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common/vtkCellArray.h

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

  Program:   Visualization Toolkit
  Module:    $RCSfile: vtkCellArray.h,v $
  Language:  C++


Copyright (c) 1993-2001 Ken Martin, Will Schroeder, Bill Lorensen 
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

 * Redistributions of source code must retain the above copyright notice,
   this list of conditions and the following disclaimer.

 * Redistributions in binary form must reproduce the above copyright notice,
   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution.

 * Neither name of Ken Martin, Will Schroeder, or Bill Lorensen nor the names
   of any contributors may be used to endorse or promote products derived
   from this software without specific prior written permission.

 * Modified source versions must be plainly marked as such, and must not be
   misrepresented as being the original software.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

=========================================================================*/
#ifndef __vtkCellArray_h
#define __vtkCellArray_h

#include "vtkIntArray.h"
#include "vtkCell.h"

class VTK_EXPORT vtkCellArray : public vtkObject
{
public:
  vtkTypeMacro(vtkCellArray,vtkObject);

  static vtkCellArray *New();

  int Allocate(const int sz, const int ext=1000) 
    {return this->Ia->Allocate(sz,ext);}

  void Initialize() 
    {this->Ia->Initialize();}

  int GetNumberOfCells() 
    {return this->NumberOfCells;}

  int EstimateSize(int numCells, int maxPtsPerCell)
    {return numCells*(1+maxPtsPerCell);}

  void InitTraversal() {this->TraversalLocation=0;};

  int GetNextCell(int& npts, int* &pts);

  int GetSize() 
    {return this->Ia->GetSize();}
  
  int GetNumberOfConnectivityEntries() 
    {return this->Ia->GetMaxId()+1;}

  void GetCell(int loc, int &npts, int* &pts);

  int InsertNextCell(vtkCell *cell);

  int InsertNextCell(int npts, int* pts);

  int InsertNextCell(vtkIdList *pts);

  int InsertNextCell(int npts);

  void InsertCellPoint(int id);

  void UpdateCellCount(int npts);

  int GetInsertLocation(int npts) {return (this->InsertLocation - npts - 1);};
  
  int GetTraversalLocation() 
    {return this->TraversalLocation;}
  void SetTraversalLocation(int loc) 
    {this->TraversalLocation = loc;}
  
  int GetTraversalLocation(int npts) 
    {return(this->TraversalLocation-npts-1);}
  
  void ReverseCell(int loc);

  void ReplaceCell(int loc, int npts, int *pts);

  int GetMaxCellSize();

  int *GetPointer() 
    {return this->Ia->GetPointer(0);}

  int *WritePointer(const int ncells, const int size);

  void SetCells(int ncells, vtkIntArray *cells);
  
  void DeepCopy(vtkCellArray *ca);

  vtkDataArray *GetData() 
    {return this->Ia;}

  void Reset();

  void Squeeze() 
    {this->Ia->Squeeze();}

  unsigned long GetActualMemorySize();
  
#ifndef VTK_REMOVE_LEGACY_CODE

  int InsertNextCell(vtkIdList &pts);
#endif
  
protected:
  vtkCellArray();
  vtkCellArray (const int sz, const int ext=1000);
  ~vtkCellArray();
  vtkCellArray(const vtkCellArray&) {};
  void operator=(const vtkCellArray&) {};

  int NumberOfCells;
  int InsertLocation;     //keep track of current insertion point
  int TraversalLocation;   //keep track of traversal position
  vtkIntArray *Ia;
};


inline int vtkCellArray::InsertNextCell(int npts, int* pts)
{
  int i = this->Ia->GetMaxId() + 1;
  int *ptr = this->Ia->WritePointer(i,npts+1);
  
  for ( *ptr++ = npts, i = 0; i < npts; i++)
    {
    *ptr++ = *pts++;
    }

  this->NumberOfCells++;
  this->InsertLocation += npts + 1;

  return this->NumberOfCells - 1;
}

inline int vtkCellArray::InsertNextCell(vtkIdList *pts)
{
  int npts = pts->GetNumberOfIds();
  int i = this->Ia->GetMaxId() + 1;
  int *ptr = this->Ia->WritePointer(i,npts+1);
  
  for ( *ptr++ = npts, i = 0; i < npts; i++)
    {
    *ptr++ = pts->GetId(i);
    }

  this->NumberOfCells++;
  this->InsertLocation += npts + 1;

  return this->NumberOfCells - 1;
}

inline int vtkCellArray::InsertNextCell(int npts)
{
  this->InsertLocation = this->Ia->InsertNextValue(npts) + 1;
  this->NumberOfCells++;

  return this->NumberOfCells - 1;
}

inline void vtkCellArray::InsertCellPoint(int id) 
{
  this->Ia->InsertValue(this->InsertLocation++,id);
}

inline void vtkCellArray::UpdateCellCount(int npts) 
{
  this->Ia->SetValue(this->InsertLocation-npts-1, npts);
}

inline int vtkCellArray::InsertNextCell(vtkCell *cell)
{
  int npts = cell->GetNumberOfPoints();
  int i = this->Ia->GetMaxId() + 1;
  int *ptr = this->Ia->WritePointer(i,npts+1);
  
  for ( *ptr++ = npts, i = 0; i < npts; i++)
    {
    *ptr++ = cell->PointIds->GetId(i);
    }

  this->NumberOfCells++;
  this->InsertLocation += npts + 1;

  return this->NumberOfCells - 1;
}


inline void vtkCellArray::Reset() 
{
  this->NumberOfCells = 0;
  this->InsertLocation = 0;
  this->TraversalLocation = 0;
  this->Ia->Reset();
}


inline int vtkCellArray::GetNextCell(int& npts, int* &pts)
{
  if ( this->Ia->GetMaxId() >= 0 && 
  this->TraversalLocation <= this->Ia->GetMaxId() ) 
    {
    npts = this->Ia->GetValue(this->TraversalLocation++);
    pts = this->Ia->GetPointer(this->TraversalLocation);
    this->TraversalLocation += npts;
    return 1;
    }
  else
    {
    return 0;
    }
}

inline void vtkCellArray::GetCell(int loc, int &npts, int* &pts)
{
  npts=this->Ia->GetValue(loc++); pts=this->Ia->GetPointer(loc);
}


inline void vtkCellArray::ReverseCell(int loc)
{
  int i, tmp;
  int npts=this->Ia->GetValue(loc);
  int *pts=this->Ia->GetPointer(loc+1);
  for (i=0; i < (npts/2); i++) 
    {
    tmp = pts[i];
    pts[i] = pts[npts-i-1];
    pts[npts-i-1] = tmp;
    }
}

inline void vtkCellArray::ReplaceCell(int loc, int npts, int *pts)
{
  int *oldPts=this->Ia->GetPointer(loc+1);
  for (int i=0; i < npts; i++)
    {
    oldPts[i] = pts[i];
    }
}

inline int *vtkCellArray::WritePointer(const int ncells, const int size)
{
  this->NumberOfCells = ncells;
  this->InsertLocation = 0;
  this->TraversalLocation = 0;
  return this->Ia->WritePointer(0,size);
}

#endif

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