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dox/Graphics/vtkRibbonFilter.h

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00001 /*=========================================================================
00002 
00003   Program:   Visualization Toolkit
00004   Module:    $RCSfile: vtkRibbonFilter.h,v $
00005 
00006   Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
00007   All rights reserved.
00008   See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
00009 
00010      This software is distributed WITHOUT ANY WARRANTY; without even
00011      the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
00012      PURPOSE.  See the above copyright notice for more information.
00013 
00014 =========================================================================*/
00038 #ifndef __vtkRibbonFilter_h
00039 #define __vtkRibbonFilter_h
00040 
00041 #include "vtkPolyDataAlgorithm.h"
00042 
00043 #define VTK_TCOORDS_OFF                    0
00044 #define VTK_TCOORDS_FROM_NORMALIZED_LENGTH 1
00045 #define VTK_TCOORDS_FROM_LENGTH            2
00046 #define VTK_TCOORDS_FROM_SCALARS           3
00047 
00048 class vtkCellArray;
00049 class vtkCellData;
00050 class vtkDataArray;
00051 class vtkFloatArray;
00052 class vtkPointData;
00053 class vtkPoints;
00054 
00055 class VTK_GRAPHICS_EXPORT vtkRibbonFilter : public vtkPolyDataAlgorithm 
00056 {
00057 public:
00058   vtkTypeRevisionMacro(vtkRibbonFilter,vtkPolyDataAlgorithm);
00059   void PrintSelf(ostream& os, vtkIndent indent);
00060 
00063   static vtkRibbonFilter *New();
00064 
00066 
00068   vtkSetClampMacro(Width,double,0,VTK_DOUBLE_MAX);
00069   vtkGetMacro(Width,double);
00071 
00073 
00075   vtkSetClampMacro(Angle,double,0,360);
00076   vtkGetMacro(Angle,double);
00078 
00080 
00081   vtkSetMacro(VaryWidth,int);
00082   vtkGetMacro(VaryWidth,int);
00083   vtkBooleanMacro(VaryWidth,int);
00085 
00087 
00089   vtkSetMacro(WidthFactor,double);
00090   vtkGetMacro(WidthFactor,double);
00092 
00094 
00096   vtkSetVector3Macro(DefaultNormal,double);
00097   vtkGetVectorMacro(DefaultNormal,double,3);
00099 
00101 
00103   vtkSetMacro(UseDefaultNormal,int);
00104   vtkGetMacro(UseDefaultNormal,int);
00105   vtkBooleanMacro(UseDefaultNormal,int);
00107 
00109 
00111   vtkSetClampMacro(GenerateTCoords,int,VTK_TCOORDS_OFF,
00112                    VTK_TCOORDS_FROM_SCALARS);
00113   vtkGetMacro(GenerateTCoords,int);
00114   void SetGenerateTCoordsToOff()
00115     {this->SetGenerateTCoords(VTK_TCOORDS_OFF);}
00116   void SetGenerateTCoordsToNormalizedLength()
00117     {this->SetGenerateTCoords(VTK_TCOORDS_FROM_NORMALIZED_LENGTH);}
00118   void SetGenerateTCoordsToUseLength()
00119     {this->SetGenerateTCoords(VTK_TCOORDS_FROM_LENGTH);}
00120   void SetGenerateTCoordsToUseScalars()
00121     {this->SetGenerateTCoords(VTK_TCOORDS_FROM_SCALARS);}
00122   const char *GetGenerateTCoordsAsString();
00124 
00126 
00130   vtkSetClampMacro(TextureLength,double,0.000001,VTK_LARGE_INTEGER);
00131   vtkGetMacro(TextureLength,double);
00133 
00134 protected:
00135   vtkRibbonFilter();
00136   ~vtkRibbonFilter();
00137 
00138   int RequestData(vtkInformation *, vtkInformationVector **, vtkInformationVector *);
00139   double Width;
00140   double Angle;
00141   int VaryWidth; //controls whether width varies with scalar data
00142   double WidthFactor;
00143   double DefaultNormal[3];
00144   int UseDefaultNormal;
00145   int GenerateTCoords; //control texture coordinate generation
00146   double TextureLength; //this length is mapped to [0,1) texture space
00147 
00148   // Helper methods
00149   int GeneratePoints(vtkIdType offset, vtkIdType npts, vtkIdType *pts,
00150                      vtkPoints *inPts, vtkPoints *newPts, 
00151                      vtkPointData *pd, vtkPointData *outPD,
00152                      vtkFloatArray *newNormals, vtkDataArray *inScalars,
00153                      double range[2], vtkDataArray *inNormals);
00154   void GenerateStrip(vtkIdType offset, vtkIdType npts, vtkIdType *pts, 
00155                      vtkIdType inCellId, vtkCellData *cd, vtkCellData *outCD,
00156                      vtkCellArray *newStrips);
00157   void GenerateTextureCoords(vtkIdType offset, vtkIdType npts, vtkIdType *pts,
00158                              vtkPoints *inPts, vtkDataArray *inScalars,
00159                              vtkFloatArray *newTCoords);
00160   vtkIdType ComputeOffset(vtkIdType offset,vtkIdType npts);
00161   
00162   // Helper data members
00163   double Theta;
00164 
00165 private:
00166   vtkRibbonFilter(const vtkRibbonFilter&);  // Not implemented.
00167   void operator=(const vtkRibbonFilter&);  // Not implemented.
00168 };
00169 
00170 #endif

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