From b1d0bbdfb66a6486173de7a5ec29a81f0b712d41 Mon Sep 17 00:00:00 2001
From: Adrian G L <adrian@lauterer.it>
Date: Thu, 2 Oct 2025 01:04:21 +0200
Subject: [PATCH] feat: visualize vertex normals as colors by passing normals
 to fragment shader

---
 shaders/simple.frag | 3 ++-
 shaders/simple.vert | 3 +++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/shaders/simple.frag b/shaders/simple.frag
index 223ad88..9cf5805 100644
--- a/shaders/simple.frag
+++ b/shaders/simple.frag
@@ -3,7 +3,8 @@
 out layout(location=0) vec4 color;
 in vec4 gl_FragCoord;
 in vec4 vColor;
+in vec3 vNormal;
 
 void main() {
-    color = vColor;
+    color = vec4(vNormal, 1.0);
 }
diff --git a/shaders/simple.vert b/shaders/simple.vert
index 7eb80e9..568b9d2 100644
--- a/shaders/simple.vert
+++ b/shaders/simple.vert
@@ -2,10 +2,13 @@
 
 in layout(location=0) vec3 position;
 in layout(location=1) vec4 aColor;
+in layout(location=2) vec3 aNormal;
 out vec4 vColor;
+out vec3 vNormal;
 layout(location = 0) uniform mat4 transform;
 
 void main() {
     gl_Position = transform * vec4(position, 1.0f);
     vColor = aColor;
+    vNormal = aNormal;
 }