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Filtering/vtkSpline.h

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 =========================================================================*/
00055 #ifndef __vtkSpline_h
00056 #define __vtkSpline_h
00057 
00058 #include "vtkObject.h"
00059 
00060 class vtkPiecewiseFunction;
00061 
00062 class VTK_FILTERING_EXPORT vtkSpline : public vtkObject
00063 {
00064 public:
00065   vtkTypeRevisionMacro(vtkSpline,vtkObject);
00066   void PrintSelf(ostream& os, vtkIndent indent);
00067 
00068 #ifndef VTK_REMOVE_LEGACY_CODE
00069 
00070   virtual vtkSpline* MakeObject();
00071 #endif
00072 
00074 
00076   vtkSetMacro(ClampValue,int);
00077   vtkGetMacro(ClampValue,int);
00078   vtkBooleanMacro(ClampValue,int);
00080 
00082   virtual void Compute () = 0;
00083 
00085   virtual float Evaluate (float t) = 0;
00086 
00088   void AddPoint (float t, float x);
00089 
00091   void RemovePoint (float t);
00092  
00094   void RemoveAllPoints ();
00095 
00097 
00100   vtkSetMacro(Closed,int);
00101   vtkGetMacro(Closed,int);
00102   vtkBooleanMacro(Closed,int);
00104 
00106 
00114   vtkSetClampMacro(LeftConstraint,int,0,3);
00115   vtkGetMacro(LeftConstraint,int);
00116   vtkSetClampMacro(RightConstraint,int,0,3);
00117   vtkGetMacro(RightConstraint,int);
00119 
00121 
00123   vtkSetMacro(LeftValue,float);
00124   vtkGetMacro(LeftValue,float);
00125   vtkSetMacro(RightValue,float);
00126   vtkGetMacro(RightValue,float);
00128 
00130   unsigned long GetMTime();
00131 
00133   virtual void DeepCopy(vtkSpline *s);
00134 
00135 protected:
00136   vtkSpline();
00137   ~vtkSpline ();
00138 
00139   unsigned long ComputeTime;
00140   int ClampValue;
00141   float *Intervals;
00142   float *Coefficients;
00143   int LeftConstraint;
00144   float LeftValue;
00145   int RightConstraint;
00146   float RightValue;
00147   vtkPiecewiseFunction *PiecewiseFunction;
00148   int Closed;
00149 
00150   // Helper methods
00151   float ComputeLeftDerivative();
00152   float ComputeRightDerivative();
00153 
00154 private:
00155   vtkSpline(const vtkSpline&);  // Not implemented.
00156   void operator=(const vtkSpline&);  // Not implemented.
00157 };
00158 
00159 #endif
00160