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/*=========================================================================
Program: Visualization Toolkit
Module: vtkPointPicker.h
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 vtkPointPicker - select a point by shooting a ray into a graphics window
// .SECTION Description
// vtkPointPicker is used to select a point by shooting a ray into a graphics
// window and intersecting with actor's defining geometry - specifically its
// points. Beside returning coordinates, actor, and mapper, vtkPointPicker
// returns the id of the point projecting closest onto the ray (within the
// specified tolerance). Ties are broken (i.e., multiple points all
// projecting within the tolerance along the pick ray) by choosing the point
// closest to the ray.
//
// .SECTION See Also
// vtkPicker vtkCellPicker.
#ifndef vtkPointPicker_h
#define vtkPointPicker_h
#include "vtkRenderingCoreModule.h" // For export macro
#include "vtkPicker.h"
class VTKRENDERINGCORE_EXPORT vtkPointPicker : public vtkPicker
{
public:
static vtkPointPicker *New();
vtkTypeMacro(vtkPointPicker,vtkPicker);
void PrintSelf(ostream& os, vtkIndent indent);
// Description:
// Get the id of the picked point. If PointId = -1, nothing was picked.
vtkGetMacro(PointId, vtkIdType);
// Description:
// Specify whether the point search should be based on cell points or
// directly on the point list.
vtkSetMacro(UseCells, int);
vtkGetMacro(UseCells, int);
vtkBooleanMacro(UseCells, int);
protected:
vtkPointPicker();
~vtkPointPicker() {}
vtkIdType PointId; //picked point
int UseCells; // Use cell points vs. points directly
double IntersectWithLine(double p1[3], double p2[3], double tol,
vtkAssemblyPath *path, vtkProp3D *p,
vtkAbstractMapper3D *m);
void Initialize();
private:
vtkPointPicker(const vtkPointPicker&); // Not implemented.
void operator=(const vtkPointPicker&); // Not implemented.
};
#endif
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