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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.
=========================================================================*/
/**
* @class vtkPointPicker
* @brief select a point by shooting a ray into a graphics window
*
*
* 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 origin (i.e., closest to the eye).
*
*
* @sa
* vtkPicker vtkCellPicker
*/
#ifndef vtkPointPicker_h
#define vtkPointPicker_h
#include "vtkPicker.h"
#include "vtkRenderingCoreModule.h" // For export macro
VTK_ABI_NAMESPACE_BEGIN
class vtkDataSet;
class VTKRENDERINGCORE_EXPORT vtkPointPicker : public vtkPicker
{
public:
///@{
/**
* Standard methods for instantiation, type information, and printing.
*/
static vtkPointPicker* New();
vtkTypeMacro(vtkPointPicker, vtkPicker);
void PrintSelf(ostream& os, vtkIndent indent) override;
///@}
///@{
/**
* Get the id of the picked point. If PointId = -1, nothing was picked.
*/
vtkGetMacro(PointId, vtkIdType);
///@}
///@{
/**
* Specify whether the point search should be based on cell points or
* directly on the point list.
*/
vtkSetMacro(UseCells, vtkTypeBool);
vtkGetMacro(UseCells, vtkTypeBool);
vtkBooleanMacro(UseCells, vtkTypeBool);
///@}
protected:
vtkPointPicker();
~vtkPointPicker() override = default;
vtkIdType PointId; // picked point
vtkTypeBool UseCells; // Use cell points vs. points directly
double IntersectWithLine(const double p1[3], const double p2[3], double tol,
vtkAssemblyPath* path, vtkProp3D* p, vtkAbstractMapper3D* m) override;
void Initialize() override;
vtkIdType IntersectDataSetWithLine(const double p1[3], double ray[3], double rayFactor,
double tol, vtkDataSet* dataSet, double& tMin, double minXYZ[3]);
private:
vtkPointPicker(const vtkPointPicker&) = delete;
void operator=(const vtkPointPicker&) = delete;
};
VTK_ABI_NAMESPACE_END
#endif
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