From 76afedd3fd6fa4f600eaa4902801a76fcaf2b8ad Mon Sep 17 00:00:00 2001
From: "Robert D. Vincent" <robert.d.vincent@mcgill.ca>
Date: Fri, 18 Nov 2016 09:57:44 -0500
Subject: [PATCH] Add a comment about sparse colour maps.

---
 src/brainbrowser/lib/color-map.js | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/brainbrowser/lib/color-map.js b/src/brainbrowser/lib/color-map.js
index a79bc62e..9742e249 100644
--- a/src/brainbrowser/lib/color-map.js
+++ b/src/brainbrowser/lib/color-map.js
@@ -76,6 +76,11 @@
         if (line_length < 3) continue;
 
         if (line_length > 4) {
+          /* Sparse colour map. The first column gives the
+           * label to associate with the colour, the remaining
+           * 4 columns give the RGBA values to associate with
+           * the label.
+           */
           ic = parseInt(color[0], 10);
           ic *= 4;
           line_length = 4;