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graphics/vtkRecursiveSphereDirectionEncoder.h

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00001 /*=========================================================================
00002 
00003   Program:   Visualization Toolkit
00004   Module:    $RCSfile: vtkRecursiveSphereDirectionEncoder.h,v $
00005   Language:  C++
00006 
00007 
00008 Copyright (c) 1993-2001 Ken Martin, Will Schroeder, Bill Lorensen 
00009 All rights reserved.
00010 
00011 Redistribution and use in source and binary forms, with or without
00012 modification, are permitted provided that the following conditions are met:
00013 
00014  * Redistributions of source code must retain the above copyright notice,
00015    this list of conditions and the following disclaimer.
00016 
00017  * Redistributions in binary form must reproduce the above copyright notice,
00018    this list of conditions and the following disclaimer in the documentation
00019    and/or other materials provided with the distribution.
00020 
00021  * Neither name of Ken Martin, Will Schroeder, or Bill Lorensen nor the names
00022    of any contributors may be used to endorse or promote products derived
00023    from this software without specific prior written permission.
00024 
00025  * Modified source versions must be plainly marked as such, and must not be
00026    misrepresented as being the original software.
00027 
00028 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
00029 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00030 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00031 ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE FOR
00032 ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
00033 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
00034 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
00035 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
00036 OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
00037 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00038 
00039 =========================================================================*/
00040 
00058 #ifndef __vtkRecursiveSphereDirectionEncoder_h
00059 #define __vtkRecursiveSphereDirectionEncoder_h
00060 
00061 #include "vtkDirectionEncoder.h"
00062 
00063 class VTK_EXPORT vtkRecursiveSphereDirectionEncoder : public vtkDirectionEncoder
00064 {
00065 public:
00066   vtkTypeMacro(vtkRecursiveSphereDirectionEncoder,vtkDirectionEncoder);
00067   void PrintSelf( ostream& os, vtkIndent index );
00068 
00071   static vtkRecursiveSphereDirectionEncoder *New();
00072 
00073 
00075   int GetEncodedDirection( float n[3] );
00076   
00078   float *GetDecodedGradient( int value );
00079 
00081   int GetNumberOfEncodedDirections( void );
00082 
00087   float *GetDecodedGradientTable( void );
00088 
00101   vtkSetClampMacro( RecursionDepth, int, 0, 6 );
00102   vtkGetMacro( RecursionDepth, int );                   
00103 
00104 protected:
00105   vtkRecursiveSphereDirectionEncoder();
00106   ~vtkRecursiveSphereDirectionEncoder();
00107   vtkRecursiveSphereDirectionEncoder(const vtkRecursiveSphereDirectionEncoder&) {};
00108   void operator=(const vtkRecursiveSphereDirectionEncoder&) {};
00109 
00110   // How far to recursively divide the sphere
00111   int                     RecursionDepth;
00112   
00113   // The index table which maps (x,y) position in the rotated grid
00114   // to an encoded normal 
00115   //int                   IndexTable[2*NORM_SQR_SIZE - 1][2*NORM_SQR_SIZE -1];
00116   int                     *IndexTable;
00117 
00118   // This is a table that maps encoded normal (2 byte value) to a 
00119   // normal (dx, dy, dz)
00120   //float                 DecodedNormal[3*(1 + 2*(NORM_SQR_SIZE*NORM_SQR_SIZE+
00121   //                             (NORM_SQR_SIZE-1)*(NORM_SQR_SIZE-1)))];
00122   float                   *DecodedNormal;
00123 
00124   // Method to initialize the index table and variable that
00125   // stored the recursion depth the last time the table was
00126   // built
00127   void                  InitializeIndexTable( void );
00128   int                   IndexTableRecursionDepth;
00129 
00130   int                   OuterSize;
00131   int                   InnerSize;
00132   int                   GridSize;
00133 }; 
00134 
00135 
00136 #endif
00137 

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