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219 lines
7.9 KiB
C++
219 lines
7.9 KiB
C++
/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkPyramid.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 vtkPyramid
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* @brief a 3D cell that represents a linear pyramid
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*
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* vtkPyramid is a concrete implementation of vtkCell to represent a 3D
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* pyramid. A pyramid consists of a rectangular base with four triangular
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* faces. vtkPyramid uses the standard isoparametric shape functions for
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* a linear pyramid. The pyramid is defined by the five points (0-4) where
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* (0,1,2,3) is the base of the pyramid which, using the right hand rule,
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* forms a quadrilaterial whose normal points in the direction of the
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* pyramid apex at vertex #4. The parametric location of vertex #4 is [0, 0, 1].
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*
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* @sa
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* vtkConvexPointSet vtkHexahedron vtkTetra vtkVoxel vtkWedge
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*/
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#ifndef vtkPyramid_h
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#define vtkPyramid_h
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#include "vtkCell3D.h"
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#include "vtkCommonDataModelModule.h" // For export macro
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class vtkLine;
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class vtkQuad;
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class vtkTriangle;
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class vtkUnstructuredGrid;
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class vtkIncrementalPointLocator;
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class VTKCOMMONDATAMODEL_EXPORT vtkPyramid : public vtkCell3D
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{
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public:
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static vtkPyramid* New();
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vtkTypeMacro(vtkPyramid, vtkCell3D);
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void PrintSelf(ostream& os, vtkIndent indent) override;
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//@{
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/**
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* See vtkCell3D API for description of these methods.
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*/
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void GetEdgePoints(vtkIdType edgeId, const vtkIdType*& pts) override;
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// @deprecated Replaced by GetEdgePoints(vtkIdType, const vtkIdType*&) as of VTK 9.0
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VTK_LEGACY(virtual void GetEdgePoints(int edgeId, int*& pts) override);
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vtkIdType GetFacePoints(vtkIdType faceId, const vtkIdType*& pts) override;
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// @deprecated Replaced by GetFacePoints(vtkIdType, const vtkIdType*&) as of VTK 9.0
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VTK_LEGACY(virtual void GetFacePoints(int faceId, int*& pts) override);
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void GetEdgeToAdjacentFaces(vtkIdType edgeId, const vtkIdType*& pts) override;
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vtkIdType GetFaceToAdjacentFaces(vtkIdType faceId, const vtkIdType*& faceIds) override;
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vtkIdType GetPointToIncidentEdges(vtkIdType pointId, const vtkIdType*& edgeIds) override;
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vtkIdType GetPointToIncidentFaces(vtkIdType pointId, const vtkIdType*& faceIds) override;
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vtkIdType GetPointToOneRingPoints(vtkIdType pointId, const vtkIdType*& pts) override;
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bool GetCentroid(double centroid[3]) const override;
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bool IsInsideOut() override;
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//@}
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/**
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* static constexpr handle on the number of points.
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*/
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static constexpr vtkIdType NumberOfPoints = 5;
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/**
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* static contexpr handle on the number of faces.
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*/
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static constexpr vtkIdType NumberOfEdges = 8;
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/**
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* static contexpr handle on the number of edges.
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*/
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static constexpr vtkIdType NumberOfFaces = 5;
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/**
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* static contexpr handle on the maximum face size. It can also be used
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* to know the number of faces adjacent to one face.
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*/
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static constexpr vtkIdType MaximumFaceSize = 4;
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/**
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* static constexpr handle on the maximum valence of this cell.
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* The valence of a vertex is the number of incident edges (or equivalently faces)
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* to this vertex. It is also equal to the size of a one ring neighborhood of a vertex.
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*/
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static constexpr vtkIdType MaximumValence = 4;
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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_PYRAMID; }
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int GetCellDimension() override { return 3; }
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int GetNumberOfEdges() override { return 8; }
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int GetNumberOfFaces() override { return 5; }
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vtkCell* GetEdge(int edgeId) override;
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vtkCell* GetFace(int faceId) override;
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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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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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double* GetParametricCoords() override;
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//@}
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/**
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* Return the case table for table-based isocontouring (aka marching cubes
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* style implementations). A linear 3D cell with N vertices will have 2**N
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* cases. The returned case array lists three edges in order to produce one
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* output triangle which may be repeated to generate multiple triangles. The
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* list of cases terminates with a -1 entry.
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*/
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static int* GetTriangleCases(int caseId);
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/**
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* Return the center of the pyramid in parametric coordinates.
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*/
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int GetParametricCenter(double pcoords[3]) override;
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static void InterpolationFunctions(const double pcoords[3], double weights[5]);
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static void InterpolationDerivs(const double pcoords[3], double derivs[15]);
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//@{
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/**
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* Compute the interpolation functions/derivatives
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* (aka shape functions/derivatives)
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*/
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void InterpolateFunctions(const double pcoords[3], double weights[5]) override
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{
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vtkPyramid::InterpolationFunctions(pcoords, weights);
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}
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void InterpolateDerivs(const double pcoords[3], double derivs[15]) override
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{
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vtkPyramid::InterpolationDerivs(pcoords, derivs);
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}
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//@}
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int JacobianInverse(const double pcoords[3], double** inverse, double derivs[15]);
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//@{
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/**
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* Return the ids of the vertices defining edge/face (`edgeId`/`faceId').
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* Ids are related to the cell, not to the dataset.
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*
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* @note The return type changed. It used to be int*, it is now const vtkIdType*.
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* This is so ids are unified between vtkCell and vtkPoints, and so vtkCell ids
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* can be used as inputs in algorithms such as vtkPolygon::ComputeNormal.
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*/
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static const vtkIdType* GetEdgeArray(vtkIdType edgeId) VTK_SIZEHINT(2);
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static const vtkIdType* GetFaceArray(vtkIdType faceId) VTK_SIZEHINT(4);
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//@}
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/**
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* Static method version of GetEdgeToAdjacentFaces.
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*/
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static const vtkIdType* GetEdgeToAdjacentFacesArray(vtkIdType edgeId) VTK_SIZEHINT(2);
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/**
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* Static method version of GetFaceToAdjacentFaces.
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*/
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static const vtkIdType* GetFaceToAdjacentFacesArray(vtkIdType faceId) VTK_SIZEHINT(4);
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/**
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* Static method version of GetPointToIncidentEdgesArray.
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*/
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static const vtkIdType* GetPointToIncidentEdgesArray(vtkIdType pointId) VTK_SIZEHINT(4);
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/**
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* Static method version of GetPointToIncidentFacesArray.
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*/
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static const vtkIdType* GetPointToIncidentFacesArray(vtkIdType pointId) VTK_SIZEHINT(4);
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/**
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* Static method version of GetPointToOneRingPoints.
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*/
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static const vtkIdType* GetPointToOneRingPointsArray(vtkIdType pointId) VTK_SIZEHINT(4);
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/**
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* Static method version of GetCentroid.
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*/
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static bool ComputeCentroid(vtkPoints* points, const vtkIdType* pointIds, double centroid[3]);
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protected:
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vtkPyramid();
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~vtkPyramid() override;
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vtkLine* Line;
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vtkTriangle* Triangle;
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vtkQuad* Quad;
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private:
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vtkPyramid(const vtkPyramid&) = delete;
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void operator=(const vtkPyramid&) = delete;
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};
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//----------------------------------------------------------------------------
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inline int vtkPyramid::GetParametricCenter(double pcoords[3])
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{
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pcoords[0] = pcoords[1] = 0.4;
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pcoords[2] = 0.2;
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return 0;
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}
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#endif
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