/usr/include/paraview/vtkPropPicker.h is in paraview-dev 5.0.1+dfsg1-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80  | /*=========================================================================
  Program:   Visualization Toolkit
  Module:    vtkPropPicker.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 vtkPropPicker - pick an actor/prop using graphics hardware
// .SECTION Description
// vtkPropPicker is used to pick an actor/prop given a selection
// point (in display coordinates) and a renderer. This class uses
// graphics hardware/rendering system to pick rapidly (as compared
// to using ray casting as does vtkCellPicker and vtkPointPicker).
// This class determines the actor/prop and pick position in world
// coordinates; point and cell ids are not determined.
// .SECTION See Also
// vtkPicker vtkWorldPointPicker vtkCellPicker vtkPointPicker
#ifndef vtkPropPicker_h
#define vtkPropPicker_h
#include "vtkRenderingCoreModule.h" // For export macro
#include "vtkAbstractPropPicker.h"
class vtkProp;
class vtkWorldPointPicker;
class VTKRENDERINGCORE_EXPORT vtkPropPicker : public vtkAbstractPropPicker
{
public:
  static vtkPropPicker *New();
  vtkTypeMacro(vtkPropPicker, vtkAbstractPropPicker);
  void PrintSelf(ostream& os, vtkIndent indent);
  // Description:
  // Perform the pick and set the PickedProp ivar. If something is picked, a
  // 1 is returned, otherwise 0 is returned.  Use the GetViewProp() method
  // to get the instance of vtkProp that was picked.  Props are picked from
  // the renderers list of pickable Props.
  int PickProp(double selectionX, double selectionY, vtkRenderer *renderer);
  // Description:
  // Perform a pick from the user-provided list of vtkProps and not from the
  // list of vtkProps that the render maintains.
  int PickProp(double selectionX, double selectionY, vtkRenderer *renderer,
               vtkPropCollection* pickfrom);
  // Description:
  // Overide superclasses' Pick() method.
  int Pick(double selectionX, double selectionY, double selectionZ,
           vtkRenderer *renderer);
  int Pick(double selectionPt[3], vtkRenderer *renderer)
    { return this->Pick( selectionPt[0],
                         selectionPt[1], selectionPt[2], renderer); }
protected:
  vtkPropPicker();
  ~vtkPropPicker();
  void Initialize();
  vtkPropCollection* PickFromProps;
  // Used to get x-y-z pick position
  vtkWorldPointPicker *WorldPointPicker;
private:
  vtkPropPicker(const vtkPropPicker&);  // Not implemented.
  void operator=(const vtkPropPicker&);  // Not implemented.
};
#endif
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