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/*=========================================================================
Program: Visualization Toolkit
Module: vtkBezierTriangle.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.
=========================================================================*/
/**
* @class vtkBezierTriangle
* @brief A 2D cell that represents an arbitrary order Bezier triangle
*
* vtkBezierTriangle is a concrete implementation of vtkCell to represent a
* 2D triangle using Bezier shape functions of user specified order.
*
* The number of points in a Bezier cell determines the order over which they
* are iterated relative to the parametric coordinate system of the cell. The
* first points that are reported are vertices. They appear in the same order in
* which they would appear in linear cells. Mid-edge points are reported next.
* They are reported in sequence. For two- and three-dimensional (3D) cells, the
* following set of points to be reported are face points. Finally, 3D cells
* report points interior to their volume.
*/
#ifndef vtkBezierTriangle_h
#define vtkBezierTriangle_h
#include "vtkCommonDataModelModule.h" // For export macro
#include "vtkHigherOrderTriangle.h"
class vtkDoubleArray;
class vtkBezierCurve;
class vtkTriangle;
class vtkDataSet;
class VTKCOMMONDATAMODEL_EXPORT vtkBezierTriangle : public vtkHigherOrderTriangle
{
public:
static vtkBezierTriangle* New();
vtkTypeMacro(vtkBezierTriangle, vtkHigherOrderTriangle);
void PrintSelf(ostream& os, vtkIndent indent) override;
int GetCellType() override { return VTK_BEZIER_TRIANGLE; }
vtkCell* GetEdge(int edgeId) override;
void EvaluateLocationProjectedNode(
int& subId, const vtkIdType point_id, double x[3], double* weights);
void SetRationalWeightsFromPointData(vtkPointData* point_data, const vtkIdType numPts);
void InterpolateFunctions(const double pcoords[3], double* weights) override;
void InterpolateDerivs(const double pcoords[3], double* derivs) override;
virtual vtkHigherOrderCurve* getEdgeCell() override;
vtkDoubleArray* GetRationalWeights();
protected:
vtkBezierTriangle();
~vtkBezierTriangle() override;
vtkNew<vtkBezierCurve> EdgeCell;
vtkNew<vtkDoubleArray> RationalWeights;
private:
vtkBezierTriangle(const vtkBezierTriangle&) = delete;
void operator=(const vtkBezierTriangle&) = delete;
};
#endif
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