dox/Graphics/vtkHyperOctreeDualGridContourFilter.h

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/*=========================================================================

  Program:   Visualization Toolkit
  Module:    vtkHyperOctreeDualGridContourFilter.h

  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.

     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.

=========================================================================*/
#ifndef __vtkHyperOctreeDualGridContourFilter_h
#define __vtkHyperOctreeDualGridContourFilter_h

#include "vtkPolyDataAlgorithm.h"

#include "vtkContourValues.h" // Needed for inline methods
#include "vtkCutter.h" // for VTK_SORT_BY_VALUE

class vtkHyperOctree;
class vtkTetra;
class vtkHyperOctreeCursor;
class vtkHyperOctreeLightWeightCursor;

class vtkDataSetAttributes;
class vtkUnstructuredGrid;
class vtkUnsignedCharArray;
class vtkIdTypeArray;
class vtkBitArray;
class vtkIncrementalPointLocator;

class VTK_GRAPHICS_EXPORT vtkHyperOctreeDualGridContourFilter : public vtkPolyDataAlgorithm
{
public:
  vtkTypeMacro(vtkHyperOctreeDualGridContourFilter,vtkPolyDataAlgorithm);
  void PrintSelf(ostream& os, vtkIndent indent);

  static vtkHyperOctreeDualGridContourFilter *New();

  void SetValue(int i, double value)
    {
      this->ContourValues->SetValue(i,value);
    }


  double GetValue(int i)
    {
      return this->ContourValues->GetValue(i);
    }


  double *GetValues()
    {
      return this->ContourValues->GetValues();
    }


  void GetValues(double *contourValues)
    {
      this->ContourValues->GetValues(contourValues);
    }


  void SetNumberOfContours(int number)
    {
      this->ContourValues->SetNumberOfContours(number);
    }


  int GetNumberOfContours()
    {
      return this->ContourValues->GetNumberOfContours();
    }
  

  void GenerateValues(int numContours, double range[2])
    {
      this->ContourValues->GenerateValues(numContours, range);
    }
  

  void GenerateValues(int numContours, double
                      rangeStart, double rangeEnd)
    {
      this->ContourValues->GenerateValues(numContours, rangeStart, rangeEnd);
    }

  unsigned long GetMTime();


  void SetLocator(vtkIncrementalPointLocator *locator);
  vtkGetObjectMacro(Locator,vtkIncrementalPointLocator);

  void CreateDefaultLocator();

protected:
  vtkHyperOctreeDualGridContourFilter();
  ~vtkHyperOctreeDualGridContourFilter();
  
  virtual int RequestData(vtkInformation* request,
                          vtkInformationVector** inputVector,
                          vtkInformationVector* outputVector);
  virtual int RequestUpdateExtent(vtkInformation*,
                                  vtkInformationVector**,
                                  vtkInformationVector*);
  virtual int FillInputPortInformation(int port, vtkInformation *info);

  void ContourNode();
  
  void TraverseNeighborhoodRecursively(
                     vtkHyperOctreeLightWeightCursor* neighborhood,
                     unsigned short* xyzIds);
  void EvaluatePoint(vtkHyperOctreeLightWeightCursor* neighborhood,
                     unsigned short* xyzIds);

  void ContourNode1D();
  
  vtkContourValues *ContourValues;
  vtkIncrementalPointLocator *Locator;
  
  vtkHyperOctree *Input;
  vtkPolyData *Output;

  vtkCellArray *NewPolys;
  
  vtkDataSetAttributes *InPD;
  vtkDataSetAttributes *OutPD;
  vtkDataArray *InScalars;
  // To compute points on the fly.
  // These are set to the input origin and size.
  double Origin[3];
  double Size[3];
  
  // This is a table for traversing a neighborhood down an octree.
  // 8 children x 8 cursors
  // First three bits encode the child,  rest encode the cursor id.
  // 8xCursorId + childId.
  unsigned char NeighborhoodTraversalTable[64];
  void GenerateTraversalTable();

private:
  vtkHyperOctreeDualGridContourFilter(const vtkHyperOctreeDualGridContourFilter&);  // Not implemented.
  void operator=(const vtkHyperOctreeDualGridContourFilter&);  // Not implemented.
};
#endif