/usr/include/vtk-5.8/vtkRungeKutta4.h is in libvtk5-dev 5.8.0-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 | /*=========================================================================
Program: Visualization Toolkit
Module: vtkRungeKutta4.h
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
// .NAME vtkRungeKutta4 - Integrate an initial value problem using 4th
// order Runge-Kutta method.
// .SECTION Description
// This is a concrete sub-class of vtkInitialValueProblemSolver.
// It uses a 4th order Runge-Kutta method to obtain the values of
// a set of functions at the next time step.
// .SECTION See Also
// vtkInitialValueProblemSolver vtkRungeKutta45 vtkRungeKutta2 vtkFunctionSet
#ifndef __vtkRungeKutta4_h
#define __vtkRungeKutta4_h
#include "vtkInitialValueProblemSolver.h"
class VTK_COMMON_EXPORT vtkRungeKutta4 : public vtkInitialValueProblemSolver
{
public:
vtkTypeMacro(vtkRungeKutta4,vtkInitialValueProblemSolver);
virtual void PrintSelf(ostream& os, vtkIndent indent);
// Description:
// Construct a vtkRungeKutta4 with no initial FunctionSet.
static vtkRungeKutta4 *New();
// Description:
// Given initial values, xprev , initial time, t and a requested time
// interval, delT calculate values of x at t+delT (xnext).
// delTActual is always equal to delT.
// Since this class can not provide an estimate for the error error
// is set to 0.
// maxStep, minStep and maxError are unused.
// This method returns an error code representing the nature of
// the failure:
// OutOfDomain = 1,
// NotInitialized = 2,
// UnexpectedValue = 3
virtual int ComputeNextStep(double* xprev, double* xnext, double t,
double& delT, double maxError, double& error)
{
double minStep = delT;
double maxStep = delT;
double delTActual;
return this->ComputeNextStep(xprev, 0, xnext, t, delT, delTActual,
minStep, maxStep, maxError, error);
}
virtual int ComputeNextStep(double* xprev, double* dxprev, double* xnext,
double t, double& delT,
double maxError, double& error)
{
double minStep = delT;
double maxStep = delT;
double delTActual;
return this->ComputeNextStep(xprev, dxprev, xnext, t, delT, delTActual,
minStep, maxStep, maxError, error);
}
virtual int ComputeNextStep(double* xprev, double* xnext,
double t, double& delT, double& delTActual,
double minStep, double maxStep,
double maxError, double& error)
{
return this->ComputeNextStep(xprev, 0, xnext, t, delT, delTActual,
minStep, maxStep, maxError, error);
}
virtual int ComputeNextStep(double* xprev, double* dxprev, double* xnext,
double t, double& delT, double& delTActual,
double minStep, double maxStep,
double maxError, double& error);
protected:
vtkRungeKutta4();
~vtkRungeKutta4();
virtual void Initialize();
double* NextDerivs[3];
private:
vtkRungeKutta4(const vtkRungeKutta4&); // Not implemented.
void operator=(const vtkRungeKutta4&); // Not implemented.
};
#endif
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