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/*=========================================================================
Program: Visualization Toolkit
Module: vtkCPExodusIIElementBlock.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.
=========================================================================*/
// .NAME vtkCPExodusIIElementBlock - Uses an Exodus II element block as a
// vtkMappedUnstructuredGrid's implementation.
//
// .SECTION Description
// This class allows raw data arrays returned by the Exodus II library to be
// used directly in VTK without repacking the data into the vtkUnstructuredGrid
// memory layout. Use the vtkCPExodusIIInSituReader to read an Exodus II file's
// data into this structure.
#ifndef vtkCPExodusIIElementBlock_h
#define vtkCPExodusIIElementBlock_h
#include "vtkObject.h"
#include "vtkIOExodusModule.h" // For export macro
#include "vtkMappedUnstructuredGrid.h" // For mapped unstructured grid wrapper
#include <string> // For std::string
class vtkGenericCell;
class VTKIOEXODUS_EXPORT vtkCPExodusIIElementBlockImpl : public vtkObject
{
public:
static vtkCPExodusIIElementBlockImpl *New();
virtual void PrintSelf(ostream &os, vtkIndent indent);
vtkTypeMacro(vtkCPExodusIIElementBlockImpl, vtkObject)
// Description:
// Set the Exodus element block data. 'elements' is the array returned from
// ex_get_elem_conn. 'type', 'numElements', and 'nodesPerElement' are obtained
// from ex_get_elem_block. Returns true or false depending on whether or not
// the element type can be translated into a VTK cell type. This object takes
// ownership of the elements array unless this function returns false.
bool SetExodusConnectivityArray(int *elements, const std::string &type,
int numElements, int nodesPerElement);
// API for vtkMappedUnstructuredGrid's implementation.
vtkIdType GetNumberOfCells();
int GetCellType(vtkIdType cellId);
void GetCellPoints(vtkIdType cellId, vtkIdList *ptIds);
void GetPointCells(vtkIdType ptId, vtkIdList *cellIds);
int GetMaxCellSize();
void GetIdsOfCellsOfType(int type, vtkIdTypeArray *array);
int IsHomogeneous();
// This container is read only -- these methods do nothing but print a
// warning.
void Allocate(vtkIdType numCells, int extSize = 1000);
vtkIdType InsertNextCell(int type, vtkIdList *ptIds);
vtkIdType InsertNextCell(int type, vtkIdType npts, vtkIdType *ptIds);
vtkIdType InsertNextCell(int type, vtkIdType npts, vtkIdType *ptIds,
vtkIdType nfaces, vtkIdType *faces);
void ReplaceCell(vtkIdType cellId, int npts, vtkIdType *pts);
protected:
vtkCPExodusIIElementBlockImpl();
~vtkCPExodusIIElementBlockImpl();
private:
vtkCPExodusIIElementBlockImpl(const vtkCPExodusIIElementBlockImpl &); // Not implemented.
void operator=(const vtkCPExodusIIElementBlockImpl &); // Not implemented.
// Convert between Exodus node ids and VTK point ids.
static vtkIdType NodeToPoint(const int &id)
{
return static_cast<vtkIdType>(id - 1);
}
static int PointToNode(const vtkIdType &id)
{
return static_cast<int>(id + 1);
}
// Convenience methods to get pointers into the element array.
int* GetElementStart(vtkIdType cellId) const
{
return this->Elements + (cellId * this->CellSize);
}
int* GetElementEnd(vtkIdType cellId) const
{
return this->Elements + (cellId * this->CellSize) + this->CellSize;
}
int* GetStart() const { return this->Elements; }
int* GetEnd() const
{
return this->Elements + (this->NumberOfCells * this->CellSize);
}
int *Elements;
int CellType;
int CellSize;
vtkIdType NumberOfCells;
};
vtkMakeExportedMappedUnstructuredGrid(vtkCPExodusIIElementBlock,
vtkCPExodusIIElementBlockImpl,
VTKIOEXODUS_EXPORT)
#endif //vtkCPExodusIIElementBlock_h
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