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);
}
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 );
}
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);
}
