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diff --git a/OpenSim/Region/PhysicsModules/ConvexDecompositionDotNet/int4.cs b/OpenSim/Region/PhysicsModules/ConvexDecompositionDotNet/int4.cs
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+++ b/OpenSim/Region/PhysicsModules/ConvexDecompositionDotNet/int4.cs
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+/* The MIT License
+ * 
+ * Copyright (c) 2010 Intel Corporation.
+ * All rights reserved.
+ *
+ * Based on the convexdecomposition library from 
+ * <http://codesuppository.googlecode.com> by John W. Ratcliff and Stan Melax.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+using System;
+
+namespace OpenSim.Region.PhysicsModule.ConvexDecompositionDotNet
+{
+    public class int4
+    {
+        public int x;
+        public int y;
+        public int z;
+        public int w;
+
+        public int4()
+        {
+        }
+
+        public int4(int _x, int _y, int _z, int _w)
+        {
+            x = _x;
+            y = _y;
+            z = _z;
+            w = _w;
+        }
+
+        public int this[int i]
+        {
+            get
+            {
+                switch (i)
+                {
+                    case 0: return x;
+                    case 1: return y;
+                    case 2: return z;
+                    case 3: return w;
+                }
+                throw new ArgumentOutOfRangeException();
+            }
+        }
+    }
+}