ScalarFunctionsImpl.h

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/* $Header: /var/cvs/mbdyn/mbdyn/mbdyn-1.0/mbdyn/base/ScalarFunctionsImpl.h,v 1.26 2017/01/12 14:46:08 masarati Exp $ */
/* 
 * HmFe (C) is a FEM analysis code. 
 *
 * Copyright (C) 1996-2017
 *
 * Marco Morandini  <morandini@aero.polimi.it>
 *
 * Dipartimento di Ingegneria Aerospaziale - Politecnico di Milano
 * via La Masa, 34 - 20156 Milano, Italy
 * http://www.aero.polimi.it
 *
 * Changing this copyright notice is forbidden.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 *
 */
/*
 * MBDyn (C) is a multibody analysis code. 
 * http://www.mbdyn.org
 *
 * Copyright (C) 1996-2017
 * 
 * This code is a partial merge of HmFe and MBDyn.
 *
 * Pierangelo Masarati  <masarati@aero.polimi.it>
 * Paolo Mantegazza     <mantegazza@aero.polimi.it>
 *
 * Dipartimento di Ingegneria Aerospaziale - Politecnico di Milano
 * via La Masa, 34 - 20156 Milano, Italy
 * http://www.aero.polimi.it
 *
 * Changing this copyright notice is forbidden.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation (version 2 of the License).
 * 
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
#ifndef ScalarFunctionsImpl_hh
#define ScalarFunctionsImpl_hh

#include <vector>

#include "ScalarFunctions.h"

class ConstScalarFunction : public DifferentiableScalarFunction {
private:
        const doublereal y;
public:
        ConstScalarFunction(const doublereal v);
        virtual ~ConstScalarFunction(void);
        virtual doublereal operator()(const doublereal x) const;
        virtual doublereal ComputeDiff(const doublereal t, const integer order = 1) const;
};

class LinearScalarFunction : public DifferentiableScalarFunction {
private:
        doublereal m;
        doublereal y0;
public:
        LinearScalarFunction(
                const doublereal t_i,
                const doublereal y_i,
                const doublereal t_f,
                const doublereal y_f);
        virtual ~LinearScalarFunction(void);
        virtual doublereal operator()(const doublereal x) const;
        virtual doublereal ComputeDiff(const doublereal t, const integer order = 1) const;
};

class PowScalarFunction : public DifferentiableScalarFunction {
private:
        const doublereal pw;
public:
        PowScalarFunction(const doublereal p);
        virtual ~PowScalarFunction(void);
        virtual doublereal operator()(const doublereal x) const;
        virtual doublereal ComputeDiff(const doublereal t, const integer order = 1) const;
};

class LogScalarFunction : public DifferentiableScalarFunction {
private:
        const doublereal mul_input;
        doublereal mul_const;
        const doublereal base;
        const doublereal coef;

public:
        LogScalarFunction(const doublereal& ml, const doublereal& b, const doublereal& c);
        virtual ~LogScalarFunction(void);
        virtual doublereal operator()(const doublereal x) const;
        virtual doublereal ComputeDiff(const doublereal t, const integer order = 1) const;
};

class ExpScalarFunction : public DifferentiableScalarFunction {
private:
        const doublereal mul;
        const doublereal base;
        const doublereal coef_input;
        doublereal coef_const;

public:
        ExpScalarFunction(const doublereal& ml, const doublereal& b, const doublereal& c);
        virtual ~ExpScalarFunction(void);
        virtual doublereal operator()(const doublereal x) const;
        virtual doublereal ComputeDiff(const doublereal t, const integer order = 1) const;
};

class CubicSplineScalarFunction : public DifferentiableScalarFunction {
private:
        std::vector<doublereal> Y_i;
        std::vector<doublereal> X_i;
        std::vector<doublereal> b, c, d;
        bool doNotExtrapolate;
public:
        CubicSplineScalarFunction(
                const std::vector<doublereal>& y_i,
                const std::vector<doublereal>& x_i,
                bool doNotExtrapolate = false);
        virtual ~CubicSplineScalarFunction(void);
        virtual doublereal operator()(const doublereal x) const;
        virtual doublereal ComputeDiff(const doublereal t, const integer order = 1) const;
};

class MultiLinearScalarFunction : public DifferentiableScalarFunction {
private:
        std::vector<doublereal> Y_i;
        std::vector<doublereal> X_i;
        bool doNotExtrapolate;
public:
        MultiLinearScalarFunction(
                const std::vector<doublereal>& y_i,
                const std::vector<doublereal>& x_i,
                bool doNotExtrapolate = false);
        virtual ~MultiLinearScalarFunction(void);
        virtual doublereal operator()(const doublereal x) const;
        virtual doublereal ComputeDiff(const doublereal t, const integer order = 1) const;
};

class ChebychevScalarFunction : public DifferentiableScalarFunction {
private:
        std::vector<doublereal> vCoef;
        const doublereal da, dfa, dfap, db, dfb, dfbp;
        bool doNotExtrapolate;
public:
        ChebychevScalarFunction(const std::vector<doublereal>& v,
                const doublereal& a, const doublereal& b,
                bool doNotExtrapolate = false);
        virtual ~ChebychevScalarFunction(void);
        virtual doublereal operator()(const doublereal x) const;
        virtual doublereal ComputeDiff(const doublereal t, const integer order = 1) const;
};

class SumScalarFunction : public DifferentiableScalarFunction {
private:
        const DifferentiableScalarFunction *const a1;
        const DifferentiableScalarFunction *const a2;
public:
        SumScalarFunction(
                const BasicScalarFunction *const b1,
                const BasicScalarFunction *const b2
        );
        virtual ~SumScalarFunction(void);
        virtual doublereal operator()(const doublereal x) const;
        virtual doublereal ComputeDiff(const doublereal t, const integer order = 1) const;
};

class SubScalarFunction : public DifferentiableScalarFunction {
private:
        const DifferentiableScalarFunction *const a1;
        const DifferentiableScalarFunction *const a2;
public:
        SubScalarFunction(
                const BasicScalarFunction *const b1,
                const BasicScalarFunction *const b2
        );
        virtual ~SubScalarFunction(void);
        virtual doublereal operator()(const doublereal x) const;
        virtual doublereal ComputeDiff(const doublereal t, const integer order = 1) const;
};

class MulScalarFunction : public DifferentiableScalarFunction {
private:
        const DifferentiableScalarFunction *const a1;
        const DifferentiableScalarFunction *const a2;
public:
        MulScalarFunction(
                const BasicScalarFunction *const b1,
                const BasicScalarFunction *const b2
        );
        virtual ~MulScalarFunction(void);
        virtual doublereal operator()(const doublereal x) const;
        virtual doublereal ComputeDiff(const doublereal t, const integer order = 1) const;
};

class DivScalarFunction : public DifferentiableScalarFunction {
private:
        const DifferentiableScalarFunction *const a1;
        const DifferentiableScalarFunction *const a2;
public:
        DivScalarFunction(
                const BasicScalarFunction *const b1,
                const BasicScalarFunction *const b2
        );
        virtual ~DivScalarFunction(void);
        virtual doublereal operator()(const doublereal x) const;
        virtual doublereal ComputeDiff(const doublereal t, const integer order = 1) const;
};

#endif /* ScalarFunctionsImpl_hh */