From cc54dca9cd98ca7020ccc8768a51d78ab117da79 Mon Sep 17 00:00:00 2001
From: yum <yum.food.vr@gmail.com>
Date: Wed, 6 Aug 2025 16:50:12 -0700
Subject: more cleanup; add mesh normals

---
 3ner.cginc | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

(limited to '3ner.cginc')

diff --git a/3ner.cginc b/3ner.cginc
index bfaeded..00d98a0 100644
--- a/3ner.cginc
+++ b/3ner.cginc
@@ -29,6 +29,9 @@ v2f vert(appdata v) {
     o.objPos = v.vertex;
     o.worldPos = mul(unity_ObjectToWorld, v.vertex);
     o.eyeVec.xyz = o.worldPos.xyz - _WorldSpaceCameraPos;
+    o.normal = UnityObjectToWorldNormal(v.normal);
+    o.tangent.xyz = UnityObjectToWorldNormal(v.tangent.xyz);
+    o.tangent.w = v.tangent.w;
 
   UNITY_TRANSFER_LIGHTING(o, v.uv1);
   UNITY_TRANSFER_FOG_COMBINED_WITH_EYE_VEC(o, o.pos);
@@ -146,6 +149,9 @@ v2f domain(
   o.objPos   = DOMAIN_INTERP(objPos);
 #endif
 
+  o.normal = DOMAIN_INTERP(normal);
+  o.tangent = DOMAIN_INTERP(tangent);
+
   o.worldPos   = mul(unity_ObjectToWorld, float4(o.objPos, 1));
   o.pos        = UnityObjectToClipPos(o.objPos);
   o.eyeVec.xyz = o.worldPos - _WorldSpaceCameraPos;
@@ -155,7 +161,8 @@ v2f domain(
   return o;
 }
 
-float4 frag(v2f i) : SV_Target {
+float4 frag(v2f i, uint facing : SV_IsFrontFace) : SV_Target {
+  i.normal *= facing ? 1 : -1;
   Pbr pbr = getPbr(i);
   LightData light_data;
   GetLighting(i, pbr, light_data);
-- 
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