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97 lines
3.7 KiB
C++
97 lines
3.7 KiB
C++
/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkTriangleStrip.h
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Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
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All rights reserved.
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See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
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This software is distributed WITHOUT ANY WARRANTY; without even
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the above copyright notice for more information.
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=========================================================================*/
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/**
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* @class vtkTriangleStrip
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* @brief a cell that represents a triangle strip
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*
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* vtkTriangleStrip is a concrete implementation of vtkCell to represent a 2D
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* triangle strip. A triangle strip is a compact representation of triangles
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* connected edge to edge in strip fashion. The connectivity of a triangle
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* strip is three points defining an initial triangle, then for each
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* additional triangle, a single point that, combined with the previous two
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* points, defines the next triangle.
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*/
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#ifndef vtkTriangleStrip_h
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#define vtkTriangleStrip_h
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#include "vtkCell.h"
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#include "vtkCommonDataModelModule.h" // For export macro
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class vtkLine;
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class vtkTriangle;
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class vtkIncrementalPointLocator;
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class VTKCOMMONDATAMODEL_EXPORT vtkTriangleStrip : public vtkCell
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{
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public:
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static vtkTriangleStrip* New();
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vtkTypeMacro(vtkTriangleStrip, vtkCell);
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void PrintSelf(ostream& os, vtkIndent indent) override;
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//@{
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/**
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* See the vtkCell API for descriptions of these methods.
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*/
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int GetCellType() override { return VTK_TRIANGLE_STRIP; }
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int GetCellDimension() override { return 2; }
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int GetNumberOfEdges() override { return this->GetNumberOfPoints(); }
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int GetNumberOfFaces() override { return 0; }
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vtkCell* GetEdge(int edgeId) override;
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vtkCell* GetFace(int vtkNotUsed(faceId)) override { return nullptr; }
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int CellBoundary(int subId, const double pcoords[3], vtkIdList* pts) override;
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void Contour(double value, vtkDataArray* cellScalars, vtkIncrementalPointLocator* locator,
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vtkCellArray* verts, vtkCellArray* lines, vtkCellArray* polys, vtkPointData* inPd,
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vtkPointData* outPd, vtkCellData* inCd, vtkIdType cellId, vtkCellData* outCd) override;
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void Clip(double value, vtkDataArray* cellScalars, vtkIncrementalPointLocator* locator,
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vtkCellArray* polys, vtkPointData* inPd, vtkPointData* outPd, vtkCellData* inCd,
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vtkIdType cellId, vtkCellData* outCd, int insideOut) override;
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//@}
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int EvaluatePosition(const double x[3], double closestPoint[3], int& subId, double pcoords[3],
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double& dist2, double weights[]) override;
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void EvaluateLocation(int& subId, const double pcoords[3], double x[3], double* weights) override;
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int IntersectWithLine(const double p1[3], const double p2[3], double tol, double& t, double x[3],
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double pcoords[3], int& subId) override;
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int Triangulate(int index, vtkIdList* ptIds, vtkPoints* pts) override;
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void Derivatives(
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int subId, const double pcoords[3], const double* values, int dim, double* derivs) override;
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int IsPrimaryCell() override { return 0; }
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/**
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* Return the center of the point cloud in parametric coordinates.
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*/
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int GetParametricCenter(double pcoords[3]) override;
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/**
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* Given a triangle strip, decompose it into a list of (triangle)
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* polygons. The polygons are appended to the end of the list of triangles.
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*/
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static void DecomposeStrip(int npts, const vtkIdType* pts, vtkCellArray* tris);
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protected:
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vtkTriangleStrip();
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~vtkTriangleStrip() override;
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vtkLine* Line;
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vtkTriangle* Triangle;
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private:
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vtkTriangleStrip(const vtkTriangleStrip&) = delete;
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void operator=(const vtkTriangleStrip&) = delete;
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};
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#endif
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