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Assets/Alloy/Shaders/Feature/Parallax.cginc

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+// Alloy Physical Shader Framework
+// Copyright 2013-2017 RUST LLC.
+// http://www.alloy.rustltd.com/
+
+/////////////////////////////////////////////////////////////////////////////////
+/// @file Parallax.cginc
+/// @brief Surface heightmap-based texcoord modification.
+/////////////////////////////////////////////////////////////////////////////////
+
+#ifndef ALLOY_SHADERS_FEATURE_PARALLAX_CGINC
+#define ALLOY_SHADERS_FEATURE_PARALLAX_CGINC
+
+#if !defined(A_PARALLAX_ON) && defined(_PARALLAXMAP)
+    #define A_PARALLAX_ON
+#endif
+
+#ifdef A_PARALLAX_ON
+    #ifndef A_VIEW_DIR_TANGENT_ON
+        #define A_VIEW_DIR_TANGENT_ON
+    #endif
+#endif
+
+#include "Assets/Alloy/Shaders/Framework/Feature.cginc"
+    
+#ifdef A_PARALLAX_ON    
+    /// Number of samples used for direct view of POM effect.
+    /// Expects values in the range [1,n].
+    float _MinSamples;
+    
+    /// Number of samples used for grazing view of POM effect.
+    /// Expects values in the range [1,n].
+    float _MaxSamples;
+#endif
+
+void aParallax(
+    inout ASurface s) 
+{
+#ifdef A_PARALLAX_ON
+    #ifndef _BUMPMODE_POM
+        aOffsetBumpMapping(s);
+    #else
+        aParallaxOcclusionMapping(s, _MinSamples, _MaxSamples);
+    #endif 
+#endif 
+}
+
+#endif // ALLOY_SHADERS_FEATURE_PARALLAX_CGINC