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diff --git a/common/GameUI/Random.h b/common/GameUI/Random.h
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+++ b/common/GameUI/Random.h
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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: Generalized 32-bit random number generator
+//			Range is 0x00000000 - 0x7FFFFFFF
+//
+// $NoKeywords: $
+//=============================================================================//
+
+#ifndef RANDOM_H
+#define RANDOM_H
+#ifdef _WIN32
+#pragma once
+#endif
+
+// the random number seeding is automatic
+
+#define MAX_RANDOM_RANGE 0x7FFFFFFFUL
+
+// restarts random generator 
+// setting lSeed to 0 causes the current time to be used as the seed
+// random number generator will automatically seed itself on first use with current time if this is not called
+extern void SeedRandomNumberGenerator(long lSeed = 0);
+
+// returns a random integer of range [low, high]
+extern long RandomLong( long lLow, long lHigh );
+
+// returns a random float of range [low, high)
+extern float RandomFloat( float flLow, float flHigh );
+
+#endif // RANDOM_H