From 547c6064f6a8ab2749f496ce7ea2856e8cc1bcda Mon Sep 17 00:00:00 2001
From: yum <yum.food.vr@gmail.com>
Date: Tue, 18 Feb 2025 16:35:22 -0800
Subject: Add matcaps and rim lighting

* Add min brightness
* MainTex and BumpMap can be independently tiled
* Fix outlines
* Remove lightDirTS (unused)
* Normalize i.normal in pixel shader
* Elide unused AO when locked
* Wrap lines at 80 columns
---
 2ner.cginc | 30 +++++++++++++++++++-----------
 1 file changed, 19 insertions(+), 11 deletions(-)

(limited to '2ner.cginc')

diff --git a/2ner.cginc b/2ner.cginc
index e76ba51..bc5f7f3 100644
--- a/2ner.cginc
+++ b/2ner.cginc
@@ -7,12 +7,19 @@
 #include "features.cginc"
 #include "globals.cginc"
 #include "interpolators.cginc"
+#include "matcaps.cginc"
 #include "poi.cginc"
 #include "yum_brdf.cginc"
 #include "yum_pbr.cginc"
 #include "yum_lighting.cginc"
 
 v2f vert(appdata v) {
+#if defined(OUTLINE_PASS) && !defined(_OUTLINES)
+  // The outline pass will be entirely elided when locked. This just lets us
+  // hide outlines when not locked.
+  return (v2f) (0.0/0.0);
+#endif
+
   v2f o;
 
   UNITY_SETUP_INSTANCE_ID(v);
@@ -30,23 +37,17 @@ v2f vert(appdata v) {
   v.normal *= -1;
   v.tangent *= -1;
 #endif  // OUTLINE_PASS
+
   o.pos = UnityObjectToClipPos(v.vertex);
-  o.uv01.xy = TRANSFORM_TEX(v.uv01.xy, _MainTex);
-  o.uv01.zw = TRANSFORM_TEX(v.uv01.zw, _MainTex);
+  o.uv01 = v.uv01;
   o.worldPos = mul(unity_ObjectToWorld, v.vertex);
   o.eyeVec.xyz = normalize(o.worldPos - _WorldSpaceCameraPos);
 
-  // Calculate TBN matrix
+  // These are used to convert normals from tangent space to world space.
   o.normal = UnityObjectToWorldNormal(v.normal);
   o.tangent = UnityObjectToWorldDir(v.tangent.xyz);
-  o.binormal = cross(o.normal, o.tangent) * v.tangent.w * unity_WorldTransformParams.w;
-
-  // From filamented
-  float3 lightDirWS = normalize(_WorldSpaceLightPos0.xyz - o.worldPos * _WorldSpaceLightPos0.w);
-  o.lightDirTS = float3(
-    dot(o.tangent,  lightDirWS),
-    dot(o.binormal, lightDirWS),
-    dot(o.normal,   lightDirWS));
+  o.binormal = cross(o.normal, o.tangent) * v.tangent.w *
+    unity_WorldTransformParams.w;
 
   UNITY_TRANSFER_LIGHTING(o, v.uv1);
   UNITY_TRANSFER_FOG_COMBINED_WITH_EYE_VEC(o, o.pos);
@@ -61,6 +62,9 @@ float4 frag(v2f i) : SV_Target {
   UNITY_SETUP_INSTANCE_ID(i);
   UNITY_SETUP_STEREO_EYE_INDEX_POST_VERTEX(i);
 
+  // Not necessarily normalized after interpolation
+  i.normal = normalize(i.normal);
+
   YumPbr pbr = GetYumPbr(i);
 
   UNITY_BRANCH
@@ -69,6 +73,10 @@ float4 frag(v2f i) : SV_Target {
     pbr.albedo.a = 1;
   }
 
+#if defined(FORWARD_BASE_PASS)
+  applyMatcapsAndRimLighting(i, pbr);
+#endif
+
 #if defined(FORWARD_BASE_PASS) || defined(FORWARD_ADD_PASS) || defined(OUTLINE_PASS)
   YumLighting l = GetYumLighting(i, pbr);
 
-- 
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