vtkBoxWidget.h

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

  Program:   Visualization Toolkit
  Module:    vtkBoxWidget.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 vtkBoxWidget_h
#define vtkBoxWidget_h

#include "vtk3DWidget.h"
#include "vtkInteractionWidgetsModule.h" // For export macro

class vtkActor;
class vtkCellPicker;
class vtkPlanes;
class vtkPoints;
class vtkPolyData;
class vtkPolyDataMapper;
class vtkProp;
class vtkProperty;
class vtkSphereSource;
class vtkTransform;

class VTKINTERACTIONWIDGETS_EXPORT vtkBoxWidget : public vtk3DWidget
{
public:
  static vtkBoxWidget* New();

  vtkTypeMacro(vtkBoxWidget, vtk3DWidget);
  void PrintSelf(ostream& os, vtkIndent indent) override;


  void SetEnabled(int) override;
  void PlaceWidget(double bounds[6]) override;
  void PlaceWidget() override { this->Superclass::PlaceWidget(); }
  void PlaceWidget(
    double xmin, double xmax, double ymin, double ymax, double zmin, double zmax) override
  {
    this->Superclass::PlaceWidget(xmin, xmax, ymin, ymax, zmin, zmax);
  }

  void GetPlanes(vtkPlanes* planes);


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

  virtual void GetTransform(vtkTransform* t);

  virtual void SetTransform(vtkTransform* t);

  void GetPolyData(vtkPolyData* pd);


  vtkGetObjectMacro(HandleProperty, vtkProperty);
  vtkGetObjectMacro(SelectedHandleProperty, vtkProperty);


  void HandlesOn();
  void HandlesOff();


  vtkGetObjectMacro(FaceProperty, vtkProperty);
  vtkGetObjectMacro(SelectedFaceProperty, vtkProperty);


  vtkGetObjectMacro(OutlineProperty, vtkProperty);
  vtkGetObjectMacro(SelectedOutlineProperty, vtkProperty);


  void SetOutlineFaceWires(int);
  vtkGetMacro(OutlineFaceWires, int);
  void OutlineFaceWiresOn() { this->SetOutlineFaceWires(1); }
  void OutlineFaceWiresOff() { this->SetOutlineFaceWires(0); }


  void SetOutlineCursorWires(int);
  vtkGetMacro(OutlineCursorWires, int);
  void OutlineCursorWiresOn() { this->SetOutlineCursorWires(1); }
  void OutlineCursorWiresOff() { this->SetOutlineCursorWires(0); }


  vtkSetMacro(TranslationEnabled, vtkTypeBool);
  vtkGetMacro(TranslationEnabled, vtkTypeBool);
  vtkBooleanMacro(TranslationEnabled, vtkTypeBool);
  vtkSetMacro(ScalingEnabled, vtkTypeBool);
  vtkGetMacro(ScalingEnabled, vtkTypeBool);
  vtkBooleanMacro(ScalingEnabled, vtkTypeBool);
  vtkSetMacro(RotationEnabled, vtkTypeBool);
  vtkGetMacro(RotationEnabled, vtkTypeBool);
  vtkBooleanMacro(RotationEnabled, vtkTypeBool);

protected:
  vtkBoxWidget();
  ~vtkBoxWidget() override;

  // Manage the state of the widget
  int State;
  enum WidgetState
  {
    Start = 0,
    Moving,
    Scaling,
    Outside
  };

  // Handles the events
  static void ProcessEvents(
    vtkObject* object, unsigned long event, void* clientdata, void* calldata);

  // ProcessEvents() dispatches to these methods.
  virtual void OnMouseMove();
  virtual void OnLeftButtonDown();
  virtual void OnLeftButtonUp();
  virtual void OnMiddleButtonDown();
  virtual void OnMiddleButtonUp();
  virtual void OnRightButtonDown();
  virtual void OnRightButtonUp();

  // the hexahedron (6 faces)
  vtkActor* HexActor;
  vtkPolyDataMapper* HexMapper;
  vtkPolyData* HexPolyData;
  vtkPoints* Points; // used by others as well
  double N[6][3];    // the normals of the faces

  // A face of the hexahedron
  vtkActor* HexFace;
  vtkPolyDataMapper* HexFaceMapper;
  vtkPolyData* HexFacePolyData;

  // glyphs representing hot spots (e.g., handles)
  vtkActor** Handle;
  vtkPolyDataMapper** HandleMapper;
  vtkSphereSource** HandleGeometry;
  virtual void PositionHandles();
  int HighlightHandle(vtkProp* prop); // returns cell id
  void HighlightFace(int cellId);
  void HighlightOutline(int highlight);
  void ComputeNormals();
  void SizeHandles() override;

  // wireframe outline
  vtkActor* HexOutline;
  vtkPolyDataMapper* OutlineMapper;
  vtkPolyData* OutlinePolyData;

  // Do the picking
  vtkCellPicker* HandlePicker;
  vtkCellPicker* HexPicker;
  vtkActor* CurrentHandle;
  int CurrentHexFace;

  // Register internal Pickers within PickingManager
  void RegisterPickers() override;

  // Methods to manipulate the hexahedron.
  virtual void Translate(double* p1, double* p2);
  virtual void Scale(double* p1, double* p2, int X, int Y);
  virtual void Rotate(int X, int Y, double* p1, double* p2, double* vpn);
  void MovePlusXFace(double* p1, double* p2);
  void MoveMinusXFace(double* p1, double* p2);
  void MovePlusYFace(double* p1, double* p2);
  void MoveMinusYFace(double* p1, double* p2);
  void MovePlusZFace(double* p1, double* p2);
  void MoveMinusZFace(double* p1, double* p2);

  //"dir" is the direction in which the face can be moved i.e. the axis passing
  // through the center
  void MoveFace(double* p1, double* p2, double* dir, double* x1, double* x2, double* x3, double* x4,
    double* x5);
  // Helper method to obtain the direction in which the face is to be moved.
  // Handles special cases where some of the scale factors are 0.
  void GetDirection(const double Nx[3], const double Ny[3], const double Nz[3], double dir[3]);

  // Transform the hexahedral points (used for rotations)
  vtkTransform* Transform;

  // Properties used to control the appearance of selected objects and
  // the manipulator in general.
  vtkProperty* HandleProperty;
  vtkProperty* SelectedHandleProperty;
  vtkProperty* FaceProperty;
  vtkProperty* SelectedFaceProperty;
  vtkProperty* OutlineProperty;
  vtkProperty* SelectedOutlineProperty;
  void CreateDefaultProperties();

  // Control the orientation of the normals
  vtkTypeBool InsideOut;
  int OutlineFaceWires;
  int OutlineCursorWires;
  void GenerateOutline();

  // Control whether scaling, rotation, and translation are supported
  vtkTypeBool TranslationEnabled;
  vtkTypeBool ScalingEnabled;
  vtkTypeBool RotationEnabled;

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

#endif