vtkAbstractPicker.h

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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
 
#ifndef vtkAbstractPicker_h
#define vtkAbstractPicker_h
 
#include "vtkObject.h"
#include "vtkRenderingCoreModule.h" // For export macro
#include "vtkWrappingHints.h"       // For VTK_MARSHALAUTO
 
VTK_ABI_NAMESPACE_BEGIN
class vtkRenderer;
class vtkProp;
class vtkPropCollection;
 
class VTKRENDERINGCORE_EXPORT VTK_MARSHALAUTO vtkAbstractPicker : public vtkObject
{
public:
  vtkTypeMacro(vtkAbstractPicker, vtkObject);
  void PrintSelf(ostream& os, vtkIndent indent) override;


  vtkGetObjectMacro(Renderer, vtkRenderer);


  vtkGetVectorMacro(SelectionPoint, double, 3);


  vtkGetVectorMacro(PickPosition, double, 3);

  virtual int Pick(
    double selectionX, double selectionY, double selectionZ, vtkRenderer* renderer) = 0;

  int Pick(double selectionPt[3], vtkRenderer* ren)
  {
    return this->Pick(selectionPt[0], selectionPt[1], selectionPt[2], ren);
  }

  virtual int Pick3DPoint(double /* selectionPt */[3], vtkRenderer* /*ren*/)
  {
    vtkErrorMacro("Pick3DPoint called without implementation");
    return 0;
  }

  virtual int Pick3DRay(double /* selectionPt */[3], double /* orient */[4], vtkRenderer* /*ren*/)
  {
    vtkErrorMacro("Pick3DRay called without implementation");
    return 0;
  }


  vtkSetMacro(PickFromList, vtkTypeBool);
  vtkGetMacro(PickFromList, vtkTypeBool);
  vtkBooleanMacro(PickFromList, vtkTypeBool);

  void InitializePickList();

  void AddPickList(vtkProp*);

  void DeletePickList(vtkProp*);

  vtkPropCollection* GetPickList() { return this->PickList; }
 
protected:
  vtkAbstractPicker();
  ~vtkAbstractPicker() override;
 
  virtual void Initialize();
 
  vtkRenderer* Renderer;    // pick occurred in this renderer's viewport
  double SelectionPoint[3]; // selection point in window (pixel) coordinates
  double PickPosition[3];   // selection point in world coordinates
 
  // use the following to control picking from a list
  vtkTypeBool PickFromList;
  vtkPropCollection* PickList;
 
private:
  vtkAbstractPicker(const vtkAbstractPicker&) = delete;
  void operator=(const vtkAbstractPicker&) = delete;
};
 
VTK_ABI_NAMESPACE_END
#endif