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/*=========================================================================
Program: Visualization Toolkit
Module: $RCSfile: vtkQuadraticEdge.h,v $
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
// .NAME vtkQuadraticEdge - cell represents a parabolic, isoparametric edge
// .SECTION Description
// vtkQuadraticEdge is a concrete implementation of vtkNonLinearCell to
// represent a one-dimensional, 3-nodes, isoparametric parabolic line. The
// interpolation is the standard finite element, quadratic isoparametric
// shape function. The cell includes a mid-edge node. The ordering of the
// three points defining the cell is point ids (0,1,2) where id #2 is the
// midedge node.
// .SECTION See Also
// vtkQuadraticTriangle vtkQuadraticTetra vtkQuadraticWedge
// vtkQuadraticQuad vtkQuadraticHexahedron vtkQuadraticPyramid
#ifndef __vtkQuadraticEdge_h
#define __vtkQuadraticEdge_h
#include "vtkNonLinearCell.h"
class vtkLine;
class VTK_FILTERING_EXPORT vtkQuadraticEdge : public vtkNonLinearCell
{
public:
static vtkQuadraticEdge *New();
vtkTypeRevisionMacro(vtkQuadraticEdge,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_EDGE;};
int GetCellDimension() {return 1;}
int GetNumberOfEdges() {return 0;}
int GetNumberOfFaces() {return 0;}
vtkCell *GetEdge(int) {return 0;}
vtkCell *GetFace(int) {return 0;}
int CellBoundary(int subId, double pcoords[3], vtkIdList *pts);
void Contour(double value, vtkDataArray *cellScalars,
vtkPointLocator *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 edge using scalar value provided. Like contouring, except
// that it cuts the edge to produce linear line segments.
void Clip(double value, vtkDataArray *cellScalars,
vtkPointLocator *locator, vtkCellArray *lines,
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 quadratic tetra in parametric coordinates.
int GetParametricCenter(double pcoords[3]);
// Description:
// Quadratic edge specific methods.
static void InterpolationFunctions(double pcoords[3], double weights[3]);
static void InterpolationDerivs(double pcoords[3], double derivs[3]);
protected:
vtkQuadraticEdge();
~vtkQuadraticEdge();
vtkLine *Line;
vtkDoubleArray *Scalars; //used to avoid New/Delete in contouring/clipping
private:
vtkQuadraticEdge(const vtkQuadraticEdge&); // Not implemented.
void operator=(const vtkQuadraticEdge&); // Not implemented.
};
//----------------------------------------------------------------------------
inline int vtkQuadraticEdge::GetParametricCenter(double pcoords[3])
{
pcoords[0] = 0.5;
pcoords[1] = pcoords[2] = 0.;
return 0;
}
#endif
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