VTK  9.0.3
vtkRungeKutta4.h
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1 /*=========================================================================
2 
3  Program: Visualization Toolkit
4  Module: vtkRungeKutta4.h
5 
6  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
7  All rights reserved.
8  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
9 
10  This software is distributed WITHOUT ANY WARRANTY; without even
11  the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
12  PURPOSE. See the above copyright notice for more information.
13 
14 =========================================================================*/
29 #ifndef vtkRungeKutta4_h
30 #define vtkRungeKutta4_h
31 
32 #include "vtkCommonMathModule.h" // For export macro
34 
35 class VTKCOMMONMATH_EXPORT vtkRungeKutta4 : public vtkInitialValueProblemSolver
36 {
37 public:
39  void PrintSelf(ostream& os, vtkIndent indent) override;
40 
44  static vtkRungeKutta4* New();
45 
46  using Superclass::ComputeNextStep;
48 
61  int ComputeNextStep(double* xprev, double* xnext, double t, double& delT, double maxError,
62  double& error, void* userData) override
63  {
64  double minStep = delT;
65  double maxStep = delT;
66  double delTActual;
67  return this->ComputeNextStep(
68  xprev, nullptr, xnext, t, delT, delTActual, minStep, maxStep, maxError, error, userData);
69  }
70  int ComputeNextStep(double* xprev, double* dxprev, double* xnext, double t, double& delT,
71  double maxError, double& error, void* userData) override
72  {
73  double minStep = delT;
74  double maxStep = delT;
75  double delTActual;
76  return this->ComputeNextStep(
77  xprev, dxprev, xnext, t, delT, delTActual, minStep, maxStep, maxError, error, userData);
78  }
79  int ComputeNextStep(double* xprev, double* xnext, double t, double& delT, double& delTActual,
80  double minStep, double maxStep, double maxError, double& error, void* userData) override
81  {
82  return this->ComputeNextStep(
83  xprev, nullptr, xnext, t, delT, delTActual, minStep, maxStep, maxError, error, userData);
84  }
85  int ComputeNextStep(double* xprev, double* dxprev, double* xnext, double t, double& delT,
86  double& delTActual, double minStep, double maxStep, double maxError, double& error,
87  void* userData) override;
89 
90 protected:
92  ~vtkRungeKutta4() override;
93 
94  void Initialize() override;
95 
96  double* NextDerivs[3];
97 
98 private:
99  vtkRungeKutta4(const vtkRungeKutta4&) = delete;
100  void operator=(const vtkRungeKutta4&) = delete;
101 };
102 
103 #endif
a simple class to control print indentation
Definition: vtkIndent.h:34
Integrate a set of ordinary differential equations (initial value problem) in time.
virtual int ComputeNextStep(double *xprev, double *xnext, double t, double &delT, double maxError, double &error)
Given initial values, xprev , initial time, t and a requested time interval, delT calculate values of...
Integrate an initial value problem using 4th order Runge-Kutta method.
void Initialize() override
~vtkRungeKutta4() override
int ComputeNextStep(double *xprev, double *dxprev, double *xnext, double t, double &delT, double &delTActual, double minStep, double maxStep, double maxError, double &error, void *userData) override
int ComputeNextStep(double *xprev, double *xnext, double t, double &delT, double maxError, double &error, void *userData) override
Given initial values, xprev , initial time, t and a requested time interval, delT calculate values of...
int ComputeNextStep(double *xprev, double *xnext, double t, double &delT, double &delTActual, double minStep, double maxStep, double maxError, double &error, void *userData) override
void PrintSelf(ostream &os, vtkIndent indent) override
Methods invoked by print to print information about the object including superclasses.
static vtkRungeKutta4 * New()
Construct a vtkRungeKutta4 with no initial FunctionSet.
int ComputeNextStep(double *xprev, double *dxprev, double *xnext, double t, double &delT, double maxError, double &error, void *userData) override