From 56fecdd8589298605df97d98463ccd7823609fa1 Mon Sep 17 00:00:00 2001
From: clayjohn <clayjohn@shaw.ca>
Date: Mon, 30 Jul 2018 16:52:40 -0700
Subject: [PATCH] fixed height variable typo in fbm function

---
 tutorials/3d/vertex_displacement_with_shaders.rst | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tutorials/3d/vertex_displacement_with_shaders.rst b/tutorials/3d/vertex_displacement_with_shaders.rst
index 53ffcd902..036924db2 100644
--- a/tutorials/3d/vertex_displacement_with_shaders.rst
+++ b/tutorials/3d/vertex_displacement_with_shaders.rst
@@ -194,11 +194,11 @@ we increase the frequency each level, decrease the amplitude, and calculate a ne
     float amplitude = 0.5;
     float frequency = 3.0;
     for (int i = 0; i < 6; i++){
-      h += noise(x * frequency) * amplitude;
+      height += noise(x * frequency) * amplitude;
       amplitude *= 0.5;
       frequency *= 2.0;
     }
-    return h;
+    return height;
   }
 
 We can now use this noise function in place of ``cos`` and ``sin`` in the previous section.