94 lines
2.4 KiB
C++
94 lines
2.4 KiB
C++
//========= Copyright Valve Corporation, All rights reserved. ============//
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//
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// Purpose:
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//
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//=============================================================================
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#include "cbase.h"
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#include "fx_interpvalue.h"
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CInterpolatedValue::CInterpolatedValue( void ) : m_flStartTime( 0.0f ), m_flEndTime( 0.0f ), m_flStartValue( 0.0f ), m_flEndValue( 0.0f ), m_nInterpType( INTERP_LINEAR )
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{
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}
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CInterpolatedValue::CInterpolatedValue( float startTime, float endTime, float startValue, float endValue, InterpType_t type ) :
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m_flStartTime( startTime ), m_flEndTime( endTime ), m_flStartValue( startValue ), m_flEndValue( endValue ), m_nInterpType( type )
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{
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}
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void CInterpolatedValue::SetTime( float start, float end )
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{
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m_flStartTime = start; m_flEndTime = end;
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}
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void CInterpolatedValue::SetRange( float start, float end )
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{
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m_flStartValue = start; m_flEndValue = end;
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}
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void CInterpolatedValue::SetType( InterpType_t type )
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{
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m_nInterpType = type;
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}
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// Set the value with no range
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void CInterpolatedValue::SetAbsolute( float value )
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{
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m_flStartValue = m_flEndValue = value;
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m_flStartTime = m_flEndTime = gpGlobals->curtime;
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m_nInterpType = INTERP_LINEAR;
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}
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// Set the value with range and time supplied
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void CInterpolatedValue::Init( float startValue, float endValue, float dt, InterpType_t type /*= INTERP_LINEAR*/ )
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{
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if ( dt <= 0.0f )
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{
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SetAbsolute( endValue );
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return;
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}
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SetTime( gpGlobals->curtime, gpGlobals->curtime + dt );
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SetRange( startValue, endValue );
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SetType( type );
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}
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// Start from the current value and move towards the end value
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void CInterpolatedValue::InitFromCurrent( float endValue, float dt, InterpType_t type /*= INTERP_LINEAR*/ )
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{
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Init( Interp( gpGlobals->curtime ), endValue, dt, type );
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}
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// Find our interpolated value at the given point in time
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float CInterpolatedValue::Interp( float curTime )
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{
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switch( m_nInterpType )
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{
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case INTERP_LINEAR:
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{
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if ( curTime >= m_flEndTime )
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return m_flEndValue;
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if ( curTime <= m_flStartTime )
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return m_flStartValue;
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return RemapVal( curTime, m_flStartTime, m_flEndTime, m_flStartValue, m_flEndValue );
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}
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case INTERP_SPLINE:
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{
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if ( curTime >= m_flEndTime )
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return m_flEndValue;
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if ( curTime <= m_flStartTime )
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return m_flStartValue;
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return SimpleSplineRemapVal( curTime, m_flStartTime, m_flEndTime, m_flStartValue, m_flEndValue );
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}
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}
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// NOTENOTE: You managed to pass in a bogus interpolation type!
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Assert(0);
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return -1.0f;
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}
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