vtkDGCell.h

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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
#ifndef vtkDGCell_h
#define vtkDGCell_h
 
#include "vtkFiltersCellGridModule.h" // for export macro
 
#include "vtkCellMetadata.h"
#include "vtkStringToken.h" // for vtkStringToken::Hash
 
#include <vector> // for side connectivity
 
VTK_ABI_NAMESPACE_BEGIN
class vtkCellAttribute;
class vtkCellGrid;
class vtkDataSetAttributes;
class vtkTypeFloat32Array;
class vtkTypeInt32Array;
 
class VTKFILTERSCELLGRID_EXPORT vtkDGCell : public vtkCellMetadata
{
public:
  vtkTypeMacro(vtkDGCell, vtkCellMetadata);
  void PrintSelf(ostream& os, vtkIndent indent) override;
 
  enum Shape : int
  {
    Vertex,        
    Edge,          
    Triangle,      
    Quadrilateral, 
    Tetrahedron,   
    Hexahedron,    
    Wedge,         
    Pyramid        
 
    // It is probably more efficient to create a new cell type for arbitrary shapes
    // than to attempt generalizing vtkDGCell, but for the sake of completeness:
    // Polygon       //!< We may one day support an n-sided polygonal face.
    // Polyhedron    //!< We may one day support an n-faced polyhedral volume with polygonal sides.
  };
 
  static int GetShapeCornerCount(Shape shape);
  static int GetShapeDimension(Shape shape);
  static vtkStringToken GetShapeName(Shape shape);
 
  virtual Shape GetShape() const = 0;
 
  virtual int GetDimension() const { return vtkDGCell::GetShapeDimension(this->GetShape()); }
 
  virtual int GetNumberOfCorners() const
  {
    return vtkDGCell::GetShapeCornerCount(this->GetShape());
  }
 
  virtual const std::array<double, 3>& GetCornerParameter(int corner) const = 0;
 
  virtual int GetNumberOfSideTypes() const = 0;
 
  virtual std::pair<int, int> GetSideRangeForType(int sideType) const = 0;
 
  virtual int GetNumberOfSidesOfDimension(int dimension) const = 0;
 
  virtual Shape GetSideShape(int side) const = 0;
 
  virtual const std::vector<vtkIdType>& GetSideConnectivity(int side) const = 0;
 
  virtual vtkTypeFloat32Array* GetReferencePoints() const = 0;
 
  virtual vtkTypeInt32Array* GetSideConnectivity() const = 0;
 
  virtual vtkTypeInt32Array* GetSideOffsetsAndShapes() const = 0;
 
  void FillReferencePoints(vtkTypeFloat32Array* arr) const;
 
  void FillSideConnectivity(vtkTypeInt32Array* arr) const;
 
  void FillSideOffsetsAndShapes(vtkTypeInt32Array* arr) const;
 
protected:
  vtkDGCell();
  ~vtkDGCell() override;
 
private:
  vtkDGCell(const vtkDGCell&) = delete;
  void operator=(const vtkDGCell&) = delete;
};
 
VTK_ABI_NAMESPACE_END
#endif