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101 lines
3.7 KiB
101 lines
3.7 KiB
/*=========================================================================
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Program: Visualization Toolkit
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Module: $RCSfile: vtkHexahedron.h,v $
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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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// .NAME vtkHexahedron - a cell that represents a linear 3D hexahedron
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// .SECTION Description
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// vtkHexahedron is a concrete implementation of vtkCell to represent a
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// linear, 3D rectangular hexahedron (e.g., "brick" topology). vtkHexahedron
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// uses the standard isoparametric shape functions for a linear
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// hexahedron. The hexahedron is defined by the eight points (0-7) where
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// (0,1,2,3) is the base of the hexahedron 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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// opposite face (4,5,6,7).
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// .SECTION See Also
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// vtkConvexPointSet vtkPyramid vtkTetra vtkVoxel vtkWedge
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#ifndef __vtkHexahedron_h
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#define __vtkHexahedron_h
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#include "vtkCell3D.h"
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class vtkLine;
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class vtkQuad;
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class VTK_FILTERING_EXPORT vtkHexahedron : public vtkCell3D
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{
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public:
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static vtkHexahedron *New();
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vtkTypeRevisionMacro(vtkHexahedron,vtkCell3D);
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void PrintSelf(ostream& os, vtkIndent indent);
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// Description:
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// See vtkCell3D API for description of these methods.
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virtual void GetEdgePoints(int edgeId, int* &pts);
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virtual void GetFacePoints(int faceId, int* &pts);
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// Description:
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// See the vtkCell API for descriptions of these methods.
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int GetCellType() {return VTK_HEXAHEDRON;}
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int GetNumberOfEdges() {return 12;}
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int GetNumberOfFaces() {return 6;}
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vtkCell *GetEdge(int edgeId);
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vtkCell *GetFace(int faceId);
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int CellBoundary(int subId, double pcoords[3], vtkIdList *pts);
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void Contour(double value, vtkDataArray *cellScalars,
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vtkPointLocator *locator, vtkCellArray *verts,
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vtkCellArray *lines, vtkCellArray *polys,
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vtkPointData *inPd, vtkPointData *outPd,
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vtkCellData *inCd, vtkIdType cellId, vtkCellData *outCd);
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int EvaluatePosition(double x[3], double* closestPoint,
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int& subId, double pcoords[3],
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double& dist2, double *weights);
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void EvaluateLocation(int& subId, double pcoords[3], double x[3],
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double *weights);
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int IntersectWithLine(double p1[3], double p2[3], double tol, double& t,
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double x[3], double pcoords[3], int& subId);
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int Triangulate(int index, vtkIdList *ptIds, vtkPoints *pts);
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void Derivatives(int subId, double pcoords[3], double *values,
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int dim, double *derivs);
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virtual double *GetParametricCoords();
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// Description:
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// Hexahedron specific.
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static void InterpolationFunctions(double pcoords[3], double weights[8]);
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static void InterpolationDerivs(double pcoords[3], double derivs[24]);
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static int *GetEdgeArray(int edgeId);
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static int *GetFaceArray(int faceId);
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// Description:
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// Given parametric coordinates compute inverse Jacobian transformation
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// matrix. Returns 9 elements of 3x3 inverse Jacobian plus interpolation
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// function derivatives.
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void JacobianInverse(double pcoords[3], double **inverse, double derivs[24]);
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protected:
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vtkHexahedron();
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~vtkHexahedron();
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vtkLine *Line;
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vtkQuad *Quad;
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private:
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vtkHexahedron(const vtkHexahedron&); // Not implemented.
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void operator=(const vtkHexahedron&); // Not implemented.
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};
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#endif
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