initial

game/client/timedevent.h

@@ -0,0 +1,65 @@
+//========= Copyright <20> 1996-2005, Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+//=============================================================================//
+
+#ifndef TIMEDEVENT_H
+#define TIMEDEVENT_H
+#ifdef _WIN32
+#pragma once
+#endif
+
+// This class triggers events at a specified rate. Just call NextEvent() and do an event until it 
+// returns false. For example, if you want to spawn particles 10 times per second, do this:
+// pTimer->SetRate(10);
+// float tempDelta = fTimeDelta;
+// while(pTimer->NextEvent(tempDelta))
+//		spawn a particle
+
+class TimedEvent
+{
+public:
+				TimedEvent()
+				{
+					m_TimeBetweenEvents = -1;
+					m_fNextEvent = 0;
+				}
+
+	// Rate is in events per second (ie: rate of 15 will trigger 15 events per second).
+	inline void	Init(float rate)			
+	{
+		m_TimeBetweenEvents = 1.0f / rate;
+		m_fNextEvent = 0;
+	}
+	
+	inline void ResetRate(float rate)
+	{
+		m_TimeBetweenEvents = 1.0f / rate;
+	}
+
+	inline bool NextEvent(float &curDelta)
+	{
+		// If this goes off, you didn't call Init().
+		Assert( m_TimeBetweenEvents != -1 );
+
+		if(curDelta >= m_fNextEvent)
+		{
+			curDelta -= m_fNextEvent;
+			
+			m_fNextEvent = m_TimeBetweenEvents;
+			return true;
+		}
+		else
+		{
+			m_fNextEvent -= curDelta;
+			return false;
+		}
+	}
+
+private:
+	float		m_TimeBetweenEvents;
+	float		m_fNextEvent;	// When the next event should be triggered.
+};
+
+#endif // TIMEDEVENT_H