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vtkTensor.h

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00001 /*=========================================================================
00002 
00003   Program:   Visualization Toolkit
00004   Module:    $RCSfile: vtkTensor.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 =========================================================================*/
00032 #ifndef __vtkTensor_h
00033 #define __vtkTensor_h
00034 
00035 #include "vtkObject.h"
00036 
00037 class VTK_COMMON_EXPORT vtkTensor : public vtkObject
00038 {
00039 public:
00040   static vtkTensor *New();
00041   vtkTypeRevisionMacro(vtkTensor,vtkObject);
00042 
00044   void Initialize();
00045 
00047   float GetComponent(int i, int j) {return this->T[i+3*j];};
00048 
00050 
00051   void SetComponent(int i, int j, float v) {if (i > 2 || j > 2) {vtkErrorMacro("trying to set tensor component i or j > 2: i = " << i << ", j = " << j); return;}; this->T[i+3*j] = v;};
00053 
00055 
00056   void AddComponent(int i, int j, float v) { if (i > 2 || j > 2) {vtkErrorMacro("trying to add tensor component i or j > 2: i = " << i << ", j = " << j); return;}; this->T[i+3*j] += v;};
00058 
00060 
00062   float *GetColumn(int j) { if (j > 2) {vtkErrorMacro("trying to get tensor column j > 2: j = " << j); return NULL;}; return this->T + 3*j;};
00064 
00066   void DeepCopy(vtkTensor *t);
00067 
00069   operator float*() {return this->T;};
00070 
00072   float *T;
00073   
00074 protected: 
00075   vtkTensor();
00076   ~vtkTensor() {};
00077 
00078   float Storage[9];
00079 private:
00080   vtkTensor(const vtkTensor&);  // Not implemented.
00081   void operator=(const vtkTensor&);  // Not implemented.
00082 };
00083 
00084 inline void vtkTensor::Initialize()
00085 {
00086   for (int j=0; j<3; j++)
00087     {
00088     for (int i=0; i<3; i++)
00089       {
00090       this->T[i+j*3] = 0.0;
00091       }
00092     }
00093 }
00094 
00095 inline void vtkTensor::DeepCopy(vtkTensor *t)
00096 {
00097   for (int j=0; j < 3; j++)
00098     {
00099     for (int i=0; i < 3; i++)
00100       {
00101       this->T[i+3*j] = t->T[i+3*j];
00102       }
00103     }
00104 }
00105 
00106 #endif