--- ray/doc/ray.html 2015/12/01 16:58:16 1.22
+++ ray/doc/ray.html 2016/07/10 23:41:37 1.23
@@ -1,5 +1,5 @@
-
+
The RADIANCE 5.1 Synthetic Imaging System
@@ -798,13 +798,35 @@ unless the line integrals consider enclosed geometry.
<dd>
Trans2 is the anisotropic version of <a HREF="#Trans">trans</a>.
- The string arguments are the same as for plastic2, and the real arguments are the same as for trans but with an additional roughness value.
+ The string arguments are the same as for <a HREF="#Plastic2">plastic2</a>,
+ and the real arguments are the same as for trans but with an additional roughness value.
<pre>
mod trans2 id
4+ ux uy uz funcfile transform
0
8 red green blue spec urough vrough trans tspec
+</pre>
+
+<p>
+
+<dt>
+ <a NAME="Ashik2">
+ <b>Ashik2</b>
+ </a>
+
+<dd>
+ Ashik2 is the anisotropic reflectance model by Ashikhmin & Shirley.
+ The string arguments are the same as for <a HREF="#Plastic2">plastic2</a>, but the real
+ arguments have additional flexibility to specify the specular color.
+ Also, rather than roughness, specular power is used, which has no
+ physical meaning other than larger numbers are equivalent to a smoother
+ surface.
+<pre>
+ mod ashik2 id
+ 4+ ux uy uz funcfile transform
+ 0
+ 8 dred dgrn dblu sred sgrn sblu u-power v-power
</pre>
<p>