vtkQuadraticQuad.h

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

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

VTK_ABI_NAMESPACE_BEGIN
class vtkQuadraticEdge;
class vtkQuad;
class vtkDoubleArray;

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


  int GetCellType() override { return VTK_QUADRATIC_QUAD; }
  int GetCellDimension() override { return 2; }
  int GetNumberOfEdges() override { return 4; }
  int GetNumberOfFaces() override { return 0; }
  vtkCell* GetEdge(int) 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;
  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 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;

  void Clip(double value, vtkDataArray* cellScalars, vtkIncrementalPointLocator* locator,
    vtkCellArray* polys, vtkPointData* inPd, vtkPointData* outPd, vtkCellData* inCd,
    vtkIdType cellId, vtkCellData* outCd, int insideOut) 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 GetParametricCenter(double pcoords[3]) override;

  static void InterpolationFunctions(const double pcoords[3], double weights[8]);
  static void InterpolationDerivs(const double pcoords[3], double derivs[16]);

  void InterpolateFunctions(const double pcoords[3], double weights[8]) override
  {
    vtkQuadraticQuad::InterpolationFunctions(pcoords, weights);
  }
  void InterpolateDerivs(const double pcoords[3], double derivs[16]) override
  {
    vtkQuadraticQuad::InterpolationDerivs(pcoords, derivs);
  }

protected:
  vtkQuadraticQuad();
  ~vtkQuadraticQuad() override;

  vtkQuadraticEdge* Edge;
  vtkQuad* Quad;
  vtkPointData* PointData;
  vtkDoubleArray* Scalars;

  // In order to achieve some functionality we introduce a fake center point
  // which require to have some extra functionalities compare to other non-linar
  // cells
  vtkCellData* CellData;
  vtkDoubleArray* CellScalars;
  void Subdivide(double* weights);
  void InterpolateAttributes(
    vtkPointData* inPd, vtkCellData* inCd, vtkIdType cellId, vtkDataArray* cellScalars);

private:
  vtkQuadraticQuad(const vtkQuadraticQuad&) = delete;
  void operator=(const vtkQuadraticQuad&) = delete;
};
//----------------------------------------------------------------------------
inline int vtkQuadraticQuad::GetParametricCenter(double pcoords[3])
{
  pcoords[0] = pcoords[1] = 0.5;
  pcoords[2] = 0.;
  return 0;
}

VTK_ABI_NAMESPACE_END
#endif