Reviewed shader

examples/shaders/resources/shaders/glsl100/raymarching.fs

@@ -38,7 +38,7 @@ uniform vec2 resolution;
 //
 // More info here: http://www.iquilezles.org/www/articles/distfunctions/distfunctions.htm
 
-#define AA 1   // make this 1 is your machine is too slow
+#define AA 1   // make this 1 if your machine is too slow
 
 //------------------------------------------------------------------
 

examples/shaders/resources/shaders/glsl120/raymarching.fs

@@ -1,32 +1,8 @@
-// The MIT License
-// Copyright © 2013 Inigo Quilez
-// Permission is hereby granted, free of charge, to any person obtaining a copy
-// of this software and associated documentation files (the "Software"), to deal
-// in the Software without restriction, including without limitation the rights
-// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-// copies of the Software, and to permit persons to whom the Software is
-// furnished to do so, subject to the following conditions:
-
-// The above copyright notice and this permission notice shall be included in all
-// copies or substantial portions of the Software.
-
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-// SOFTWARE.
-
-// A list of useful distance function to simple primitives, and an example on how to
-// do some interesting boolean operations, repetition and displacement.
-//
-// More info here: http://www.iquilezles.org/www/articles/distfunctions/distfunctions.htm
-
 #version 120
 
 // Input vertex attributes (from vertex shader)
 varying vec2 fragTexCoord;
+varying vec4 fragColor;
 
 uniform vec3 viewEye;
 uniform vec3 viewCenter;