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/*=========================================================================
Program: Visualization Toolkit
Module: $RCSfile: vtkPixel.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 vtkPixel - a cell that represents an orthogonal quadrilateral
// .SECTION Description
// vtkPixel is a concrete implementation of vtkCell to represent a 2D
// orthogonal quadrilateral. Unlike vtkQuad, the corners are at right angles,
// and aligned along x-y-z coordinate axes leading to large increases in
// computational efficiency.
#ifndef __vtkPixel_h
#define __vtkPixel_h
#include "vtkCell.h"
class vtkLine;
class VTK_FILTERING_EXPORT vtkPixel : public vtkCell
{
public:
static vtkPixel *New();
vtkTypeRevisionMacro(vtkPixel,vtkCell);
void PrintSelf(ostream& os, vtkIndent indent);
// Description:
// See the vtkCell API for descriptions of these methods.
int GetCellType() {return VTK_PIXEL;};
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,
vtkPointLocator *locator, vtkCellArray *verts,
vtkCellArray *lines, vtkCellArray *polys,
vtkPointData *inPd, vtkPointData *outPd,
vtkCellData *inCd, vtkIdType cellId, vtkCellData *outCd);
void Clip(double value, vtkDataArray *cellScalars,
vtkPointLocator *locator, vtkCellArray *polys,
vtkPointData *inPd, vtkPointData *outPd,
vtkCellData *inCd, vtkIdType cellId, vtkCellData *outCd,
int insideOut);
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);
// Description:
// Return the center of the triangle in parametric coordinates.
int GetParametricCenter(double pcoords[3]);
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:
// Pixel specific methods.
static void InterpolationFunctions(double pcoords[3], double weights[4]);
static void InterpolationDerivs(double pcoords[3], double derivs[8]);
protected:
vtkPixel();
~vtkPixel();
vtkLine *Line;
private:
vtkPixel(const vtkPixel&); // Not implemented.
void operator=(const vtkPixel&); // Not implemented.
};
//----------------------------------------------------------------------------
inline int vtkPixel::GetParametricCenter(double pcoords[3])
{
pcoords[0] = pcoords[1] = 0.5;
pcoords[2] = 0.0;
return 0;
}
#endif
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