From bc08271da3e68d2880f4ef712c13e88b99f1021d Mon Sep 17 00:00:00 2001
From: raysan5 <raysan5@gmail.com>
Date: Wed, 18 May 2016 12:04:27 +0200
Subject: Updated shaders with comments

---
 shaders/glsl330/scanlines.fs | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

(limited to 'shaders/glsl330/scanlines.fs')

diff --git a/shaders/glsl330/scanlines.fs b/shaders/glsl330/scanlines.fs
index 0c89e610..177f000d 100644
--- a/shaders/glsl330/scanlines.fs
+++ b/shaders/glsl330/scanlines.fs
@@ -1,12 +1,16 @@
 #version 330
 
+// Input vertex attributes (from vertex shader)
 in vec2 fragTexCoord;
+in vec4 fragColor;
 
-out vec4 fragColor;
-
+// Input uniform values
 uniform sampler2D texture0;
 uniform vec4 fragTintColor;
 
+// Output fragment color
+out vec4 finalColor;
+
 // NOTE: Add here your custom variables
 
 float offset = 0.0;
@@ -14,7 +18,7 @@ float frequency = 720.0/3.0;
 
 uniform float time;
 
-void main (void)
+void main()
 {
 /*
     // Scanlines method 1
@@ -35,7 +39,8 @@ void main (void)
     float globalPos = (fragTexCoord.y + offset) * frequency;
     float wavePos = cos((fract(globalPos) - 0.5)*3.14);
     
-    vec4 color = texture(texture0, fragTexCoord);
+    // Texel color fetching from texture sampler
+    vec4 texelColor = texture(texture0, fragTexCoord);
 
-    fragColor = mix(vec4(0.0, 0.3, 0.0, 0.0), color, wavePos);
+    finalColor = mix(vec4(0.0, 0.3, 0.0, 0.0), texelColor, wavePos);
 }
\ No newline at end of file
-- 
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