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game/client/fx_interpvalue.h

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+//=============================================================================
+
+#ifndef FX_INTERPVALUE_H
+#define FX_INTERPVALUE_H
+#ifdef _WIN32
+#pragma once
+#endif
+
+// Types of supported interpolation
+enum InterpType_t
+{
+	INTERP_LINEAR = 0,
+	INTERP_SPLINE,
+};
+
+class CInterpolatedValue 
+{
+public:
+			CInterpolatedValue( void );
+			CInterpolatedValue( float startTime, float endTime, float startValue, float endValue, InterpType_t type );
+
+	void	SetTime( float start, float end );
+	void	SetRange( float start, float end );
+	void	SetType( InterpType_t type );
+	
+	// Set the value with no range
+	void SetAbsolute( float value );
+
+	// Set the value with range and time supplied
+	void Init( float startValue, float endValue, float dt, InterpType_t type = INTERP_LINEAR );
+
+	// Start from the current value and move towards the end value
+	void InitFromCurrent( float endValue, float dt, InterpType_t type = INTERP_LINEAR );
+
+	// Find our interpolated value at the given point in time
+	float Interp( float curTime );
+
+private:
+
+	float	m_flStartTime;
+	float	m_flEndTime;
+	float	m_flStartValue;
+	float	m_flEndValue;
+
+	int		m_nInterpType;
+};
+
+#endif // FX_INTERPVALUE_H