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/***************************************************************************
* eval.h is part of Math Graphic Library
* Copyright (C) 2007-2016 Alexey Balakin <mathgl.abalakin@gmail.ru> *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU Lesser General Public License as *
* published by the Free Software Foundation; either version 3 of the *
* License, or (at your option) any later version. *
* *
* 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 Lesser 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 _MGL_EVAL_H_
#define _MGL_EVAL_H_
//-----------------------------------------------------------------------------
#include "mgl2/abstract.h"
/// types of errors
#define MGL_ERR_LOG 1
#define MGL_ERR_ARC 2
#define MGL_ERR_SQRT 3
class mglData;
//-----------------------------------------------------------------------------
/// Class for evaluating formula specified by the string
class MGL_EXPORT mglFormula
{
public:
/// Evaluates the formula for 'x','r'=\a x, 'y','n'=\a y, 'z','t'=\a z, 'u'=\a u
mreal Calc(mreal x,mreal y=0,mreal z=0,mreal u=0) const MGL_FUNC_PURE;
/// Evaluates the formula for 'x, y, z, u, v, w'
mreal Calc(mreal x,mreal y,mreal z,mreal u,mreal v,mreal w) const MGL_FUNC_PURE;
/// Evaluates the formula for variables var
mreal Calc(const mreal var[MGL_VS]) const MGL_FUNC_PURE;
/// Evaluates the formula for variables var
void CalcV(HMDT res, HCDT var[MGL_VS]) const;
/// Evaluates the formula for variables var (OpenMP-based)
void CalcVomp(HMDT res, HCDT var[MGL_VS]) const;
/// Evaluates the formula for 'x','r'=\a x, 'y','n'=\a y, 'z','t'=\a z, 'u'=\a u
mreal CalcD(char diff, mreal x,mreal y=0,mreal z=0,mreal u=0) const MGL_FUNC_PURE;
/// Evaluates the formula for 'x, y, z, u, v, w'
mreal CalcD(char diff, mreal x,mreal y,mreal z,mreal u,mreal v,mreal w) const MGL_FUNC_PURE;
/// Evaluates the derivates of the formula for variables var respect to variable diff
mreal CalcD(const mreal var[MGL_VS], char diff) const MGL_FUNC_PURE;
/// Return error code
inline int GetError() const { return Error; }
/// Parse the formula str and create formula-tree
mglFormula(const char *str);
/// Set data for the spline interpolation
mglFormula(HCDT d, mreal x1=0, mreal x2=1, mreal y1=0, mreal y2=1, mreal z1=0, mreal z2=1) :
dat(d),dx1(x1),dx2(x2),dy1(y1),dy2(y2),dz1(z1),dz2(z2),tmp(NULL) {};
/// Clean up formula-tree
~mglFormula();
protected:
mreal CalcIn(const mreal *a1) const MGL_FUNC_PURE;
mreal CalcDIn(int id, const mreal *a1) const MGL_FUNC_PURE;
mglFormula *Left,*Right; // first and second argument of the function
int Kod; // the function ID
mreal Res; // the number or the variable ID
HCDT dat; // data file for the interpolation
mreal dx1,dx2,dy1,dy2,dz1,dz2; // ranges of data files
static int Error;
private:
mglData *tmp;
};
//-----------------------------------------------------------------------------
#endif
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