Last change
on this file since 3929 was 552, checked in by ansari, 26 years ago |
namespace changed to SOPHYA cmv 5/11/99
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File size:
1.2 KB
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1 | // This may look like C code, but it is really -*- C++ -*-
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2 | #ifndef RK4CDIFEQ_H_SEEN
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3 | #define RK4CDIFEQ_H_SEEN
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4 |
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5 | #include "difeq.h"
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6 |
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7 | namespace SOPHYA {
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8 |
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9 | // <summary> Runge-Kutta ordre 4 adaptatif </summary>
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10 | // Runge-Kutta ordre 4 adaptatif, avec correction du pas d'integration
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11 | class RK4CDiffEq : public RK4DiffEq {
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12 | public:
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13 | // Constructeurs. Voir <linkto class=DiffEqSolver>DiffEqSolver</linkto>
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14 | // <group>
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15 | RK4CDiffEq();
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16 | RK4CDiffEq(DiffEqFunction*);
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17 | RK4CDiffEq(DIFEQFCN1);
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18 | // </group>
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19 |
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20 | // Precision souhaitee, en absolu ou relatif, independamment pour chaque
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21 | // fonction ou globalement
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22 | // <group>
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23 | RK4CDiffEq& Accuracy(double);
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24 | RK4CDiffEq& AbsAccuracy(Vector const& vScal);
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25 | RK4CDiffEq& AbsAccuracy(double scal);
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26 | RK4CDiffEq& RelAccuracy();
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27 | // </group>
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28 |
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29 | // Implementation RK4 adaptatif
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30 | virtual void SolveArr(Matrix& y, double* t, double tf, int n);
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31 |
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32 | protected:
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33 | // Un pas adaptatif
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34 | void RKCStep(Vector& newY, Vector const& y0, Vector const& yScale,
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35 | double dttry, double& dtdone, double& dtnext);
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36 |
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37 | double eps;
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38 | bool relAccuracy;
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39 | Vector accScale;
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40 | Vector yTemp; // Pour ne pas reallouer
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41 | Vector ySave;
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42 | };
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43 |
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44 | } // Fin du namespace
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45 |
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46 | #endif
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