49 lines
1.4 KiB
C++
49 lines
1.4 KiB
C++
//====== Copyright © 1996-2004, 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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#ifndef DMEEXPRESSIONOPERATOR_H
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#define DMEEXPRESSIONOPERATOR_H
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#ifdef _WIN32
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#pragma once
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#endif
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#include "movieobjects/dmeoperator.h"
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#include "mathlib/expressioncalculator.h"
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//-----------------------------------------------------------------------------
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// An operator which computes the value of expressions
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//-----------------------------------------------------------------------------
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class CDmeExpressionOperator : public CDmeOperator
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{
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DEFINE_ELEMENT( CDmeExpressionOperator, CDmeOperator );
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public:
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virtual void Operate();
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virtual void GetInputAttributes ( CUtlVector< CDmAttribute * > &attrs );
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virtual void GetOutputAttributes( CUtlVector< CDmAttribute * > &attrs );
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void SetSpewResult( bool state );
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protected:
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bool Parse( const char *expr );
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bool IsInputAttribute( CDmAttribute *pAttribute );
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CExpressionCalculator m_calc;
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CDmaVar< float > m_result;
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CDmaString m_expr;
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CDmaVar< bool > m_bSpewResult;
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};
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#endif // DMEEXPRESSIONOPERATOR_H
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