add : unabomber scene

Assets/_Content/Shaders/Include/PortalMeadowRegion.hlsl

@@ -0,0 +1,19 @@
+#ifndef PORTAL_MEADOW_REGION_INCLUDED
+#define PORTAL_MEADOW_REGION_INCLUDED
+// Uniforms are supplied by each shader's UnityPerMaterial buffer.
+float MeadowRegionFade(float3 originalWS)
+{
+    if (_MeadowRegion.w <= 0) return 1;
+    float3 local = mul(_MeadowWorldToLocal, float4(originalWS, 1)).xyz;
+    float distanceToEdge = _MeadowRegion.w - length(local.xz - _MeadowRegion.xz);
+    clip(distanceToEdge);
+    return saturate(distanceToEdge / max(_MeadowEdgeFade, 0.001));
+}
+float ClipMeadowRegion(float3 originalWS, float2 pixel)
+{
+    float fade = MeadowRegionFade(originalWS);
+    float threshold = frac(52.9829189 * frac(dot(floor(pixel), float2(0.06711056, 0.00583715))));
+    clip(fade - threshold);
+    return fade;
+}
+#endif