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Assets/Alloy/Shaders/Feature/Transmission.cginc

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+// Alloy Physical Shader Framework
+// Copyright 2013-2017 RUST LLC.
+// http://www.alloy.rustltd.com/
+
+/////////////////////////////////////////////////////////////////////////////////
+/// @file Transmission.cginc
+/// @brief Basic transmission, handling render path differences.
+/////////////////////////////////////////////////////////////////////////////////
+
+#ifndef ALLOY_SHADERS_FEATURE_TRANSMISSION_CGINC
+#define ALLOY_SHADERS_FEATURE_TRANSMISSION_CGINC
+
+#ifdef A_TRANSMISSION_ON
+    #ifndef A_SUBSURFACE_ON
+        #define A_SUBSURFACE_ON
+    #endif
+#endif
+
+#include "Assets/Alloy/Shaders/Framework/Feature.cginc"
+
+#ifdef A_TRANSMISSION_ON
+    /// Transmission tint color.
+    /// Expects a linear LDR color.
+    half3 _TransColor;
+
+    /// Transmission color * thickness texture.
+    /// Expects an RGB map with sRGB sampling.
+    sampler2D _TransTex;
+
+    /// Weight of the transmission effect.
+    /// Expects linear-space values in the range [0,1].
+    half _TransScale;
+#endif
+
+void aTransmission(
+    inout ASurface s) 
+{
+#ifdef A_TRANSMISSION_ON
+    s.subsurfaceColor = A_SSC(s, _TransScale * tex2D(_TransTex, s.baseUv).rgb);
+    s.subsurfaceColor *= _TransColor;
+#endif
+} 
+
+#endif // ALLOY_SHADERS_FEATURE_TRANSMISSION_CGINC