VP1CameraHelper.h

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/*
  Copyright (C) 2002-2024 CERN for the benefit of the ATLAS collaboration
*/
 
//                                                         //
//  Header file for class VP1CameraHelper                  //
//                                                         //
//  Author: Thomas Kittelmann <Thomas.Kittelmann@cern.ch>  //
//                                                         //
//  Initial version: July 2007                             //
//                                                         //
 
#ifndef VP1CAMERAHELPER_H
#define VP1CAMERAHELPER_H
 
#include <QObject>
#include <Inventor/C/errors/debugerror.h>
#include <Inventor/SbVec3f.h>
 
// fwd declarations
class SoQtRenderArea;
class VP1ExaminerViewer;
class SoCamera;
class SoNode;
class SbBox3f;
class SoGroup;
class SoPath;
 
class VP1CameraHelper : public QObject {
 
  Q_OBJECT
 
public:
 
  static void abortAnyCurrentZoom( SoCamera * camera );
 
  //Returned pointers are only for the case where you want to catch
  //one of the signals that are emitted when the animation finishes.
 
  //NB: For the vector arguments below, the special value of
  //SbVec3f(999,999,999) means that the cameras current value will be
  //used!!
 
  //For zoom to persistified camera states:
  static VP1CameraHelper * animatedZoomToCameraState( SoCamera * camera, SoGroup * sceneroot,
                              const QByteArray& camstate,
                              double duration_in_secs = 1.0, double clipVolPercent=100.0, double lastClipVolPercent=100.0, bool varySpeed=true,
                              bool forceCircular = false );
 
  //Imitate the zoom towards a point (similar to the ones initiated by the user in an examiner viewer):
  static VP1CameraHelper * animatedZoomToPoint( SoCamera * camera, SoGroup * sceneroot,
                        SbVec3f, double duration_in_secs = 1.0, double clipVolPercent=100.0, bool varySpeed=true,
                        bool forceCircular = false );
 
  //For the next three methods, slack < 1.0 gives tighter zoom and slack > 1.0 gives looser zoom.
  //The first two are more reliable:
  static VP1CameraHelper * animatedZoomToPath( SoCamera * camera, SoGroup * sceneroot,
                           SoPath * path, double duration_in_secs = 1.0, double clipVolPercent=100.0, double slack = 1.0,
                           const SbVec3f& lookat = SbVec3f(999,999,999),
                           const SbVec3f& upvec = SbVec3f(999,999,999), bool varySpeed=true,
                           bool forceCircular = false );
 
  static VP1CameraHelper *  animatedZoomToBBox( SoCamera * camera, SoGroup * sceneroot,
                        const SbBox3f& box,double duration_in_secs = 1.0, double clipVolPercent=100.0,  double slack = 1.0,
                        const SbVec3f& lookat = SbVec3f(999,999,999),
                        const SbVec3f& upvec = SbVec3f(999,999,999),bool varySpeed=true,
                        bool forceCircular = false );
 
  //Dont use the following if subtreeroot appears multiple times in your scenegraph:
  static VP1CameraHelper * animatedZoomToSubTree( SoCamera * camera, SoGroup * sceneroot,
                          SoNode*subtreeroot,double duration_in_secs = 1.0, double clipVolPercent=100.0, double lastClipVolPercent=100.0, double slack = 1.0,
                          const SbVec3f& lookat = SbVec3f(999,999,999),
                          const SbVec3f& upvec = SbVec3f(999,999,999), bool varySpeed=true,
                          bool forceCircular = false );
 
  //For outputting off-screen rendered frames to image files:
//  void setOutputImagesMode(SoQtRenderArea * ra,
  void setOutputImagesMode(VP1ExaminerViewer * ra,
               const QString& outputdir,
               int width = 1024,
               int height = 768,
               double fps = 24,
               const QString& prefix = "vp1_frame");
 
  static void getLastAndNextFrameFileNames( const QString& outputdir,const QString& prefix,
                        QString& lastOfExistingFiles,//=> returned as empty string if no existing files
                        QString& nextAvailableFile );
 
  //Force premature end:
  void forceAbort();
 
signals:
  void animationFinished();//If Bob's your uncle and everything went as expected.
  void animationFinishedAbnormally();//If e.g. the camera was deleted by someone else during animation.
  void clipVolumePercentageOfATLAS(double);//The percentage of the ATLAS vol corresponding the clipping volume
 
private:
  VP1CameraHelper( SoCamera *, SoGroup * );
  virtual ~VP1CameraHelper();
  class Imp;
  Imp * m_d;
};
 
#endif