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vtkRecursiveSphereDirectionEncoder.h

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00001 /*=========================================================================
00002 
00003   Program:   Visualization Toolkit
00004   Module:    $RCSfile: vtkRecursiveSphereDirectionEncoder.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 =========================================================================*/
00016 
00032 #ifndef __vtkRecursiveSphereDirectionEncoder_h
00033 #define __vtkRecursiveSphereDirectionEncoder_h
00034 
00035 #include "vtkDirectionEncoder.h"
00036 
00037 class VTK_RENDERING_EXPORT vtkRecursiveSphereDirectionEncoder : public vtkDirectionEncoder
00038 {
00039 public:
00040   vtkTypeRevisionMacro(vtkRecursiveSphereDirectionEncoder,vtkDirectionEncoder);
00041   void PrintSelf( ostream& os, vtkIndent indent );
00042 
00045   static vtkRecursiveSphereDirectionEncoder *New();
00046 
00047 
00049   int GetEncodedDirection( float n[3] );
00050   
00052   float *GetDecodedGradient( int value );
00053 
00055   int GetNumberOfEncodedDirections( void );
00056 
00061   float *GetDecodedGradientTable( void );
00062 
00064 
00076   vtkSetClampMacro( RecursionDepth, int, 0, 6 );
00077   vtkGetMacro( RecursionDepth, int );                                        
00079 
00080 protected:
00081   vtkRecursiveSphereDirectionEncoder();
00082   ~vtkRecursiveSphereDirectionEncoder();
00083 
00084   // How far to recursively divide the sphere
00085   int                     RecursionDepth;
00086   
00087   // The index table which maps (x,y) position in the rotated grid
00088   // to an encoded normal 
00089   //int                   IndexTable[2*NORM_SQR_SIZE - 1][2*NORM_SQR_SIZE -1];
00090   int                     *IndexTable;
00091 
00092   // This is a table that maps encoded normal (2 byte value) to a 
00093   // normal (dx, dy, dz)
00094   //float                 DecodedNormal[3*(1 + 2*(NORM_SQR_SIZE*NORM_SQR_SIZE+
00095   //                             (NORM_SQR_SIZE-1)*(NORM_SQR_SIZE-1)))];
00096   float                   *DecodedNormal;
00097 
00098   // Method to initialize the index table and variable that
00099   // stored the recursion depth the last time the table was
00100   // built
00101   void                  InitializeIndexTable( void );
00102   int                   IndexTableRecursionDepth;
00103 
00104   int                   OuterSize;
00105   int                   InnerSize;
00106   int                   GridSize;
00107 private:
00108   vtkRecursiveSphereDirectionEncoder(const vtkRecursiveSphereDirectionEncoder&);  // Not implemented.
00109   void operator=(const vtkRecursiveSphereDirectionEncoder&);  // Not implemented.
00110 }; 
00111 
00112 
00113 #endif
00114