vtkPixel.h

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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
#ifndef vtkPixel_h
#define vtkPixel_h

#include "vtkCell.h"
#include "vtkCommonDataModelModule.h" // For export macro

VTK_ABI_NAMESPACE_BEGIN
class vtkLine;
class vtkIncrementalPointLocator;

class VTKCOMMONDATAMODEL_EXPORT vtkPixel : public vtkCell
{
public:
  static vtkPixel* New();
  vtkTypeMacro(vtkPixel, vtkCell);
  void PrintSelf(ostream& os, vtkIndent indent) override;


  int GetCellType() override { return VTK_PIXEL; }
  int GetCellDimension() override { return 2; }
  int GetNumberOfEdges() override { return 4; }
  int GetNumberOfFaces() override { return 0; }
  vtkCell* GetEdge(int edgeId) override;
  vtkCell* GetFace(int) override { return nullptr; }
  int CellBoundary(int subId, const double pcoords[3], vtkIdList* pts) override;
  void Contour(double value, vtkDataArray* cellScalars, vtkIncrementalPointLocator* locator,
    vtkCellArray* verts, vtkCellArray* lines, vtkCellArray* polys, vtkPointData* inPd,
    vtkPointData* outPd, vtkCellData* inCd, vtkIdType cellId, vtkCellData* outCd) override;
  void Clip(double value, vtkDataArray* cellScalars, vtkIncrementalPointLocator* locator,
    vtkCellArray* polys, vtkPointData* inPd, vtkPointData* outPd, vtkCellData* inCd,
    vtkIdType cellId, vtkCellData* outCd, int insideOut) override;
  int EvaluatePosition(const double x[3], double closestPoint[3], int& subId, double pcoords[3],
    double& dist2, double weights[]) override;
  void EvaluateLocation(int& subId, const double pcoords[3], double x[3], double* weights) override;

  int Inflate(double dist) override;

  double ComputeBoundingSphere(double center[3]) const override;

  int GetParametricCenter(double pcoords[3]) override;

  int IntersectWithLine(const double p1[3], const double p2[3], double tol, double& t, double x[3],
    double pcoords[3], int& subId) override;
  int TriangulateLocalIds(int index, vtkIdList* ptIds) override;
  void Derivatives(
    int subId, const double pcoords[3], const double* values, int dim, double* derivs) override;
  double* GetParametricCoords() override;

  static void InterpolationFunctions(const double pcoords[3], double weights[4]);
  static void InterpolationDerivs(const double pcoords[3], double derivs[8]);

  void InterpolateFunctions(const double pcoords[3], double weights[4]) override
  {
    vtkPixel::InterpolationFunctions(pcoords, weights);
  }
  void InterpolateDerivs(const double pcoords[3], double derivs[8]) override
  {
    vtkPixel::InterpolationDerivs(pcoords, derivs);
  }

  int ComputeNormal(double n[3]);

  static const vtkIdType* GetEdgeArray(vtkIdType edgeId);

protected:
  vtkPixel();
  ~vtkPixel() override = default;

  vtkSmartPointer<vtkLine> Line;

private:
  vtkPixel(const vtkPixel&) = delete;
  void operator=(const vtkPixel&) = delete;
};

//----------------------------------------------------------------------------
inline int vtkPixel::GetParametricCenter(double pcoords[3])
{
  pcoords[0] = pcoords[1] = 0.5;
  pcoords[2] = 0.0;
  return 0;
}

VTK_ABI_NAMESPACE_END
#endif