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diff --git a/dep/g3dlite/G3D/G3DGameUnits.h b/dep/g3dlite/G3D/G3DGameUnits.h
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+/**
+ @file G3DGameUnits.h
+
+ @maintainer Morgan McGuire, http://graphics.cs.williams.edu
+ @created 2002-10-05
+ @edited  2006-11-10
+ */
+
+#ifndef G3D_GAMEUNITS_H
+#define G3D_GAMEUNITS_H
+
+#include "G3D/platform.h"
+
+namespace G3D {
+/**
+ Time, in seconds.
+ */
+typedef double GameTime;
+typedef double SimTime;
+
+/**
+ Actual wall clock time in seconds.
+ */
+typedef double RealTime;
+
+enum AMPM {AM, PM};
+
+/** \deprecated */
+enum {SECOND=1, MINUTE=60, HOUR = 60*60, DAY=24*60*60, SUNRISE=24*60*60/4, SUNSET=24*60*60*3/4, MIDNIGHT=0, METER=1, KILOMETER=1000};
+
+/**
+ Converts a 12 hour clock time into the number of seconds since 
+ midnight.  Note that 12:00 PM is noon and 12:00 AM is midnight.
+
+ Example: <CODE>toSeconds(10, 00, AM)</CODE>
+ */
+SimTime toSeconds(int hour, int minute, double seconds, AMPM ap);
+SimTime toSeconds(int hour, int minute, AMPM ap);
+
+}
+
+#endif