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Filtering/vtkSpline.h

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00001 /*=========================================================================
00002 
00003   Program:   Visualization Toolkit
00004   Module:    $RCSfile: vtkSpline.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 =========================================================================*/
00043 #ifndef __vtkSpline_h
00044 #define __vtkSpline_h
00045 
00046 #include "vtkObject.h"
00047 
00048 class vtkPiecewiseFunction;
00049 
00050 class VTK_FILTERING_EXPORT vtkSpline : public vtkObject
00051 {
00052 public:
00053   vtkTypeRevisionMacro(vtkSpline,vtkObject);
00054   void PrintSelf(ostream& os, vtkIndent indent);
00055 
00056 #ifndef VTK_REMOVE_LEGACY_CODE
00057 
00058   virtual vtkSpline* MakeObject();
00059 #endif
00060 
00062 
00064   vtkSetMacro(ClampValue,int);
00065   vtkGetMacro(ClampValue,int);
00066   vtkBooleanMacro(ClampValue,int);
00068 
00070   virtual void Compute () = 0;
00071 
00073   virtual float Evaluate (float t) = 0;
00074 
00076   void AddPoint (float t, float x);
00077 
00079   void RemovePoint (float t);
00080  
00082   void RemoveAllPoints ();
00083 
00085 
00088   vtkSetMacro(Closed,int);
00089   vtkGetMacro(Closed,int);
00090   vtkBooleanMacro(Closed,int);
00092 
00094 
00102   vtkSetClampMacro(LeftConstraint,int,0,3);
00103   vtkGetMacro(LeftConstraint,int);
00104   vtkSetClampMacro(RightConstraint,int,0,3);
00105   vtkGetMacro(RightConstraint,int);
00107 
00109 
00111   vtkSetMacro(LeftValue,float);
00112   vtkGetMacro(LeftValue,float);
00113   vtkSetMacro(RightValue,float);
00114   vtkGetMacro(RightValue,float);
00116 
00118   unsigned long GetMTime();
00119 
00121   virtual void DeepCopy(vtkSpline *s);
00122 
00123 protected:
00124   vtkSpline();
00125   ~vtkSpline ();
00126 
00127   unsigned long ComputeTime;
00128   int ClampValue;
00129   float *Intervals;
00130   float *Coefficients;
00131   int LeftConstraint;
00132   float LeftValue;
00133   int RightConstraint;
00134   float RightValue;
00135   vtkPiecewiseFunction *PiecewiseFunction;
00136   int Closed;
00137 
00138   // Helper methods
00139   float ComputeLeftDerivative();
00140   float ComputeRightDerivative();
00141 
00142 private:
00143   vtkSpline(const vtkSpline&);  // Not implemented.
00144   void operator=(const vtkSpline&);  // Not implemented.
00145 };
00146 
00147 #endif
00148