Updated shaders with comments

shaders/glsl330/pixel.fs

@@ -1,13 +1,17 @@
 #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;
 
-// NOTE: Add here your custom variables 
+// Output fragment color
+out vec4 finalColor;
+
+// NOTE: Add here your custom variables
 
 const float renderWidth = 1280.0;
 const float renderHeight = 720.0;
@@ -24,5 +28,5 @@ void main()
 
     vec3 tc = texture(texture0, coord).rgb;
 
-    fragColor = vec4(tc, 1.0);
+    finalColor = vec4(tc, 1.0);
 }