From 9632289239bfd8bd8b8d061af1acb440fb211cbe Mon Sep 17 00:00:00 2001
From: Mouse <937279156@qq.com>
Date: Fri, 5 Oct 2018 18:13:07 +0800
Subject: [PATCH] Update index

---
 source/index.rst | 1 +
 1 file changed, 1 insertion(+)

diff --git a/source/index.rst b/source/index.rst
index fa2a8e7..c510124 100644
--- a/source/index.rst
+++ b/source/index.rst
@@ -20,6 +20,7 @@
    13-sky-box-and-some-optimizations
    14-height-maps
    15-terrain-collisions
+   16-fog
 
 本书原介绍
 ****