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vtkHull.h

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00001 /*=========================================================================
00002 
00003   Program:   Visualization Toolkit
00004   Module:    $RCSfile: vtkHull.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 =========================================================================*/
00043 #ifndef __vtkHull_h
00044 #define __vtkHull_h
00045 
00046 #include "vtkPolyDataAlgorithm.h"
00047 
00048 class vtkCellArray;
00049 class vtkPlanes;
00050 class vtkPoints;
00051 class vtkPolyData;
00052 
00053 class VTK_GRAPHICS_EXPORT vtkHull : public vtkPolyDataAlgorithm
00054 {
00055 public:
00056   static vtkHull *New();
00057   vtkTypeRevisionMacro(vtkHull,vtkPolyDataAlgorithm);
00058   void PrintSelf(ostream& os, vtkIndent indent);
00059 
00061   void RemoveAllPlanes( void );
00062 
00064 
00073   int  AddPlane( double A, double B, double C );
00074   int  AddPlane( double plane[3] );
00076 
00078 
00084   void SetPlane( int i, double A, double B, double C );
00085   void SetPlane( int i, double plane[3] );
00087 
00089 
00091   int AddPlane( double A, double B, double C, double D );
00092   int AddPlane( double plane[3], double D );
00093   void SetPlane( int i, double A, double B, double C, double D );
00094   void SetPlane( int i, double plane[3], double D );
00096 
00099   void SetPlanes( vtkPlanes *planes );
00100 
00102 
00103   vtkGetMacro( NumberOfPlanes, int );
00105   
00110   void AddCubeVertexPlanes();
00111 
00116   void AddCubeEdgePlanes();
00117 
00120   void AddCubeFacePlanes();
00121 
00129   void AddRecursiveSpherePlanes( int level );
00130 
00132 
00140   void GenerateHull(vtkPolyData *pd, double *bounds);
00141   void GenerateHull(vtkPolyData *pd, double xmin, double xmax,
00142                     double ymin, double ymax, double zmin, double zmax);
00144 
00145 protected:
00146   vtkHull();
00147   ~vtkHull();
00148 
00149   // The planes - 4 doubles per plane for A, B, C, D
00150   double     *Planes;
00151 
00152   // This indicates the current size (in planes - 4*sizeof(double)) of 
00153   // the this->Planes array. Planes are allocated in chunks so that the
00154   // array does not need to be reallocated every time a new plane is added
00155   int       PlanesStorageSize;
00156 
00157   // The number of planes that have been added
00158   int       NumberOfPlanes;
00159 
00160   // Internal method used to find the position of each plane
00161   void      ComputePlaneDistances(vtkPolyData *input);
00162 
00163   // Internal method used to create the actual polygons from the set 
00164   // of planes
00165   void      ClipPolygonsFromPlanes( vtkPoints *points, vtkCellArray *polys,
00166                                     double *bounds );
00167 
00168   // Internal method used to create the initial "big" polygon from the
00169   // plane equation. This polygon is clipped by all other planes to form
00170   // the final polygon (or it may be clipped entirely)
00171   void      CreateInitialPolygon( double *, int, double * );
00172 
00173   // The method that does it all...
00174   int RequestData(vtkInformation *, vtkInformationVector **, vtkInformationVector *);
00175 private:
00176   vtkHull(const vtkHull&);  // Not implemented.
00177   void operator=(const vtkHull&);  // Not implemented.
00178 };
00179 
00180 #endif

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