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Assets/Alloy/Mods/Shaders/Definition/CurvatureTest.cginc

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+// Alloy Physical Shader Framework
+// Copyright 2013-2017 RUST LLC.
+// http://www.alloy.rustltd.com/
+
+/////////////////////////////////////////////////////////////////////////////////
+/// @file Unlit.cginc
+/// @brief Unlit surface shader definition.
+/////////////////////////////////////////////////////////////////////////////////
+
+#ifndef ALLOY_MODS_SHADERS_DEFINITION_UNLIT_CGINC
+#define ALLOY_MODS_SHADERS_DEFINITION_UNLIT_CGINC
+
+#define A_POSITION_WORLD_ON
+#define A_NORMAL_WORLD_ON
+#define A_EMISSIVE_COLOR_ON
+
+#include "Assets/Alloy/Shaders/Lighting/Unlit.cginc"
+#include "Assets/Alloy/Shaders/Type/Standard.cginc"
+
+half _CurvatureScale;
+
+void aSurfaceShader(
+    inout ASurface s)
+{
+    // Otherwise stick with ddx or dFdx, which can be replaced with fwidth.
+    float deltaWorldNormal = length(fwidth(s.normalWorld));
+    float deltaWorldPosition = length(fwidth(s.positionWorld));
+
+    s.emissiveColor = ((deltaWorldNormal / deltaWorldPosition) * _CurvatureScale).rrr;
+}
+
+#endif // ALLOY_MODS_SHADERS_DEFINITION_UNLIT_CGINC