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diff --git a/extern/solid/include/MT_Vector3.h b/extern/solid/include/MT_Vector3.h
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+++ b/extern/solid/include/MT_Vector3.h
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+/*
+ * SOLID - Software Library for Interference Detection
+ * 
+ * Copyright (C) 2001-2003  Dtecta.  All rights reserved.
+ *
+ * This library may be distributed under the terms of the Q Public License
+ * (QPL) as defined by Trolltech AS of Norway and appearing in the file
+ * LICENSE.QPL included in the packaging of this file.
+ *
+ * This library may be distributed and/or modified under the terms of the
+ * GNU General Public License (GPL) version 2 as published by the Free Software
+ * Foundation and appearing in the file LICENSE.GPL included in the
+ * packaging of this file.
+ *
+ * This library is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
+ * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Commercial use or any other use of this library not covered by either 
+ * the QPL or the GPL requires an additional license from Dtecta. 
+ * Please contact info@dtecta.com for enquiries about the terms of commercial
+ * use of this library.
+ */
+
+#ifndef MT_VECTOR3_H
+#define MT_VECTOR3_H
+
+#include "MT_Scalar.h"
+#include <MT/Vector3.h>
+
+typedef MT::Vector3<MT_Scalar> MT_Vector3;
+
+#ifdef CPU_CMP
+
+inline bool operator==(const MT_Vector3& p1, const MT_Vector3& p2) 
+{
+	const unsigned int *i1 = (const unsigned int *)&p1;
+	const unsigned int *i2 = (const unsigned int *)&p2;
+    return i1[0] == i2[0] && i1[1] == i2[1] && i1[2] == i2[2];
+}
+
+#else
+
+inline bool operator==(const MT_Vector3& p1, const MT_Vector3& p2) 
+{
+	return p1[0] == p2[0] && p1[1] == p2[1] && p1[2] == p2[2];
+}
+
+#endif
+
+#endif