ODEVarStepIntegrator.hpp

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#pragma once
 
#include "AstGlobal.h"
#include "ODEFixedStepIntegrator.hpp"
 
 
AST_NAMESPACE_BEGIN
 
class AST_MATH_API ODEVarStepIntegrator : public ODEFixedStepIntegrator
{
public:
    ODEVarStepIntegrator();
    ~ODEVarStepIntegrator();
    using ODEFixedStepIntegrator::integrate;
 
    errc_t integrate(ODE& ode, double* y, double& t, double tf) final;
 
    errc_t integrateStep(ODE& ode, double* y, double& t, double tf) final;
 
    void setMaxAbsErr(double maxAbsErr){maxAbsErr_ = maxAbsErr;};
    void setMaxRelErr(double maxRelErr){maxRelErr_ = maxRelErr;};
 
    void setInitialStepSize(double initialStepSize){setStepSize(initialStepSize);};
 
    double getLargestStepSize() const;
 
    double getSmallestStepSize() const;
 
    using ODEFixedStepIntegrator::getNumSteps;
protected:
    bool isErrorMeet(double& absh, const double* y, const double* ynew);
private:
    bool useMinStep_;           
    bool useMaxStep_;           
    // bool useFixedStepSize_;     ///< 是否使用固定步长
    bool warnOnMinStep_;        
    int  maxStepAttempts_;      
    double minStepSize_;        
    double maxStepSize_;        
    double maxAbsErr_;          
    double maxRelErr_;          
    double minStepScaleFactor_; 
    double maxStepScaleFactor_; 
    double safetyCoeffLow_;     
    double safetyCoeffHigh_;    
    double errCtrPowthLow_;     
    double errCtrPowthHigh_;    
};
 
AST_NAMESPACE_END