From 37151f8b33ba2dfa83d7f387492d203a5a13d1c6 Mon Sep 17 00:00:00 2001
From: David Thompson <dthompson2@worcester.edu>
Date: Mon, 10 May 2021 17:18:52 -0400
Subject: graphics: pbr: Add comments to fragment shader.

---
 data/shaders/pbr-frag.glsl | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/data/shaders/pbr-frag.glsl b/data/shaders/pbr-frag.glsl
index 4573eaf..4c569fc 100644
--- a/data/shaders/pbr-frag.glsl
+++ b/data/shaders/pbr-frag.glsl
@@ -52,15 +52,15 @@ vec4 sampleTexture(sampler2D tex, bool enabled, int texcoord, vec3 factor, vec4
 
 vec4 applyAlpha(vec4 color) {
   // Apply alpha mode.
-  if(material.alphaMode == 0) {
+  if(material.alphaMode == 0) { // opaque
     return vec4(color.xyz, 1.0);
-  } else if(material.alphaMode == 1) {
+  } else if(material.alphaMode == 1) { // mask
     if(color.a >= material.alphaCutoff) {
       return vec4(color.xyz, 1.0);
     } else {
       discard;
     }
-  } else if(material.alphaMode == 2) {
+  } else if(material.alphaMode == 2) { // blend
     if(color.a <= 0.005) {
       discard;
     } else {
-- 
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