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/*=========================================================================
Program: Visualization Toolkit
Module: vtkTriangleStrip.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 vtkTriangleStrip
* @brief a cell that represents a triangle strip
*
* vtkTriangleStrip is a concrete implementation of vtkCell to represent a 2D
* triangle strip. A triangle strip is a compact representation of triangles
* connected edge to edge in strip fashion. The connectivity of a triangle
* strip is three points defining an initial triangle, then for each
* additional triangle, a single point that, combined with the previous two
* points, defines the next triangle.
*/
#ifndef vtkTriangleStrip_h
#define vtkTriangleStrip_h
#include "vtkCell.h"
#include "vtkCommonDataModelModule.h" // For export macro
class vtkLine;
class vtkTriangle;
class vtkIncrementalPointLocator;
class VTKCOMMONDATAMODEL_EXPORT vtkTriangleStrip : public vtkCell
{
public:
static vtkTriangleStrip* New();
vtkTypeMacro(vtkTriangleStrip, vtkCell);
void PrintSelf(ostream& os, vtkIndent indent) override;
//@{
/**
* See the vtkCell API for descriptions of these methods.
*/
int GetCellType() override { return VTK_TRIANGLE_STRIP; }
int GetCellDimension() override { return 2; }
int GetNumberOfEdges() override { return this->GetNumberOfPoints(); }
int GetNumberOfFaces() override { return 0; }
vtkCell* GetEdge(int edgeId) override;
vtkCell* GetFace(int vtkNotUsed(faceId)) 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 IntersectWithLine(const double p1[3], const double p2[3], double tol, double& t, double x[3],
double pcoords[3], int& subId) override;
int Triangulate(int index, vtkIdList* ptIds, vtkPoints* pts) override;
void Derivatives(
int subId, const double pcoords[3], const double* values, int dim, double* derivs) override;
int IsPrimaryCell() override { return 0; }
/**
* Return the center of the point cloud in parametric coordinates.
*/
int GetParametricCenter(double pcoords[3]) override;
/**
* Given a triangle strip, decompose it into a list of (triangle)
* polygons. The polygons are appended to the end of the list of triangles.
*/
static void DecomposeStrip(int npts, const vtkIdType* pts, vtkCellArray* tris);
protected:
vtkTriangleStrip();
~vtkTriangleStrip() override;
vtkLine* Line;
vtkTriangle* Triangle;
private:
vtkTriangleStrip(const vtkTriangleStrip&) = delete;
void operator=(const vtkTriangleStrip&) = delete;
};
#endif
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