VTK  9.2.6
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 =========================================================================*/
32 #ifndef vtkRungeKutta4_h
33 #define vtkRungeKutta4_h
34 
35 #include "vtkCommonMathModule.h" // For export macro
37 
38 class VTKCOMMONMATH_EXPORT vtkRungeKutta4 : public vtkInitialValueProblemSolver
39 {
40 public:
42  void PrintSelf(ostream& os, vtkIndent indent) override;
43 
47  static vtkRungeKutta4* New();
48 
49  using Superclass::ComputeNextStep;
51 
64  int ComputeNextStep(double* xprev, double* xnext, double t, double& delT, double maxError,
65  double& error, void* userData) override
66  {
67  double minStep = delT;
68  double maxStep = delT;
69  double delTActual;
70  return this->ComputeNextStep(
71  xprev, nullptr, xnext, t, delT, delTActual, minStep, maxStep, maxError, error, userData);
72  }
73  int ComputeNextStep(double* xprev, double* dxprev, double* xnext, double t, double& delT,
74  double maxError, double& error, void* userData) override
75  {
76  double minStep = delT;
77  double maxStep = delT;
78  double delTActual;
79  return this->ComputeNextStep(
80  xprev, dxprev, xnext, t, delT, delTActual, minStep, maxStep, maxError, error, userData);
81  }
82  int ComputeNextStep(double* xprev, double* xnext, double t, double& delT, double& delTActual,
83  double minStep, double maxStep, double maxError, double& error, void* userData) override
84  {
85  return this->ComputeNextStep(
86  xprev, nullptr, xnext, t, delT, delTActual, minStep, maxStep, maxError, error, userData);
87  }
88  int ComputeNextStep(double* xprev, double* dxprev, double* xnext, double t, double& delT,
89  double& delTActual, double minStep, double maxStep, double maxError, double& error,
90  void* userData) override;
92 
93 protected:
95  ~vtkRungeKutta4() override;
96 
97  void Initialize() override;
98 
99  double* NextDerivs[3];
100 
101 private:
102  vtkRungeKutta4(const vtkRungeKutta4&) = delete;
103  void operator=(const vtkRungeKutta4&) = delete;
104 };
105 
106 #endif
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...
void PrintSelf(ostream &os, vtkIndent indent) override
Methods invoked by print to print information about the object including superclasses.
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
Given initial values, xprev , initial time, t and a requested time interval, delT calculate values of...
a simple class to control print indentation
Definition: vtkIndent.h:39
Integrate an initial value problem using 4th order Runge-Kutta method.
static vtkObject * New()
Create an object with Debug turned off, modified time initialized to zero, and reference counting on...
int ComputeNextStep(double *xprev, double *dxprev, 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...
Integrate a set of ordinary differential equations (initial value problem) in time.