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Common/vtkRungeKutta4.h

00001 /*=========================================================================
00002 
00003   Program:   Visualization Toolkit
00004   Module:    $RCSfile: vtkRungeKutta4.h,v $
00005   Language:  C++
00006 
00007   Copyright (c) 1993-2002 Ken Martin, Will Schroeder, Bill Lorensen 
00008   All rights reserved.
00009   See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
00010 
00011      This software is distributed WITHOUT ANY WARRANTY; without even 
00012      the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
00013      PURPOSE.  See the above copyright notice for more information.
00014 
00015 =========================================================================*/
00049 #ifndef __vtkRungeKutta4_h
00050 #define __vtkRungeKutta4_h
00051 
00052 #include "vtkInitialValueProblemSolver.h"
00053 
00054 class VTK_COMMON_EXPORT vtkRungeKutta4 : public vtkInitialValueProblemSolver
00055 {
00056 public:
00057   vtkTypeRevisionMacro(vtkRungeKutta4,vtkInitialValueProblemSolver);
00058   virtual void PrintSelf(ostream& os, vtkIndent indent);
00059 
00061   static vtkRungeKutta4 *New();
00062 
00063 
00065 
00071   virtual int ComputeNextStep(float* xprev, float* xnext, float t,
00072                               float& delT, float maxError, float& error) 
00073     {
00074       float minStep = delT;
00075       float maxStep = delT;
00076       float delTActual;
00077       return this->ComputeNextStep(xprev, 0, xnext, t, delT, delTActual,
00078                                    minStep, maxStep, maxError, error);
00079     }
00080   virtual int ComputeNextStep(float* xprev, float* dxprev, float* xnext, 
00081                               float t, float& delT, 
00082                               float maxError, float& error)
00083     {
00084       float minStep = delT;
00085       float maxStep = delT;
00086       float delTActual;
00087       return this->ComputeNextStep(xprev, dxprev, xnext, t, delT, delTActual,
00088                                    minStep, maxStep, maxError, error);
00089     }
00090   virtual int ComputeNextStep(float* xprev, float* xnext, 
00091                               float t, float& delT, float& delTActual,
00092                               float minStep, float maxStep,
00093                               float maxError, float& error)
00094     {
00095       return this->ComputeNextStep(xprev, 0, xnext, t, delT, delTActual,
00096                                    minStep, maxStep, maxError, error);
00097     }
00098   virtual int ComputeNextStep(float* xprev, float* dxprev, float* xnext, 
00099                               float t, float& delT, float& delTActual,
00100                               float minStep, float maxStep, 
00101                               float maxError, float& error);
00103 
00104 protected:
00105   vtkRungeKutta4();
00106   ~vtkRungeKutta4();
00107 
00108   virtual void Initialize();
00109 
00110   float* NextDerivs[3];
00111 private:
00112   vtkRungeKutta4(const vtkRungeKutta4&);  // Not implemented.
00113   void operator=(const vtkRungeKutta4&);  // Not implemented.
00114 };
00115 
00116 #endif
00117 
00118 
00119 
00120 
00121 
00122 
00123 
00124