Add shaders

Sources/Shaders/GlobalSnowForwardOptions.cginc

@@ -0,0 +1,23 @@
+#ifndef GLOBALSNOW_FORWARD_OPTIONS
+#define GLOBALSNOW_FORWARD_OPTIONS
+
+// Uncomment to enable mask support on grass and trees in forward rendering path
+// #define GLOBALSNOW_MASK   
+
+// Comment out to disable zenithal depth
+#define USE_ZENITHAL_DEPTH
+
+
+// Comment out to enable VertExmotion integration. Also make sure the include path is correct.
+//#define ENABLE_VERTEXMOTION_INTEGRATION
+//#include "Assets/VertExmotion/Shaders/VertExmotion.cginc" 
+
+
+// ************* Common functions ******************
+#if defined(ENABLE_VERTEXMOTION_INTEGRATION)
+   #define APPLY_VERTEX_MODIFIER(v) v.vertex = VertExmotion( v.vertex, v.color );
+#else
+   #define APPLY_VERTEX_MODIFIER(v)
+#endif
+
+#endif