1 files changed, 61 insertions, 0 deletions

diff --git a/VRCSDK3AvatarsLegacy/Assets/_PoiyomiShaders/Shaders/Includes/CGI_PoiIridescence.cginc b/VRCSDK3AvatarsLegacy/Assets/_PoiyomiShaders/Shaders/Includes/CGI_PoiIridescence.cginc
new file mode 100644
index 00000000..47d5624f
--- /dev/null
+++ b/VRCSDK3AvatarsLegacy/Assets/_PoiyomiShaders/Shaders/Includes/CGI_PoiIridescence.cginc
@@ -0,0 +1,61 @@
+#ifndef POI_IRIDESCENCE
+    #define POI_IRIDESCENCE
+    
+    UNITY_DECLARE_TEX2D_NOSAMPLER(_IridescenceRamp); float4 _IridescenceRamp_ST;
+    UNITY_DECLARE_TEX2D_NOSAMPLER(_IridescenceMask); float4 _IridescenceMask_ST;
+    UNITY_DECLARE_TEX2D_NOSAMPLER(_IridescenceNormalMap); float4 _IridescenceNormalMap_ST;
+    uint _IridescenceNormalUV;
+    uint _IridescenceMaskUV;
+    uint _IridescenceNormalSelection;
+    float _IridescenceNormalIntensity;
+    float _IridescenceNormalToggle;
+    float _IridescenceIntensity;
+    fixed _IridescenceAddBlend;
+    fixed _IridescenceReplaceBlend;
+    fixed _IridescenceMultiplyBlend;
+    float _IridescenceEmissionStrength;
+    
+    //global
+    
+    float3 calculateNormal(float3 baseNormal)
+    {
+        float3 normal = UnpackScaleNormal(UNITY_SAMPLE_TEX2D_SAMPLER(_IridescenceNormalMap, _MainTex, TRANSFORM_TEX(poiMesh.uv[_IridescenceNormalUV], _IridescenceNormalMap)), _IridescenceNormalIntensity);
+        return normalize(
+            normal.x * poiMesh.tangent +
+            normal.y * poiMesh.binormal +
+            normal.z * baseNormal
+        );
+    }
+    
+    float3 applyIridescence(inout float4 albedo)
+    {
+        float3 normal = poiMesh.normals[_IridescenceNormalSelection];
+        
+        // Use custom normal map
+        UNITY_BRANCH
+        if (_IridescenceNormalToggle)
+        {
+            normal = calculateNormal(normal);
+        }
+        
+        float ndotv = dot(normal, poiCam.viewDir);
+        
+        float4 iridescenceColor = UNITY_SAMPLE_TEX2D_SAMPLER(_IridescenceRamp, _MainTex, 1 - abs(ndotv));
+        float4 iridescenceMask = UNITY_SAMPLE_TEX2D_SAMPLER(_IridescenceMask, _MainTex, TRANSFORM_TEX(poiMesh.uv[_IridescenceMaskUV], _IridescenceMask));
+        
+        #ifdef POI_BLACKLIGHT
+            if(_BlackLightMaskIridescence != 4)
+            {
+                iridescenceMask *= blackLightMask[_BlackLightMaskIridescence];
+            }
+        #endif
+        
+        
+        albedo.rgb = lerp(albedo.rgb, saturate(iridescenceColor.rgb * _IridescenceIntensity), iridescenceColor.a * _IridescenceReplaceBlend * iridescenceMask);
+        albedo.rgb += saturate(iridescenceColor.rgb * _IridescenceIntensity * iridescenceColor.a * _IridescenceAddBlend * iridescenceMask);
+        albedo.rgb *= saturate(lerp(1, iridescenceColor.rgb * _IridescenceIntensity, iridescenceColor.a * _IridescenceMultiplyBlend * iridescenceMask));
+        
+        return saturate(iridescenceColor.rgb * _IridescenceIntensity) * iridescenceColor.a * iridescenceMask * _IridescenceEmissionStrength;
+    }
+    
+#endif
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