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Packages/com.jbooth.microsplat.core/Scripts/MicroSplatRuntimeUtil.cs

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+//////////////////////////////////////////////////////
+// MicroSplat
+// Copyright (c) Jason Booth
+//////////////////////////////////////////////////////
+
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+namespace JBooth.MicroSplat
+{
+   public class MicroSplatRuntimeUtil 
+   {
+      // convert to/from regular UVs to terrain UVs, which are expressed in units per tile instead of tiles per terrain
+      public static Vector2 UnityUVScaleToUVScale(Vector2 uv, Terrain t)
+      {
+         float w = t.terrainData.size.x;
+         float h = t.terrainData.size.z;
+         uv.x = 1.0f / (uv.x / w);
+         uv.y = 1.0f / (uv.y / h);
+         return uv;
+      }
+
+      public static Vector2 UVScaleToUnityUVScale(Vector2 uv, Terrain t)
+      {
+         float w = t.terrainData.size.x;
+         float h = t.terrainData.size.z;
+
+         if (uv.x < 0)
+            uv.x = 0.001f;
+         if (uv.y < 0)
+            uv.y = 0.001f;
+
+         uv.x = w/uv.x;              
+         uv.y = h/uv.y;
+         return uv;
+      }
+   }
+}