--- ray/doc/ray.html 2023/11/15 18:28:10 1.33
+++ ray/doc/ray.html 2023/12/12 20:25:22 1.37
@@ -1,5 +1,5 @@
-
+
The RADIANCE 6.0 Synthetic Imaging System
@@ -1482,14 +1482,12 @@ or:
</pre>
<p>
- The first two real arguments indicate the limits of the covered
+ The first two real arguments indicate the extrema of the
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 the nmB wavelength,
- but they may not be equal, and their ordering must correspond to
- the ordering of the spectral values.
+ Subsequent real values correspond to multipliers at each wavelength.
+ 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
@@ -1542,7 +1540,7 @@ or:
<pre>
mod specfunc id
- 2+ sval funcfile transform
+ 2+ sfunc funcfile transform
0
2+ nmA nmB A3 ..
</pre>
@@ -1550,7 +1548,7 @@ or:
<p>
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.
+ set in the evaluation context.
This function is fed a wavelenth sample
between nmA and nmB as its only argument,
and it returns the corresponding spectral intensity.