osgUtil::CullVisitor*
Culling::asCullVisitor(osg::NodeVisitor* nv)
{
if ( !nv )
return 0L;
osgUtil::CullVisitor* cv = dynamic_cast<osgUtil::CullVisitor*>( nv );
if ( cv )
return cv;
ProxyCullVisitor* pcv = dynamic_cast<ProxyCullVisitor*>( nv );
if ( pcv )
return pcv->getCullVisitor();
return 0L;
}
void
ClampingCullSet::accept(osg::NodeVisitor& nv)
{
if ( nv.getVisitorType() == nv.CULL_VISITOR )
{
ProxyCullVisitor* cv = dynamic_cast<ProxyCullVisitor*>(&nv);
// We will use the visitor's path to prevent doubely-applying the statesets
// of common ancestors
const osg::NodePath& nvPath = nv.getNodePath();
int frame = nv.getFrameStamp() ? nv.getFrameStamp()->getFrameNumber() : 0u;
unsigned passed = 0u;
for( std::vector<Entry>::iterator entry = _entries.begin(); entry != _entries.end(); ++entry )
{
if ( frame - entry->_frame > 1 )
continue;
// If there's an active (non-identity matrix), apply it
if ( entry->_matrix.valid() )
{
entry->_matrix->postMult( *cv->getModelViewMatrix() );
cv->pushModelViewMatrix( entry->_matrix.get(), osg::Transform::RELATIVE_RF );
}
// After pushing the matrix, we can perform the culling bounds test.
if (!cv->isCulledByProxyFrustum(*entry->_node.get()))
{
// Apply the statesets in the entry's node path, but skip over the ones that are
// shared with the current visitor's path since they are already in effect.
// Count them so we can pop them later.
int numStateSets = 0;
osg::RefNodePath nodePath;
if ( entry->_path.getRefNodePath(nodePath) )
{
for(unsigned i=0; i<nodePath.size(); ++i)
{
if (nodePath[i].valid())
{
if (i >= nvPath.size() || nvPath[i] != nodePath[i].get())
{
osg::StateSet* stateSet = nodePath[i]->getStateSet();
if ( stateSet )
{
cv->getCullVisitor()->pushStateSet( stateSet );
++numStateSets;
}
}
}
}
}
// Cull the DrapeableNode's children (but not the DrapeableNode itself!)
for(unsigned i=0; i<entry->_node->getNumChildren(); ++i)
{
entry->_node->getChild(i)->accept( nv );
}
// pop the same number we pushed
for(int i=0; i<numStateSets; ++i)
{
cv->getCullVisitor()->popStateSet();
}
++passed;
}
// pop the model view:
if ( entry->_matrix.valid() )
{
cv->popModelViewMatrix();
}
//Registry::instance()->startActivity("ClampingCullSet", Stringify() << std::hex << this << std::dec << " / " << passed << "/" << _entries.size());
}
// mark this set so it will reset for the next frame
_frameCulled = true;
}
}
