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Program: Visualization Toolkit
Module: vtkQuadraticLinearQuad.h
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or for details.
This software is distributed WITHOUT ANY WARRANTY; without even
PURPOSE. See the above copyright notice for more information.
// .NAME vtkQuadraticLinearQuad - cell represents a quadratic-linear, 6-node isoparametric quad
// .SECTION Description
// vtkQuadraticQuad is a concrete implementation of vtkNonLinearCell to
// represent a two-dimensional, 6-node isoparametric quadratic-linear quadrilateral
// element. The interpolation is the standard finite element, quadratic-linear
// isoparametric shape function. The cell includes a mid-edge node for two
// of the four edges. The ordering of the six points defining
// the cell are point ids (0-3,4-5) where ids 0-3 define the four corner
// vertices of the quad; ids 4-7 define the midedge nodes (0,1) and (2,3) .
// .SECTION See Also
// vtkQuadraticEdge vtkQuadraticTriangle vtkQuadraticTetra vtkQuadraticQuad
// vtkQuadraticHexahedron vtkQuadraticWedge vtkQuadraticPyramid
// .SECTION Thanks
// Thanks to Soeren Gebbert who developed this class and
// integrated it into VTK 5.0.
#ifndef __vtkQuadraticLinearQuad_h
#define __vtkQuadraticLinearQuad_h
#include "vtkNonLinearCell.h"
class vtkQuadraticEdge;
class vtkLine;
class vtkQuad;
class vtkDoubleArray;
class VTK_FILTERING_EXPORT vtkQuadraticLinearQuad : public vtkNonLinearCell
static vtkQuadraticLinearQuad *New();
vtkTypeMacro(vtkQuadraticLinearQuad, vtkNonLinearCell);
void PrintSelf(ostream & os, vtkIndent indent);
// Description:
// Implement the vtkCell API. See the vtkCell API for descriptions
// of these methods.
int GetCellType () { return VTK_QUADRATIC_LINEAR_QUAD; };
int GetCellDimension () { return 2; }
int GetNumberOfEdges () { return 4; }
int GetNumberOfFaces () { return 0; }
vtkCell *GetEdge (int);
vtkCell *GetFace (int) { return 0; }
int CellBoundary (int subId, double pcoords[3], vtkIdList * pts);
void Contour (double value, vtkDataArray * cellScalars,
vtkIncrementalPointLocator * locator, vtkCellArray * verts,
vtkCellArray * lines, vtkCellArray * polys,
vtkPointData * inPd, vtkPointData * outPd, vtkCellData * inCd,
vtkIdType cellId, vtkCellData * outCd);
int EvaluatePosition (double x[3], double *closestPoint,
int &subId, double pcoords[3], double &dist2, double *weights);
void EvaluateLocation (int &subId, double pcoords[3], double x[3],
double *weights);
int Triangulate (int index, vtkIdList * ptIds, vtkPoints * pts);
void Derivatives (int subId, double pcoords[3], double *values, int dim,
double *derivs);
virtual double *GetParametricCoords ();
// Description:
// Clip this quadratic linear quad using scalar value provided. Like
// contouring, except that it cuts the quad to produce linear triangles.
void Clip (double value, vtkDataArray * cellScalars,
vtkIncrementalPointLocator * locator, vtkCellArray * polys,
vtkPointData * inPd, vtkPointData * outPd,
vtkCellData * inCd, vtkIdType cellId, vtkCellData * outCd,
int insideOut);
// Description:
// Line-edge intersection. Intersection has to occur within [0,1] parametric
// coordinates and with specified tolerance.
int IntersectWithLine (double p1[3], double p2[3], double tol, double &t,
double x[3], double pcoords[3], int &subId);
// Description:
// Return the center of the pyramid in parametric coordinates.
int GetParametricCenter(double pcoords[3]);
// Description:
// @deprecated Replaced by vtkQuadraticLinearQuad::InterpolateFunctions as of VTK 5.2
static void InterpolationFunctions (double pcoords[3], double weights[6]);
// Description:
// @deprecated Replaced by vtkQuadraticLinearQuad::InterpolateDerivs as of VTK 5.2
static void InterpolationDerivs (double pcoords[3], double derivs[12]);
// Description:
// Compute the interpolation functions/derivatives
// (aka shape functions/derivatives)
virtual void InterpolateFunctions (double pcoords[3], double weights[6])
virtual void InterpolateDerivs (double pcoords[3], double derivs[12])
// Description:
// Return the ids of the vertices defining edge (`edgeId`).
// Ids are related to the cell, not to the dataset.
static int *GetEdgeArray(int edgeId);
vtkQuadraticLinearQuad ();
~vtkQuadraticLinearQuad ();
vtkQuadraticEdge *Edge;
vtkLine *LinEdge;
vtkQuad *Quad;
vtkDoubleArray *Scalars;
vtkQuadraticLinearQuad (const vtkQuadraticLinearQuad &); // Not implemented.
void operator = (const vtkQuadraticLinearQuad &); // Not implemented.
inline int vtkQuadraticLinearQuad::GetParametricCenter(double pcoords[3])
pcoords[0] = pcoords[1] = 0.5;
pcoords[2] = 0.;
return 0;