From e7d81ce7cc9efe59abf5c36abcf1b05eda4e57b7 Mon Sep 17 00:00:00 2001
From: griffi-gh <prasol258@gmail.com>
Date: Mon, 13 May 2024 23:56:31 +0200
Subject: [PATCH] add the old "lighting" thingy

---
 kubi/shaders/world.wgsl | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/kubi/shaders/world.wgsl b/kubi/shaders/world.wgsl
index ed5d35d..96b54a7 100644
--- a/kubi/shaders/world.wgsl
+++ b/kubi/shaders/world.wgsl
@@ -39,10 +39,20 @@ var s_diffuse: sampler;
 
 @fragment
 fn fs_main(in: VertexOutput) -> @location(0) vec4<f32> {
-  let color: vec4<f32> = textureSample(t_diffuse, s_diffuse, in.uv, in.tex_index);
+  // not actual lighting; makes it easier to distinguish unlit faces
+  let light: f32 =
+    abs(in.normal.x) + .85 *
+    abs(in.normal.y) + .65 *
+    abs(in.normal.z);
+
+  let color: vec4<f32> =
+    textureSample(t_diffuse, s_diffuse, in.uv, in.tex_index)
+    * vec4<f32>(light, light, light, 1.0);
+
   if (color.a < 0.5) {
     discard;
   }
+
   return color;
 }