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diff --git a/thirdparty/rvo2/src/Definitions.h b/thirdparty/rvo2/src/Definitions.h
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+/*
+ * Definitions.h
+ * RVO2-3D Library
+ *
+ * Copyright 2008 University of North Carolina at Chapel Hill
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * Please send all bug reports to <geom@cs.unc.edu>.
+ *
+ * The authors may be contacted via:
+ *
+ * Jur van den Berg, Stephen J. Guy, Jamie Snape, Ming C. Lin, Dinesh Manocha
+ * Dept. of Computer Science
+ * 201 S. Columbia St.
+ * Frederick P. Brooks, Jr. Computer Science Bldg.
+ * Chapel Hill, N.C. 27599-3175
+ * United States of America
+ *
+ * <http://gamma.cs.unc.edu/RVO2/>
+ */
+
+/**
+ * \file   Definitions.h
+ * \brief  Contains functions and constants used in multiple classes.
+ */
+
+#ifndef RVO_DEFINITIONS_H_
+#define RVO_DEFINITIONS_H_
+
+#include "API.h"
+
+namespace RVO {
+	/**
+	 * \brief   Computes the square of a float.
+	 * \param   scalar  The float to be squared.
+	 * \return  The square of the float.
+	 */
+	inline float sqr(float scalar)
+	{
+		return scalar * scalar;
+	}
+}
+
+#endif /* RVO_DEFINITIONS_H_ */