void TileNode::cull(osg::NodeVisitor& nv)
{
if ( nv.getFrameStamp() )
{
_lastTraversalFrame.exchange( nv.getFrameStamp()->getFrameNumber() );
}
unsigned currLOD = getTileKey().getLOD();
osgUtil::CullVisitor* cv = static_cast<osgUtil::CullVisitor*>( &nv );
EngineContext* context = static_cast<EngineContext*>( nv.getUserData() );
const SelectionInfo& selectionInfo = context->getSelectionInfo();
if ( context->progress() )
context->progress()->stats()["TileNode::cull"]++;
// determine whether we can and should subdivide to a higher resolution:
bool subdivide =
shouldSubDivide(nv, selectionInfo, cv->getLODScale());
// whether it is OK to create child TileNodes is necessary.
bool canCreateChildren = subdivide;
// whether it is OK to load data if necessary.
bool canLoadData = true;
if ( _dirty && context->getOptions().progressive() == true )
{
// Don't create children in progressive mode until content is in place
canCreateChildren = false;
}
else
{
// If this is an inherit-viewpoint camera, we don't need it to invoke subdivision
// because we want only the tiles loaded by the true viewpoint.
const osg::Camera* cam = cv->getCurrentCamera();
if ( cam && cam->getReferenceFrame() == osg::Camera::ABSOLUTE_RF_INHERIT_VIEWPOINT )
{
canCreateChildren = false;
canLoadData = false;
}
}
optional<bool> surfaceVisible;
// If *any* of the children are visible, subdivide.
if (subdivide)
{
// We are in range of the child nodes. Either draw them or load them.
// If the children don't exist, create them and inherit the parent's data.
if ( getNumChildren() == 0 && canCreateChildren )
{
Threading::ScopedMutexLock exclusive(_mutex);
if ( getNumChildren() == 0 )
{
createChildren( context );
}
}
// If all are ready, traverse them now.
if ( getNumChildren() == 4 )
{
for(int i=0; i<4; ++i)
{
_children[i]->accept( nv );
}
}
// If we don't traverse the children, traverse this node's payload.
else if ( _surface.valid() )
{
surfaceVisible = acceptSurface( cv, context );
}
}
// If children are outside camera range, draw the payload and expire the children.
else if ( _surface.valid() )
{
surfaceVisible = acceptSurface( cv, context );
if ( getNumChildren() >= 4 && context->maxLiveTilesExceeded() )
{
if (getSubTile(0)->isDormant( nv ) &&
getSubTile(1)->isDormant( nv ) &&
getSubTile(2)->isDormant( nv ) &&
getSubTile(3)->isDormant( nv ))
{
expireChildren( nv );
}
}
}
// Traverse land cover data at this LOD.
int zoneIndex = context->_landCoverData->_currentZoneIndex;
if ( zoneIndex < (int)context->_landCoverData->_zones.size() )
{
unsigned clearMask = cv->getCurrentCamera()->getClearMask();
bool isDepthCamera = ((clearMask & GL_COLOR_BUFFER_BIT) == 0u) && ((clearMask & GL_DEPTH_BUFFER_BIT) != 0u);
bool isShadowCamera = osgEarth::Shadowing::isShadowCamera(cv->getCurrentCamera());
// only consider land cover if we are capturing color OR shadow.
if ( isShadowCamera || !isDepthCamera )
{
const LandCoverZone& zone = context->_landCoverData->_zones.at(zoneIndex);
for(int i=0; i<zone._bins.size(); ++i)
{
bool pushedPayloadSS = false;
const LandCoverBin& bin = zone._bins.at(i);
if ( bin._lod == _key.getLOD() && (!isShadowCamera || bin._castShadows) )
{
if ( !pushedPayloadSS )
{
cv->pushStateSet( _payloadStateSet.get() );
pushedPayloadSS = true;
}
cv->pushStateSet( bin._stateSet.get() ); // hopefully groups together for rendering.
_landCover->accept( nv );
cv->popStateSet();
}
if ( pushedPayloadSS )
{
cv->popStateSet();
}
}
}
}
// If this tile is marked dirty, try loading data.
if ( _dirty && canLoadData )
{
// Only load data if the surface would be visible to the camera
if ( !surfaceVisible.isSet() )
{
surfaceVisible = _surface->isVisible(cv);
}
if ( surfaceVisible == true )
{
load( nv );
}
else
{
OE_DEBUG << LC << "load skipped for " << _key.str() << std::endl;
}
}
}
void TileNode::cull(osg::NodeVisitor& nv)
{
if ( nv.getFrameStamp() )
{
_lastTraversalFrame.exchange( nv.getFrameStamp()->getFrameNumber() );
}
unsigned currLOD = getTileKey().getLOD();
#if OSGEARTH_REX_TILE_NODE_DEBUG_TRAVERSAL
if (currLOD==0)
{
OE_INFO << LC <<"Traversing: "<<"\n";
}
#endif
osgUtil::CullVisitor* cv = dynamic_cast<osgUtil::CullVisitor*>( &nv );
EngineContext* context = static_cast<EngineContext*>( nv.getUserData() );
const SelectionInfo& selectionInfo = context->getSelectionInfo();
// determine whether we can and should subdivide to a higher resolution:
bool subdivide = shouldSubDivide(nv, selectionInfo, cv->getLODScale());
// If this is an inherit-viewpoint camera, we don't need it to invoke subdivision
// because we want only the tiles loaded by the true viewpoint.
bool canCreateChildren = subdivide;
const osg::Camera* cam = cv->getCurrentCamera();
if ( cam && cam->getReferenceFrame() == osg::Camera::ABSOLUTE_RF_INHERIT_VIEWPOINT )
{
canCreateChildren = false;
}
// If *any* of the children are visible, subdivide.
if (subdivide)
{
// We are in range of the child nodes. Either draw them or load them.
// If the children don't exist, create them and inherit the parent's data.
if ( getNumChildren() == 0 && canCreateChildren )
{
Threading::ScopedMutexLock exclusive(_mutex);
if ( getNumChildren() == 0 )
{
createChildren( context );
}
}
// All 4 children must be ready before we can traverse any of them:
unsigned numChildrenReady = 0;
if ( getNumChildren() == 4 )
{
for(unsigned i = 0; i < 4; ++i)
{
if ( getSubTile(i)->isReadyToTraverse() )
{
++numChildrenReady;
}
}
}
// If all are ready, traverse them now.
if ( numChildrenReady == 4 )
{
// TODO:
// When we do this, we need to quite sure that all 4 children will be accepted into
// the draw set. Perhaps isReadyToTraverse() needs to check that.
_children[0]->accept( nv );
_children[1]->accept( nv );
_children[2]->accept( nv );
_children[3]->accept( nv );
}
// If we don't traverse the children, traverse this node's payload.
else if ( _surface.valid() )
{
cullSurface( cv );
}
}
// If children are outside camera range, draw the payload and expire the children.
else if ( _surface.valid() )
{
cullSurface( cv );
if ( getNumChildren() >= 4 && context->maxLiveTilesExceeded() )
{
if (getSubTile(0)->isDormant( nv ) &&
getSubTile(1)->isDormant( nv ) &&
getSubTile(2)->isDormant( nv ) &&
getSubTile(3)->isDormant( nv ))
{
expireChildren( nv );
}
}
}
// Traverse land cover bins at this LOD.
for(int i=0; i<context->landCoverBins()->size(); ++i)
{
bool first = true;
const LandCoverBin& bin = context->landCoverBins()->at(i);
if ( bin._lod == getTileKey().getLOD() )
{
if ( first )
{
cv->pushStateSet( _payloadStateSet.get() );
}
cv->pushStateSet( bin._stateSet.get() );
_landCover->accept( nv );
cv->popStateSet();
if ( first )
{
cv->popStateSet();
first = false;
}
}
}
// If this tile is marked dirty, try loading data.
if ( _dirty )
{
load( nv );
}
}