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 00056 #ifndef __vtkRecursiveSphereDirectionEncoder_h 00057 #define __vtkRecursiveSphereDirectionEncoder_h 00058 00059 #include "vtkDirectionEncoder.h" 00060 00061 class VTK_RENDERING_EXPORT vtkRecursiveSphereDirectionEncoder : public vtkDirectionEncoder 00062 { 00063 public: 00064 vtkTypeMacro(vtkRecursiveSphereDirectionEncoder,vtkDirectionEncoder); 00065 void PrintSelf( ostream& os, vtkIndent index ); 00066 00069 static vtkRecursiveSphereDirectionEncoder *New(); 00070 00071 00073 int GetEncodedDirection( float n[3] ); 00074 00076 float *GetDecodedGradient( int value ); 00077 00079 int GetNumberOfEncodedDirections( void ); 00080 00085 float *GetDecodedGradientTable( void ); 00086 00088 00100 vtkSetClampMacro( RecursionDepth, int, 0, 6 ); 00101 vtkGetMacro( RecursionDepth, int ); 00103 00104 protected: 00105 vtkRecursiveSphereDirectionEncoder(); 00106 ~vtkRecursiveSphereDirectionEncoder(); 00107 00108 // How far to recursively divide the sphere 00109 int RecursionDepth; 00110 00111 // The index table which maps (x,y) position in the rotated grid 00112 // to an encoded normal 00113 //int IndexTable[2*NORM_SQR_SIZE - 1][2*NORM_SQR_SIZE -1]; 00114 int *IndexTable; 00115 00116 // This is a table that maps encoded normal (2 byte value) to a 00117 // normal (dx, dy, dz) 00118 //float DecodedNormal[3*(1 + 2*(NORM_SQR_SIZE*NORM_SQR_SIZE+ 00119 // (NORM_SQR_SIZE-1)*(NORM_SQR_SIZE-1)))]; 00120 float *DecodedNormal; 00121 00122 // Method to initialize the index table and variable that 00123 // stored the recursion depth the last time the table was 00124 // built 00125 void InitializeIndexTable( void ); 00126 int IndexTableRecursionDepth; 00127 00128 int OuterSize; 00129 int InnerSize; 00130 int GridSize; 00131 private: 00132 vtkRecursiveSphereDirectionEncoder(const vtkRecursiveSphereDirectionEncoder&); // Not implemented. 00133 void operator=(const vtkRecursiveSphereDirectionEncoder&); // Not implemented. 00134 }; 00135 00136 00137 #endif 00138