C++ SoundPtr::setVolume方法代码示例

    // Add a sound to the list and play it
    void SoundManager::add(const std::string &file,
             MWWorld::Ptr ptr,
             const std::string &id,
             float volume, float pitch,
             float min, float max,
             bool loop, bool untracked)
    {
      try
        {
          SoundPtr snd = mgr->load(file);
          snd->setRepeat(loop);
          snd->setVolume(volume);
          snd->setPitch(pitch);
          snd->setRange(min,max);
          setPos(snd, ptr);
          snd->play();

          if (!untracked)
          {
            sounds[ptr][id] = WSoundPtr(snd);
          }
        }
      catch(...)
        {
          std::cout << "Error loading " << file << ", skipping.\n";
        }
    }

  void SoundManager::playSound(const std::string& soundId, float volume, float pitch, bool loop)
  {
    float min, max;
    const std::string &file = lookup(soundId, volume, min, max);
    if (file != "")
    {
        SoundPtr snd = mgr->load(file);
        snd->setRepeat(loop);
        snd->setVolume(volume);
        snd->setRange(min,max);
        snd->setPitch(pitch);
        snd->setRelative(true);
        snd->play();

        if (loop)
        {
            // Only add the looping sound once
            IDMap::iterator it = mLoopedSounds.find(soundId);
            if(it == mLoopedSounds.end())
            {
                mLoopedSounds[soundId] = WSoundPtr(snd);
            }
        }
    }
  }

 TutorialCollisionListener(Path SoundFilePath)
 {
     _CollisionSound = SoundManager::the()->createSound();
     beginEditCP(_CollisionSound, Sound::FileFieldMask | Sound::VolumeFieldMask | Sound::StreamingFieldMask | Sound::LoopingFieldMask);
         _CollisionSound->setFile(SoundFilePath);
         _CollisionSound->setVolume(1.0);
         _CollisionSound->setStreaming(false);
         _CollisionSound->setLooping(0);
     endEditCP(_CollisionSound, Sound::FileFieldMask | Sound::VolumeFieldMask | Sound::StreamingFieldMask | Sound::LoopingFieldMask);
 }

 void SoundManager::playSound (const std::string& soundId, float volume, float pitch)
 {
   if(!mData) return;
   // Play and forget
   float min, max;
   const std::string &file = mData->lookup(soundId, volume, min, max);
   if(file != "")
     {
       SoundPtr snd = mData->mgr->load(file);
       snd->setVolume(volume);
       snd->setRange(min,max);
       snd->setPitch(pitch);
       snd->play();
     }
 }

//.........这里部分代码省略.........

    // Make Main Scene Node and add the Torus
    scene = osg::Node::create();
    beginEditCP(scene, Node::CoreFieldMask | Node::ChildrenFieldMask);
        scene->setCore(osg::Group::create());
        scene->addChild(TorusGeometryNode);
    endEditCP(scene, Node::CoreFieldMask | Node::ChildrenFieldMask);


    // Create the Graphics
    GraphicsPtr TutorialGraphics = osg::Graphics2D::create();

    // Initialize the LookAndFeelManager to enable default settings
    LookAndFeelManager::the()->getLookAndFeel()->init();

    
    LayoutPtr MainInternalWindowLayout = osg::FlowLayout::create();



    PanelPtr CaptionContainer = osg::Panel::create();

    beginEditCP(CaptionContainer, Panel::PreferredSizeFieldMask | Panel::LayoutFieldMask);
        CaptionContainer->setPreferredSize(Pnt2f(250.0,30.0));
        CaptionContainer->setLayout(MainInternalWindowLayout);
    endEditCP(CaptionContainer, Panel::PreferredSizeFieldMask | Panel::LayoutFieldMask);

    //Initialize the Sound Manager
    SoundManager::the()->attachUpdateProducer(TutorialWindowEventProducer);

    TutorialSound = SoundManager::the()->createSound();
    beginEditCP(TutorialSound, Sound::FileFieldMask | Sound::VolumeFieldMask | Sound::StreamingFieldMask | Sound::LoopingFieldMask);
        TutorialSound->setFile(Path("./Data/captionSoundFile.ogg"));
        TutorialSound->setVolume(1.0);
        TutorialSound->setStreaming(true);
        TutorialSound->setLooping(0);
    endEditCP(TutorialSound, Sound::FileFieldMask | Sound::VolumeFieldMask | Sound::StreamingFieldMask | Sound::LoopingFieldMask);

    // Create the Caption
    TutorialCaption = osg::Caption::create();

    //Add the segments of text to be displayed
    TutorialCaption->captionSegment("Listeners can be used for a variety",1.7,3.4);
    TutorialCaption->captionSegment("of different applications.",3.4,4.7);
    TutorialCaption->captionSegment("In this tutorial we will",5.0,6.35);
    TutorialCaption->captionSegment("simply be changing the background though.",6.35,8.0);
    TutorialCaption->captionSegment("First we will change the",8.8,10.2);
    TutorialCaption->captionSegment("torus on screen to a sphere.",10.2,11.75);
    TutorialCaption->captionSegment("By timing things correctly we can make",12.7,14.6);
    TutorialCaption->captionSegment("the changes right as the word is spoken.",14.6,16.75);
    TutorialCaption->captionSegment("Such as changing the sphere to a cube",17.3,20.0);
    TutorialCaption->captionSegment("but personally I would prefer",20.33,21.65);
    TutorialCaption->captionSegment("the background to be blank.",21.65,22.8);
    TutorialCaption->captionSegment("Much better!",23.8,25.0);


    //Add the tutorial Caption Listener to the Caption that was set up for the tutorial
    TutorialCaptionListener TheCaptionListener;
    TutorialCaption->addCaptionListener(&TheCaptionListener);

    //Create the Caption component Generator
    TutorialCapGen = DefaultCaptionComponentGenerator::create();

    TutorialCaption->attachWindowEventProducer(TutorialWindowEventProducer);
    beginEditCP(TutorialCaption, Caption::ParentContainerFieldMask | Caption::ComponentGeneratorFieldMask | Caption::CaptionDialogSoundFieldMask);
        TutorialCaption->setParentContainer(CaptionContainer);