star-sf

commit 6293b156be2930277cdd4e76e299d2ddd054e2b8
parent f0533842d772e7f0502b067086d8d8dde803a098
Author: Vincent Forest <vincent.forest@meso-star.com>
Date:   Thu, 15 Nov 2018 15:32:10 +0100

Comment the pillbox microfacet distribution

Diffstat:
M
src/ssf.h
 | 
4
+++-

1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/src/ssf.h b/src/ssf.h
@@ -293,7 +293,9 @@ SSF_API const struct ssf_microfacet_distribution_type ssf_beckmann_distribution;
 SSF_API const struct ssf_microfacet_distribution_type ssf_blinn_distribution;
 
 /* Pillbox microfacet distribution.
- *    D(wh) = TODO comment this */
+ *            | 0; if |wh.N| >= m
+ *    D(wh) = | 1 / (PI * (1 - cos^2(m))); if |wh.N| < m
+ * with `m' the roughness parameter in ]0, 1] */
 SSF_API const struct ssf_microfacet_distribution_type ssf_pillbox_distribution;
 
 /*******************************************************************************