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vtkRecursiveSphereDirectionEncoder.h

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00001 /*=========================================================================
00002 
00003   Program:   Visualization Toolkit
00004   Module:    $RCSfile: vtkRecursiveSphereDirectionEncoder.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 =========================================================================*/
00015 
00028 #ifndef __vtkRecursiveSphereDirectionEncoder_h
00029 #define __vtkRecursiveSphereDirectionEncoder_h
00030 
00031 #include "vtkDirectionEncoder.h"
00032 
00033 class VTK_VOLUMERENDERING_EXPORT vtkRecursiveSphereDirectionEncoder : public vtkDirectionEncoder
00034 {
00035 public:
00036   vtkTypeRevisionMacro(vtkRecursiveSphereDirectionEncoder,vtkDirectionEncoder);
00037   void PrintSelf( ostream& os, vtkIndent indent );
00038 
00041   static vtkRecursiveSphereDirectionEncoder *New();
00042 
00043 
00045   int GetEncodedDirection( float n[3] );
00046   
00048   float *GetDecodedGradient( int value );
00049 
00051   int GetNumberOfEncodedDirections( void );
00052 
00057   float *GetDecodedGradientTable( void );
00058 
00060 
00072   vtkSetClampMacro( RecursionDepth, int, 0, 6 );
00073   vtkGetMacro( RecursionDepth, int );                                        
00075 
00076 protected:
00077   vtkRecursiveSphereDirectionEncoder();
00078   ~vtkRecursiveSphereDirectionEncoder();
00079 
00080   // How far to recursively divide the sphere
00081   int                     RecursionDepth;
00082   
00083   // The index table which maps (x,y) position in the rotated grid
00084   // to an encoded normal 
00085   //int                   IndexTable[2*NORM_SQR_SIZE - 1][2*NORM_SQR_SIZE -1];
00086   int                     *IndexTable;
00087 
00088   // This is a table that maps encoded normal (2 byte value) to a 
00089   // normal (dx, dy, dz)
00090   //float                 DecodedNormal[3*(1 + 2*(NORM_SQR_SIZE*NORM_SQR_SIZE+
00091   //                             (NORM_SQR_SIZE-1)*(NORM_SQR_SIZE-1)))];
00092   float                   *DecodedNormal;
00093 
00094   // Method to initialize the index table and variable that
00095   // stored the recursion depth the last time the table was
00096   // built
00097   void                  InitializeIndexTable( void );
00098   int                   IndexTableRecursionDepth;
00099 
00100   int                   OuterSize;
00101   int                   InnerSize;
00102   int                   GridSize;
00103 private:
00104   vtkRecursiveSphereDirectionEncoder(const vtkRecursiveSphereDirectionEncoder&);  // Not implemented.
00105   void operator=(const vtkRecursiveSphereDirectionEncoder&);  // Not implemented.
00106 }; 
00107 
00108 
00109 #endif
00110 

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