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87 lines
2.7 KiB
C++
87 lines
2.7 KiB
C++
/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkPointPicker.h
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Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
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All rights reserved.
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See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
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This software is distributed WITHOUT ANY WARRANTY; without even
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the above copyright notice for more information.
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=========================================================================*/
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/**
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* @class vtkPointPicker
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* @brief select a point by shooting a ray into a graphics window
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*
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*
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* vtkPointPicker is used to select a point by shooting a ray into a graphics
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* window and intersecting with actor's defining geometry - specifically its
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* points. Beside returning coordinates, actor, and mapper, vtkPointPicker
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* returns the id of the point projecting closest onto the ray (within the
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* specified tolerance). Ties are broken (i.e., multiple points all
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* projecting within the tolerance along the pick ray) by choosing the point
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* closest to the ray.
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*
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*
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* @sa
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* vtkPicker vtkCellPicker.
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*/
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#ifndef vtkPointPicker_h
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#define vtkPointPicker_h
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#include "vtkPicker.h"
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#include "vtkRenderingCoreModule.h" // For export macro
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class vtkDataSet;
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class VTKRENDERINGCORE_EXPORT vtkPointPicker : public vtkPicker
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{
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public:
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static vtkPointPicker* New();
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vtkTypeMacro(vtkPointPicker, vtkPicker);
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void PrintSelf(ostream& os, vtkIndent indent) override;
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//@{
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/**
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* Get the id of the picked point. If PointId = -1, nothing was picked.
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*/
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vtkGetMacro(PointId, vtkIdType);
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//@}
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//@{
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/**
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* Specify whether the point search should be based on cell points or
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* directly on the point list.
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*/
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vtkSetMacro(UseCells, vtkTypeBool);
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vtkGetMacro(UseCells, vtkTypeBool);
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vtkBooleanMacro(UseCells, vtkTypeBool);
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//@}
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protected:
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vtkPointPicker();
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~vtkPointPicker() override {}
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vtkIdType PointId; // picked point
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vtkTypeBool UseCells; // Use cell points vs. points directly
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double IntersectWithLine(const double p1[3], const double p2[3], double tol,
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vtkAssemblyPath* path, vtkProp3D* p, vtkAbstractMapper3D* m) override;
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void Initialize() override;
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vtkIdType IntersectDataSetWithLine(const double p1[3], double ray[3], double rayFactor,
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double tol, vtkDataSet* dataSet, double& tMin, double minXYZ[3]);
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bool UpdateClosestPoint(double x[3], const double p1[3], double ray[3], double rayFactor,
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double tol, double& tMin, double& distMin);
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private:
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vtkPointPicker(const vtkPointPicker&) = delete;
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void operator=(const vtkPointPicker&) = delete;
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};
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#endif
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