From ad79981dfddd3f787011334490d137e0a9a0ffb8 Mon Sep 17 00:00:00 2001
From: yum <yum.food.vr@gmail.com>
Date: Mon, 27 May 2024 23:08:18 -0700
Subject: Add controls for shadow strength & mipmap selection

---
 pbr.cginc | 31 ++++++++++++++++++++++++++++++-
 1 file changed, 30 insertions(+), 1 deletion(-)

(limited to 'pbr.cginc')

diff --git a/pbr.cginc b/pbr.cginc
index 0ff3bd1..801f87a 100644
--- a/pbr.cginc
+++ b/pbr.cginc
@@ -12,7 +12,37 @@ UNITY_DECLARE_TEXCUBE(_Cubemap);
 
 UnityLight CreateDirectLight(float3 normal, float ao, v2f i)
 {
+#if 1
+  // This whole block is yoinked from AutoLight.cginc. I needed a way to
+  // control shadow strength so I had to duplicate the code.
+#if defined(DIRECTIONAL_COOKIE)
+  DECLARE_LIGHT_COORD(i, i.worldPos);
+  float shadow = UNITY_SHADOW_ATTENUATION(i, i.worldPos);
+  float attenuation = tex2D(_LightTexture0, lightCoord).w;
+#elif defined(POINT_COOKIE)
+  DECLARE_LIGHT_COORD(i, i.worldPos);
+  float shadow = UNITY_SHADOW_ATTENUATION(i, i.worldPos);
+  float attenuation = tex2D(_LightTextureB0, dot(lightCoord, lightCoord).rr).r *
+    texCUBE(_LightTexture0, lightCoord).w;
+#elif defined(DIRECTIONAL)
+  float shadow = UNITY_SHADOW_ATTENUATION(i, i.worldPos);
+  float attenuation = 1;
+#elif defined(SPOT)
+  DECLARE_LIGHT_COORD(i, i.worldPos);
+  float shadow = UNITY_SHADOW_ATTENUATION(i, i.worldPos);
+  float attenuation = (lightCoord.z > 0) * UnitySpotCookie(lightCoord) * UnitySpotAttenuate(lightCoord.xyz);
+#elif defined(POINT)
+  unityShadowCoord3 lightCoord = mul(unity_WorldToLight, unityShadowCoord4(i.worldPos, 1)).xyz;
+  float shadow = UNITY_SHADOW_ATTENUATION(i, i.worldPos);
+  float attenuation = tex2D(_LightTexture0, dot(lightCoord, lightCoord).rr).r;
+#else
+  float shadow = 1;
+  float attenuation = 1;
+#endif
+  attenuation *= lerp(1, shadow, _Shadow_Strength);
+#else
   UNITY_LIGHT_ATTENUATION(attenuation, i, i.worldPos);
+#endif
 
   UnityLight light;
   light.color = _LightColor0.rgb * attenuation * ao;
@@ -22,7 +52,6 @@ UnityLight CreateDirectLight(float3 normal, float ao, v2f i)
   light.dir = _WorldSpaceLightPos0;
 #endif
 
-
   if (round(_Confabulate_Normals)) {
     light.dir = normal;
   }
-- 
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