vtkProp3DAxisFollower.h

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

  Program:   Visualization Toolkit
  Module:    vtkProp3DAxisFollower.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 vtkProp3DAxisFollower_h
#define vtkProp3DAxisFollower_h

#include "vtkRenderingAnnotationModule.h" // For export macro
#include "vtkProp3DFollower.h"
#include "vtkWeakPointer.h" // For vtkWeakPointer

class vtkAxisActor;
class vtkViewport;

class VTKRENDERINGANNOTATION_EXPORT vtkProp3DAxisFollower
  : public vtkProp3DFollower
{
 public:
  static vtkProp3DAxisFollower *New();


  vtkTypeMacro(vtkProp3DAxisFollower,vtkProp3DFollower);
  void PrintSelf(ostream& os, vtkIndent indent) override;


 virtual void SetAxis(vtkAxisActor*);
 virtual vtkAxisActor* GetAxis();


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


 vtkSetMacro(EnableDistanceLOD, int);
 vtkGetMacro(EnableDistanceLOD, int);


 vtkSetClampMacro(DistanceLODThreshold, double, 0.0, 1.0);
 vtkGetMacro(DistanceLODThreshold, double);


 vtkSetMacro(EnableViewAngleLOD, int);
 vtkGetMacro(EnableViewAngleLOD, int);


 vtkSetClampMacro(ViewAngleLODThreshold, double, 0.0, 1.0);
 vtkGetMacro(ViewAngleLODThreshold, double);


 double GetScreenOffset();
 void SetScreenOffset(double offset);


 vtkSetVector2Macro(ScreenOffsetVector, double);
 vtkGetVector2Macro(ScreenOffsetVector, double);

  void ComputeMatrix() override;

  void ShallowCopy(vtkProp *prop) override;

 static double AutoScale(vtkViewport *viewport, vtkCamera * camera,
                         double screenSize, double position[3]);


  int RenderOpaqueGeometry(vtkViewport *viewport) override;
  int RenderTranslucentPolygonalGeometry(vtkViewport *viewport) override;
  int RenderVolumetricGeometry(vtkViewport *viewport) override;

  virtual void SetViewport(vtkViewport* viewport);
  virtual vtkViewport* GetViewport();

protected:
  vtkProp3DAxisFollower();
  ~vtkProp3DAxisFollower() override;

 void CalculateOrthogonalVectors(double Rx[3], double Ry[3], double Rz[3],
                                 vtkAxisActor *axis1, double *dop,
                                 vtkViewport *ren);

 void ComputeRotationAndTranlation(vtkViewport *ren, double translation[3],
                                   double Rx[3], double Ry[3], double Rz[3],
                                   vtkAxisActor *axis);

 // \NOTE: Not used as of now.
 void ComputerAutoCenterTranslation(const double& autoScaleFactor,
                                    double translation[3]);

  int  TestDistanceVisibility();
  void ExecuteViewAngleVisibility(double normal[3]);

  bool IsTextUpsideDown(double* a, double* b);

  vtkTypeBool          AutoCenter;

  int          EnableDistanceLOD;
  double       DistanceLODThreshold;

  int          EnableViewAngleLOD;
  double       ViewAngleLODThreshold;

  double       ScreenOffsetVector [2];

  vtkWeakPointer<vtkAxisActor> Axis;
  vtkWeakPointer<vtkViewport> Viewport;
private:
  vtkProp3DAxisFollower(const vtkProp3DAxisFollower&) = delete;
  void operator=(const vtkProp3DAxisFollower&) = delete;

  int TextUpsideDown;
  int VisibleAtCurrentViewAngle;

};

#endif