From 6cb15b3647435fbba41ed09f7f7017f0141de279 Mon Sep 17 00:00:00 2001
From: Sam Hocevar <sam@hocevar.net>
Date: Sat, 1 Sep 2012 10:32:55 +0000
Subject: [PATCH] tutorial: add some cosmetic white noise.

---
 tutorial/03_noise.lolfx | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/tutorial/03_noise.lolfx b/tutorial/03_noise.lolfx
index 871ad20e..861930c8 100644
--- a/tutorial/03_noise.lolfx
+++ b/tutorial/03_noise.lolfx
@@ -88,7 +88,10 @@ float noise3d(vec3 p)
 void main(void)
 {
     vec2 tmp = pass_Rotation * pass_Position;
-    float test = tmp.x * tmp.y + 0.75 * sin(3.0 * u_Time);
+    float test = tmp.x * tmp.y + sin(3.0 * u_Time);
+
+    /* Add some garbage noise */
+    test += fract(sin(test * 938.437) * 137.0) / 2.0;
 
     vec3 points[4] = (test > 0.0) ? fire : water;