VTK  9.2.5
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 =========================================================================*/
61 #ifndef vtkRungeKutta4_h
62 #define vtkRungeKutta4_h
63 
64 #include "vtkCommonMathModule.h" // For export macro
66 
67 class VTKCOMMONMATH_EXPORT vtkRungeKutta4 : public vtkInitialValueProblemSolver
68 {
69 public:
71  void PrintSelf(ostream& os, vtkIndent indent) override;
72 
76  static vtkRungeKutta4* New();
77 
78  using Superclass::ComputeNextStep;
80 
93  int ComputeNextStep(double* xprev, double* xnext, double t, double& delT, double maxError,
94  double& error, void* userData) override
95  {
96  double minStep = delT;
97  double maxStep = delT;
98  double delTActual;
99  return this->ComputeNextStep(
100  xprev, nullptr, xnext, t, delT, delTActual, minStep, maxStep, maxError, error, userData);
101  }
102  int ComputeNextStep(double* xprev, double* dxprev, double* xnext, double t, double& delT,
103  double maxError, double& error, void* userData) override
104  {
105  double minStep = delT;
106  double maxStep = delT;
107  double delTActual;
108  return this->ComputeNextStep(
109  xprev, dxprev, xnext, t, delT, delTActual, minStep, maxStep, maxError, error, userData);
110  }
111  int ComputeNextStep(double* xprev, double* xnext, double t, double& delT, double& delTActual,
112  double minStep, double maxStep, double maxError, double& error, void* userData) override
113  {
114  return this->ComputeNextStep(
115  xprev, nullptr, xnext, t, delT, delTActual, minStep, maxStep, maxError, error, userData);
116  }
117  int ComputeNextStep(double* xprev, double* dxprev, double* xnext, double t, double& delT,
118  double& delTActual, double minStep, double maxStep, double maxError, double& error,
119  void* userData) override;
121 
122 protected:
124  ~vtkRungeKutta4() override;
125 
126  void Initialize() override;
127 
128  double* NextDerivs[3];
129 
130 private:
131  vtkRungeKutta4(const vtkRungeKutta4&) = delete;
132  void operator=(const vtkRungeKutta4&) = delete;
133 };
134 
135 #endif
a simple class to control print indentation
Definition: vtkIndent.h:119
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
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 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...
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
Given initial values, xprev , initial time, t and a requested time interval, delT calculate values of...