106 lines
3.4 KiB
C++
106 lines
3.4 KiB
C++
//========= Copyright Valve Corporation, All rights reserved. ============//
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//
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// The expression operator class - scalar math calculator
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// for a good list of operators and simple functions, see:
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// \\fileserver\user\MarcS\boxweb\aliveDistLite\v4.2.0\doc\alive\functions.txt
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// (although we'll want to implement elerp as the standard 3x^2 - 2x^3 with rescale)
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//
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//=============================================================================
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#include "movieobjects/dmebalancetostereocalculatoroperator.h"
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#include "movieobjects/dmechannel.h"
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#include "movieobjects_interfaces.h"
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#include "datamodel/dmelementfactoryhelper.h"
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#include "datamodel/dmattribute.h"
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// memdbgon must be the last include file in a .cpp file!!!
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#include "tier0/memdbgon.h"
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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( DmeBalanceToStereoCalculatorOperator, CDmeBalanceToStereoCalculatorOperator );
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//-----------------------------------------------------------------------------
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// Purpose:
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//-----------------------------------------------------------------------------
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void CDmeBalanceToStereoCalculatorOperator::OnConstruction()
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{
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m_result_left.Init( this, "result_left" );
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m_result_right.Init( this, "result_right" );
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m_result_multi.Init( this, "result_multi" );
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m_value.Init( this, "value" );
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m_balance.InitAndSet( this, "balance", 0.5f );
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m_multilevel.InitAndSet( this, "multilevel", 0.5f );
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m_bSpewResult.Init( this, "spewresult" );
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m_flDefaultValue = FLT_MAX;
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}
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void CDmeBalanceToStereoCalculatorOperator::OnDestruction()
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{
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}
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void CDmeBalanceToStereoCalculatorOperator::GetInputAttributes ( CUtlVector< CDmAttribute * > &attrs )
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{
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attrs.AddToTail( m_value.GetAttribute() );
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attrs.AddToTail( m_balance.GetAttribute() );
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attrs.AddToTail( m_multilevel.GetAttribute() );
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}
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void CDmeBalanceToStereoCalculatorOperator::GetOutputAttributes( CUtlVector< CDmAttribute * > &attrs )
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{
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attrs.AddToTail( m_result_left.GetAttribute() );
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attrs.AddToTail( m_result_right.GetAttribute() );
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attrs.AddToTail( m_result_multi.GetAttribute() );
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}
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float CDmeBalanceToStereoCalculatorOperator::ComputeDefaultValue()
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{
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// NOTE: This is a total hack, which we expect to remove soon, when the balance work is done.
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const static UtlSymId_t symToElement = g_pDataModel->GetSymbol( "toElement" );
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CDmeChannel *pChannel = FindReferringElement<CDmeChannel>( this, symToElement );
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if ( !pChannel )
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return 0.0f;
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CDmElement *pControl = pChannel->GetFromElement();
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if ( !pControl )
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return 0.0f;
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return pControl->GetValue<float>( "defaultValue" );
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}
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void CDmeBalanceToStereoCalculatorOperator::Operate()
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{
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if ( m_flDefaultValue == FLT_MAX )
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{
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m_flDefaultValue = ComputeDefaultValue();
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}
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float flValue = m_value - m_flDefaultValue;
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if ( m_balance > 0.5f )
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{
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m_result_right = m_value;
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m_result_left = ( ( 1.0f - m_balance ) / 0.5f ) * flValue + m_flDefaultValue;
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}
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else
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{
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m_result_right = ( m_balance / 0.5f ) * flValue + m_flDefaultValue;
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m_result_left = m_value;
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}
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m_result_multi = m_multilevel;
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if ( m_bSpewResult )
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{
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Msg( "%s = l('%f') r('%f') m('%f')\n", GetName(), (float)m_result_left, (float)m_result_right, (float)m_result_multi );
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}
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}
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void CDmeBalanceToStereoCalculatorOperator::SetSpewResult( bool state )
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{
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m_bSpewResult = state;
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}
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