dox/Widgets/vtkBoxRepresentation.h

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

  Program:   Visualization Toolkit
  Module:    vtkBoxRepresentation.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 __vtkBoxRepresentation_h
#define __vtkBoxRepresentation_h

#include "vtkWidgetRepresentation.h"

class vtkActor;
class vtkPolyDataMapper;
class vtkLineSource;
class vtkSphereSource;
class vtkCellPicker;
class vtkProperty;
class vtkPolyData;
class vtkPoints;
class vtkPolyDataAlgorithm;
class vtkPointHandleRepresentation3D;
class vtkTransform;
class vtkPlanes;
class vtkBox;
class vtkDoubleArray;
class vtkMatrix4x4;


class VTK_WIDGETS_EXPORT vtkBoxRepresentation : public vtkWidgetRepresentation
{
public:
  static vtkBoxRepresentation *New();


  vtkTypeMacro(vtkBoxRepresentation,vtkWidgetRepresentation);
  void PrintSelf(ostream& os, vtkIndent indent);

  void GetPlanes(vtkPlanes *planes);


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

  virtual void GetTransform(vtkTransform *t);

  virtual void SetTransform(vtkTransform* t);

  void GetPolyData(vtkPolyData *pd);


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


  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);}


  virtual void HandlesOn();
  virtual void HandlesOff();
  

  virtual void PlaceWidget(double bounds[6]);
  virtual void BuildRepresentation();
  virtual int  ComputeInteractionState(int X, int Y, int modify=0);
  virtual void StartWidgetInteraction(double e[2]);
  virtual void WidgetInteraction(double e[2]);
  virtual double *GetBounds();
  

  virtual void ReleaseGraphicsResources(vtkWindow*);
  virtual int  RenderOpaqueGeometry(vtkViewport*);
  virtual int  RenderTranslucentPolygonalGeometry(vtkViewport*);
  virtual int  HasTranslucentPolygonalGeometry();
  
//BTX - used to manage the state of the widget
  enum {Outside=0,MoveF0,MoveF1,MoveF2,MoveF3,MoveF4,MoveF5,Translating,Rotating,Scaling};
//ETX

  void SetInteractionState(int state);

protected:
  vtkBoxRepresentation();
  ~vtkBoxRepresentation();

  // Manage how the representation appears
  double LastEventPosition[3];
  
  // 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);
  virtual void ComputeNormals();
  virtual void SizeHandles();
  
  // wireframe outline
  vtkActor          *HexOutline;
  vtkPolyDataMapper *OutlineMapper;
  vtkPolyData       *OutlinePolyData;

  // Do the picking
  vtkCellPicker *HandlePicker;
  vtkCellPicker *HexPicker;
  vtkActor *CurrentHandle;
  int      CurrentHexFace;
  vtkCellPicker *LastPicker;
  
  // Transform the hexahedral points (used for rotations)
  vtkTransform *Transform;
  
  // Support GetBounds() method
  vtkBox *BoundingBox;
  
  // 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;
  virtual void CreateDefaultProperties();
  
  // Control the orientation of the normals
  int InsideOut;
  int OutlineFaceWires;
  int OutlineCursorWires;
  void GenerateOutline();
  
  // Helper methods
  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);

  // Internal ivars for performance
  vtkPoints      *PlanePoints;
  vtkDoubleArray *PlaneNormals;
  vtkMatrix4x4   *Matrix;

  //"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]);


private:
  vtkBoxRepresentation(const vtkBoxRepresentation&);  //Not implemented
  void operator=(const vtkBoxRepresentation&);  //Not implemented
};

#endif

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