtures
+.PP
+in Lausanne, Switzerland.
+.NH 1
+References
-+
+.LP
-+
+Ward, Gregory J., Bruno Bueno, David Geisler-Moroder,
-+
+Lars O. Grobe, Jacob C. Jonsson, Eleanor
-+
+S. Lee, Taoning Wang, Helen Rose Wilson,
-+
+``Daylight Simulation Workflows Incorporating
-+
+Measured Bidirectional Scattering Distribution Functions,''
-+
+.I "Energy & Buildings",
-+
+Vol. 259, No. 111890, 2022.
+.LP
+Wang, Taoning, Gregory Ward, Eleanor Lee,
+``Efficient modeling of optically-complex, non-coplanar

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Comparing ray/doc/ray.1 (file contents): Revision 1.39 by greg, Thu May 11 17:18:39 2023 UTC vs. Revision 1.42 by greg, Thu Nov 16 21:57:39 2023 UTC

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Comparing ray/doc/ray.1 (file contents):
Revision 1.39 by greg, Thu May 11 17:18:39 2023 UTC vs.
Revision 1.42 by greg, Thu Nov 16 21:57:39 2023 UTC