96 lines
2.9 KiB
C++
96 lines
2.9 KiB
C++
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//====== Copyright <20> 1996-2004, Valve Corporation, All rights reserved. =======
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//
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// A class representing a procedural texture
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//
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//=============================================================================
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#include "movieobjects/dmecycle.h"
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#include "datamodel/dmelementfactoryhelper.h"
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#include "tier0/dbg.h"
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#include "mathlib/mathlib.h"
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#include <math.h>
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//-----------------------------------------------------------------------------
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// Consts
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//-----------------------------------------------------------------------------
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#define INT_FLOAT_SCALE 0.000001f
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//#define USE_NEW_WAY
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//-----------------------------------------------------------------------------
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// Expose this class to the scene database
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//-----------------------------------------------------------------------------
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IMPLEMENT_ELEMENT_FACTORY( DmeCycle, CDmeCycle );
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//-----------------------------------------------------------------------------
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// Implementation
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//-----------------------------------------------------------------------------
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void CDmeCycle::OnConstruction()
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{
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m_cycleRate.Init( this, "cycleRate" );
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m_prevCycle.Init( this, "prevCycle" );
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m_lastCycleResetTime.Init( this, "lastCycleResetTime" );
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m_lastCycleResetValue.Init( this, "lastCycleResetValue" );
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}
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void CDmeCycle::OnDestruction()
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{
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}
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void CDmeCycle::SetCycleRate( float flCycleRate )
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{
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m_cycleRate = flCycleRate;
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}
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void CDmeCycle::SetPrevCycle( float flPrevCycle )
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{
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m_prevCycle = (int)(flPrevCycle / INT_FLOAT_SCALE);
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}
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void CDmeCycle::SetCycle( float flCycle, float flCurTime )
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{
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#ifdef USE_NEW_WAY
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float const flCycleDelta = fabs( flCycle - GetPrevCycle() );
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// NOTE: Overlays depend on this logic - record if cycle==0. There may be a better way to
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// do this, but if an overlay is at 0 while it's dormant (ie its weight==0), we need to
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// record at the moment its weight>0.
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bool bForceCycleRecord = flCycle == 0.0f;
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if ( bForceCycleRecord || flCycleDelta >= 0.1f )
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{
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// Store this time
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m_lastCycleResetTime = (int)(flCurTime / INT_FLOAT_SCALE);
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// For this method, m_cycle is only recorded when a reset of some kind has occurred
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m_lastCycleResetValue = (int)(flCycle / INT_FLOAT_SCALE);
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DevMsg(" resetting cycle at: time=%f cycle=%f\n", flCurTime, flCycle );
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}
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#else
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m_lastCycleResetValue = (int)(flCycle / INT_FLOAT_SCALE);
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#endif
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// Store as previous cycle
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SetPrevCycle( flCycle );
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}
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float CDmeCycle::GetCycleRate() const
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{
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return m_cycleRate;
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}
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float CDmeCycle::GetPrevCycle() const
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{
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return m_prevCycle * INT_FLOAT_SCALE;
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}
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float CDmeCycle::GetCycle( float flCurTime ) const
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{
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#ifdef USE_NEW_WAY
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float const dt = flCurTime - INT_FLOAT_SCALE * m_lastCycleResetTime;
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float const flCycle = INT_FLOAT_SCALE * m_lastCycleResetValue + GetCycleRate() * dt; Assert( flCycle >= 0.0f && flCycle <= 2.0f );
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return fmod( flCycle, 1.0f ); // In case it's 1.0f
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#else
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return INT_FLOAT_SCALE * m_lastCycleResetValue;
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#endif
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}
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