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126 lines
4.8 KiB
126 lines
4.8 KiB
/*=========================================================================
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Program: Visualization Toolkit
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Module: $RCSfile: vtkQuadraticTetra.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 vtkQuadraticTetra - cell represents a parabolic, 10-node isoparametric tetrahedron
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// .SECTION Description
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// vtkQuadraticTetra is a concrete implementation of vtkNonLinearCell to
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// represent a three-dimensional, 10-node, isoparametric parabolic
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// tetrahedron. The interpolation is the standard finite element, quadratic
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// isoparametric shape function. The cell includes a mid-edge node on each of
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// the size edges of the tetrahedron. The ordering of the ten points defining
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// the cell is point ids (0-3,4-9) where ids 0-3 are the four tetra
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// vertices; and point ids 4-9 are the midedge nodes between (0,1), (1,2),
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// (2,0), (0,3), (1,3), and (2,3).
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//
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// .SECTION See Also
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// vtkQuadraticEdge vtkQuadraticTriangle vtkQuadraticWedge
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// vtkQuadraticQuad vtkQuadraticHexahedron vtkQuadraticPyramid
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#ifndef __vtkQuadraticTetra_h
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#define __vtkQuadraticTetra_h
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#include "vtkNonLinearCell.h"
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class vtkPolyData;
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class vtkQuadraticEdge;
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class vtkQuadraticTriangle;
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class vtkTetra;
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class vtkDoubleArray;
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class VTK_FILTERING_EXPORT vtkQuadraticTetra : public vtkNonLinearCell
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{
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public:
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static vtkQuadraticTetra *New();
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vtkTypeRevisionMacro(vtkQuadraticTetra,vtkNonLinearCell);
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void PrintSelf(ostream& os, vtkIndent indent);
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// Description:
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// Implement the vtkCell API. See the vtkCell API for descriptions
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// of these methods.
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int GetCellType() {return VTK_QUADRATIC_TETRA;}
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int GetCellDimension() {return 3;}
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int GetNumberOfEdges() {return 6;}
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int GetNumberOfFaces() {return 4;}
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vtkCell *GetEdge(int);
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vtkCell *GetFace(int);
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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 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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// Clip this edge using scalar value provided. Like contouring, except
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// that it cuts the tetra to produce new tetras.
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void Clip(double value, vtkDataArray *cellScalars,
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vtkPointLocator *locator, vtkCellArray *tetras,
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vtkPointData *inPd, vtkPointData *outPd,
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vtkCellData *inCd, vtkIdType cellId, vtkCellData *outCd,
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int insideOut);
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// Description:
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// Line-edge intersection. Intersection has to occur within [0,1] parametric
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// coordinates and with specified tolerance.
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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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// Description:
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// Return the center of the quadratic tetra in parametric coordinates.
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int GetParametricCenter(double pcoords[3]);
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// Description:
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// Return the distance of the parametric coordinate provided to the
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// cell. If inside the cell, a distance of zero is returned.
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double GetParametricDistance(double pcoords[3]);
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// Description:
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// Quadratic tetra specific methods.
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static void InterpolationFunctions(double pcoords[3], double weights[10]);
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static void InterpolationDerivs(double pcoords[3], double derivs[30]);
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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[30]);
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protected:
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vtkQuadraticTetra();
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~vtkQuadraticTetra();
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vtkQuadraticEdge *Edge;
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vtkQuadraticTriangle *Face;
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vtkTetra *Tetra;
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vtkDoubleArray *Scalars; //used to avoid New/Delete in contouring/clipping
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private:
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vtkQuadraticTetra(const vtkQuadraticTetra&); // Not implemented.
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void operator=(const vtkQuadraticTetra&); // Not implemented.
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};
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#endif
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