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Program: Visualization Toolkit
Module: vtkQuad.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 vtkQuad - a cell that represents a 2D quadrilateral
// .SECTION Description
// vtkQuad is a concrete implementation of vtkCell to represent a 2D
// quadrilateral. vtkQuad is defined by the four points (0,1,2,3) in
// counterclockwise order. vtkQuad uses the standard isoparametric
// interpolation functions for a linear quadrilateral.
#ifndef __vtkQuad_h
#define __vtkQuad_h
#include "vtkCell.h"
class vtkLine;
class vtkTriangle;
class vtkIncrementalPointLocator;
class VTK_FILTERING_EXPORT vtkQuad : public vtkCell
static vtkQuad *New();
void PrintSelf(ostream& os, vtkIndent indent);
// Description:
// See the vtkCell API for descriptions of these methods.
int GetCellType() {return VTK_QUAD;};
int GetCellDimension() {return 2;};
int GetNumberOfEdges() {return 4;};
int GetNumberOfFaces() {return 0;};
vtkCell *GetEdge(int edgeId);
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 IntersectWithLine(double p1[3], double p2[3], double tol, double& t,
double x[3], double pcoords[3], int& subId);
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:
// Return the center of the triangle in parametric coordinates.
int GetParametricCenter(double pcoords[3]);
// Description:
// Clip this quad using scalar value provided. Like contouring, except
// that it cuts the quad to produce other quads and/or triangles.
void Clip(double value, vtkDataArray *cellScalars,
vtkIncrementalPointLocator *locator, vtkCellArray *polys,
vtkPointData *inPd, vtkPointData *outPd,
vtkCellData *inCd, vtkIdType cellId, vtkCellData *outCd,
int insideOut);
// Description:
// @deprecated Replaced by vtkQuad::InterpolateFunctions as of VTK 5.2
static void InterpolationFunctions(double pcoords[3], double sf[4]);
// Description:
// @deprecated Replaced by vtkQuad::InterpolateDerivs as of VTK 5.2
static void InterpolationDerivs(double pcoords[3], double derivs[8]);
// Description:
// Compute the interpolation functions/derivatives
// (aka shape functions/derivatives)
virtual void InterpolateFunctions(double pcoords[3], double sf[4])
virtual void InterpolateDerivs(double pcoords[3], double derivs[8])
// Description:
// Return the ids of the vertices defining edge (`edgeId`).
// Ids are related to the cell, not to the dataset.
int *GetEdgeArray(int edgeId);
vtkLine *Line;
vtkTriangle *Triangle;
vtkQuad(const vtkQuad&); // Not implemented.
void operator=(const vtkQuad&); // Not implemented.
inline int vtkQuad::GetParametricCenter(double pcoords[3])
pcoords[0] = pcoords[1] = 0.5;
pcoords[2] = 0.0;
return 0;