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/*=========================================================================
Program: Visualization Toolkit
Module: $RCSfile: vtkCellPicker.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 vtkCellPicker - select a cell by shooting a ray into graphics window
// .SECTION Description
// vtkCellPicker is used to select a cell by shooting a ray into graphics
// window and intersecting with actor's defining geometry - specifically
// its cells. Beside returning coordinates, actor and mapper, vtkCellPicker
// returns the id of the closest cell within the tolerance along the pick
// ray, and the dataset that was picked.
// .SECTION See Also
// vtkPicker vtkPointPicker
#ifndef __vtkCellPicker_h
#define __vtkCellPicker_h
#include "vtkPicker.h"
class vtkGenericCell;
class VTK_RENDERING_EXPORT vtkCellPicker : public vtkPicker
{
public:
static vtkCellPicker *New();
vtkTypeRevisionMacro(vtkCellPicker,vtkPicker);
void PrintSelf(ostream& os, vtkIndent indent);
// Description:
// Get the id of the picked cell. If CellId = -1, nothing was picked.
vtkGetMacro(CellId, vtkIdType);
// Description:
// Get the subId of the picked cell. If SubId = -1, nothing was picked.
vtkGetMacro(SubId, int);
// Description:
// Get the parametric coordinates of the picked cell. Only valid if
// pick was made.
vtkGetVectorMacro(PCoords, double,3);
protected:
vtkCellPicker();
~vtkCellPicker();
vtkIdType CellId; // picked cell
int SubId; // picked cell subId
double PCoords[3]; // picked cell parametric coordinates
virtual double IntersectWithLine(double p1[3], double p2[3], double tol,
vtkAssemblyPath *path, vtkProp3D *p,
vtkAbstractMapper3D *m);
void Initialize();
private:
vtkGenericCell *Cell; //used to accelerate picking
private:
vtkCellPicker(const vtkCellPicker&); // Not implemented.
void operator=(const vtkCellPicker&); // Not implemented.
};
#endif
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