vtkAreaPicker.h

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/*=========================================================================

  Program:   Visualization Toolkit
  Module:    vtkAreaPicker.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.

=========================================================================*/
#ifndef vtkAreaPicker_h
#define vtkAreaPicker_h

#include "vtkAbstractPropPicker.h"
#include "vtkRenderingCoreModule.h" // For export macro

class vtkRenderer;
class vtkPoints;
class vtkPlanes;
class vtkProp3DCollection;
class vtkAbstractMapper3D;
class vtkDataSet;
class vtkExtractSelectedFrustum;
class vtkProp;

class VTKRENDERINGCORE_EXPORT vtkAreaPicker : public vtkAbstractPropPicker
{
public:
  static vtkAreaPicker* New();
  vtkTypeMacro(vtkAreaPicker, vtkAbstractPropPicker);
  void PrintSelf(ostream& os, vtkIndent indent) override;

  void SetPickCoords(double x0, double y0, double x1, double y1);

  void SetRenderer(vtkRenderer*);

  virtual int Pick();

  virtual int AreaPick(double x0, double y0, double x1, double y1, vtkRenderer* renderer = nullptr);

  int Pick(double x0, double y0, double vtkNotUsed(z0), vtkRenderer* renderer = nullptr) override
  {
    return this->AreaPick(x0, y0, x0 + 1.0, y0 + 1.0, renderer);
  }


  vtkGetObjectMacro(Mapper, vtkAbstractMapper3D);


  vtkGetObjectMacro(DataSet, vtkDataSet);

  vtkProp3DCollection* GetProp3Ds() { return this->Prop3Ds; }


  vtkGetObjectMacro(Frustum, vtkPlanes);


  vtkGetObjectMacro(ClipPoints, vtkPoints);

protected:
  vtkAreaPicker();
  ~vtkAreaPicker() override;

  void Initialize() override;
  void DefineFrustum(double x0, double y0, double x1, double y1, vtkRenderer*);
  virtual int PickProps(vtkRenderer* renderer);
  int TypeDecipher(vtkProp*, vtkAbstractMapper3D**);

  int ABoxFrustumIsect(double bounds[], double& mindist);

  vtkPoints* ClipPoints;
  vtkPlanes* Frustum;

  vtkProp3DCollection* Prop3Ds; // candidate actors (based on bounding box)
  vtkAbstractMapper3D* Mapper;  // selected mapper (if the prop has a mapper)
  vtkDataSet* DataSet;          // selected dataset (if there is one)

  // used internally to do prop intersection tests
  vtkExtractSelectedFrustum* FrustumExtractor;

  double X0;
  double Y0;
  double X1;
  double Y1;

private:
  vtkAreaPicker(const vtkAreaPicker&) = delete;
  void operator=(const vtkAreaPicker&) = delete;
};

#endif