Exemple #1
0
void DOFTransform::traverse(osg::NodeVisitor& nv)
{
    if (nv.getVisitorType()==osg::NodeVisitor::UPDATE_VISITOR)
    {
        // ensure that we do not operate on this node more than
        // once during this traversal.  This is an issue since node
        // can be shared between multiple parents.
        if ((nv.getTraversalNumber()!=_previousTraversalNumber) && nv.getFrameStamp())
        {
            double newTime = nv.getFrameStamp()->getSimulationTime();

            animate((float)(newTime-_previousTime));

            _previousTraversalNumber = nv.getTraversalNumber();
            _previousTime = newTime;
        }
    }

    Transform::traverse(nv);
}
Exemple #2
0
void
OcclusionQueryNode::traverseQuery( const osg::Camera* camera, osg::NodeVisitor& nv )
{
    bool issueQuery;
    {
        const int curFrame = nv.getTraversalNumber();

        OpenThreads::ScopedLock<OpenThreads::Mutex> lock( _frameCountMutex );
        int& lastQueryFrame = _frameCountMap[ camera ];
        if ( issueQuery = (curFrame - lastQueryFrame >= _queryFrameCount) )
            lastQueryFrame = curFrame;
    }
    if (issueQuery)
        _queryGeode->accept( nv );
}
Exemple #3
0
void SoundNode::traverse(osg::NodeVisitor &nv)
{
    // continue only if the visitor actually is a cull visitor
    if (nv.getVisitorType() == osg::NodeVisitor::CULL_VISITOR)
    {
        // Make sure we only execute this once during this frame.
        // There could be two or more culls for stereo/multipipe...
        if (!m_sound_state.valid()) {
            // call the inherited method
            osg::notify(osg::DEBUG_INFO) << "SoundNode::traverse() No soundstate attached to soundnode" << std::endl;
            Node::traverse(nv);
            return;
        }
        if ( m_sound_state.valid() && nv.getTraversalNumber() != m_last_traversal_number && nv.getFrameStamp())
        {

            m_last_traversal_number = nv.getTraversalNumber();

            // retrieve the current time
            double t = nv.getFrameStamp()->getReferenceTime();
            double time = t - m_last_time;

            if(time >= m_sound_manager->getUpdateFrequency()) {

                osg::Matrix m;
                m = osg::computeLocalToWorld(nv.getNodePath());

                osg::Vec3 pos = m.getTrans();

                m_sound_state->setPosition(pos);

                //Calculate velocity
                osg::Vec3 velocity(0,0,0);

                if (m_first_run) {
                    m_first_run = false;
                    m_last_time = t;
                    m_last_pos = pos;
                }
                else {
                    velocity = pos - m_last_pos;
                    m_last_pos = pos;
                    m_last_time = t;
                    velocity /= time;
                }

                if(m_sound_manager->getClampVelocity()) {
                    float max_vel = m_sound_manager->getMaxVelocity();
                    float len = velocity.length();
                    if ( len > max_vel) {
                        velocity.normalize();
                        velocity *= max_vel;
                    }
                }

                m_sound_state->setVelocity(velocity);

                //Get new direction
                osg::Vec3 dir(0,1,0);

                dir = dir * m;
                dir.normalize();
                m_sound_state->setDirection(dir);      

                // Only do occlusion calculations if the sound is playing
                if (m_sound_state->getPlay() && m_occlude_callback.valid())
                    m_occlude_callback->apply(m_sound_manager->getListenerMatrix(), pos, m_sound_state.get());
            } // if
        }
    } // if cullvisitor

    // call the inherited method
    Node::traverse(nv);
}