void
TileNode::load(osg::NodeVisitor& nv)
{
// Access the context:
EngineContext* context = static_cast<EngineContext*>( nv.getUserData() );
// Create a new load request on demand:
if ( !_loadRequest.valid() )
{
Threading::ScopedMutexLock lock(_mutex);
if ( !_loadRequest.valid() )
{
_loadRequest = new LoadTileData( this, context );
_loadRequest->setName( _key.str() );
_loadRequest->setTileKey( _key );
}
}
// Prioritize by LOD. (negated because lower order gets priority)
float priority = - (float)getTileKey().getLOD();
if ( context->getOptions().highResolutionFirst() == true )
priority = -priority;
// then sort by distance within each LOD.
float distance = nv.getDistanceToViewPoint( getBound().center(), true );
priority = 10.0f*priority - log10(distance);
// testing intermediate loading idea...
//if ( getTileKey().getLOD() == 5 )
// priority += 100.0f;
// Submit to the loader.
context->getLoader()->load( _loadRequest.get(), priority, nv );
}
void ElevationLOD::traverse( osg::NodeVisitor& nv)
{
if (nv.getVisitorType() == osg::NodeVisitor::CULL_VISITOR &&
nv.getTraversalMode() == osg::NodeVisitor::TRAVERSE_ACTIVE_CHILDREN )
{
bool rangeOK = true;
bool altitudeOK = true;
// first test the range:
if ( _minRange.isSet() || _maxRange.isSet() )
{
float range = nv.getDistanceToViewPoint( getBound().center(), true );
rangeOK =
(!_minRange.isSet() || (range >= *_minRange)) &&
(!_maxRange.isSet() || (range <= *_maxRange));
}
if ( rangeOK )
{
if ( _minElevation.isSet() || _maxElevation.isSet() )
{
double alt;
// first see if we have a precalculated elevation:
osgUtil::CullVisitor* cv = Culling::asCullVisitor(nv);
osg::Vec3d eye = cv->getViewPoint();
if ( _srs && !_srs->isProjected() )
{
GeoPoint mapPoint;
mapPoint.fromWorld( _srs.get(), eye );
alt = mapPoint.z();
}
else
{
alt = eye.z();
}
// account for the LOD scale
alt *= cv->getLODScale();
altitudeOK =
(!_minElevation.isSet() || (alt >= *_minElevation)) &&
(!_maxElevation.isSet() || (alt <= *_maxElevation));
}
if ( altitudeOK )
{
std::for_each(_children.begin(),_children.end(),osg::NodeAcceptOp(nv));
}
}
}
else
{
osg::Group::traverse( nv );
}
}
void
HTMNode::traverse(osg::NodeVisitor& nv)
{
if ( nv.getVisitorType() == nv.CULL_VISITOR )
{
//OE_INFO << getName() << std::endl;
#if 0
if ( _isLeaf )
{
if (_settings._debugFrame != nv.getFrameStamp()->getFrameNumber())
{
OE_NOTICE << "Frame " << _settings._debugFrame << ": " << _settings._debugCount << std::endl;
_settings._debugCount = 0;
_settings._debugFrame = nv.getFrameStamp()->getFrameNumber();
}
_settings._debugCount += getNumChildren();
}
#endif
const osg::BoundingSphere& bs = getBound();
float range = nv.getDistanceToViewPoint(bs.center(), true);
bool inRange = false;
if (_settings._maxRange.isSet() == false)
{
inRange = range < (bs.radius() * _settings._rangeFactor.get());
}
else
{
inRange = range < (bs.radius() + _settings._maxRange.get());
}
if ( inRange )
{
osg::Group::traverse( nv );
if (_debug.valid() && _isLeaf)
{
_debug->accept(nv);
}
}
else if (_debug.valid())
{
_debug->accept(nv);
}
}
else
{
if (_debug.valid())
{
_debug->accept(nv);
}
osg::Group::traverse( nv );
}
}
void
TileGroup::traverse(osg::NodeVisitor& nv)
{
if ( nv.getTraversalMode() == nv.TRAVERSE_ACTIVE_CHILDREN )
{
float range = 0.0f;
if ( nv.getVisitorType() == nv.CULL_VISITOR )
{
range = nv.getDistanceToViewPoint( getBound().center(), true );
}
// if all four subtiles have reported that they are upsampling,
// don't use any of them.
if ( _traverseSubtiles && _numSubtilesUpsampling == 4 )
{
_traverseSubtiles = false;
}
// if we are out of subtile range, or we're in range but the subtiles are
// not all loaded yet, or we are skipping subtiles, draw the current tile.
if ( range > _subtileRange || _numSubtilesLoaded < 4 || !_traverseSubtiles )
{
_tilenode->accept( nv );
}
// if we're in range, traverse the subtiles.
if ( _traverseSubtiles && range <= _subtileRange )
{
for( unsigned q=0; q<4; ++q )
{
getChild(1+q)->accept( nv );
}
// update the TileNode so it knows what frame we're in.
if ( nv.getFrameStamp() )
{
_tilenode->setLastTraversalFrame( nv.getFrameStamp()->getFrameNumber() );
}
}
}
else
{
osg::Group::traverse( nv );
}
}
void
TileNode::load(osg::NodeVisitor& nv)
{
// Access the context:
EngineContext* context = VisitorData::fetch<EngineContext>(nv, ENGINE_CONTEXT_TAG);
// Create a new load request on demand:
if ( !_loadRequest.valid() )
{
Threading::ScopedMutexLock lock(_mutex);
if ( !_loadRequest.valid() )
{
_loadRequest = new LoadTileData( this, context );
_loadRequest->setName( _key.str() );
_loadRequest->setTileKey( _key );
}
}
// Construct the load PRIORITY: 0=lowest, 1=highest.
const SelectionInfo& si = context->getSelectionInfo();
int lod = getTileKey().getLOD();
int numLods = si.numLods();
// LOD priority is in the range [0..numLods]
float lodPriority = (float)lod;
if ( context->getOptions().highResolutionFirst() == false )
lodPriority = (float)(numLods - lod);
float distance = nv.getDistanceToViewPoint(getBound().center(), true);
// dist priority uis in the range [0..1]
float distPriority = 1.0 - distance/si.visParameters(0)._visibilityRange;
// add thenm together, and you get tiles sorted first by lodPriority (because of
// the biggest range), and second by distance.
float priority = lodPriority + distPriority;
// normalize the composite priority to [0..1].
priority /= (float)(numLods+1);
// Submit to the loader.
context->getLoader()->load( _loadRequest.get(), priority, nv );
}
void LOD::traverse(osg::NodeVisitor& nv)
{
if(_dirty_copy)
{
osg::Group* prnt = getParent(0);
for(unsigned i =0;i<prnt->getNumChildren();++i)
{
auto chld = prnt->getChild(i);
if (!dynamic_cast<avLod::LOD*>(chld))
addChild(chld);
}
_dirty_copy =false;
}
switch(nv.getTraversalMode())
{
//case(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN):
// std::for_each(_children.begin(),_children.end(),NodeAcceptOp(nv));
// break;
case(osg::NodeVisitor::TRAVERSE_ACTIVE_CHILDREN):
{
float required_range = 0;
if (_rangeMode==DISTANCE_FROM_EYE_POINT)
{
required_range = nv.getDistanceToViewPoint(getCenter(),true);
}
else
{
osg::CullStack* cullStack = dynamic_cast<osg::CullStack*>(&nv);
if (cullStack && cullStack->getLODScale())
{
required_range = cullStack->clampedPixelSize(getBound()) / cullStack->getLODScale();
}
else
{
// fallback to selecting the highest res tile by
// finding out the max range
for(unsigned int i=0;i<_rangeList.size();++i)
{
required_range = osg::maximum(required_range,_rangeList[i].first);
}
}
}
unsigned int numChildren = _children.size();
if (_rangeList.size()<numChildren) numChildren=_rangeList.size();
for(unsigned int i=0;i<numChildren;++i)
{
if (_rangeList[i].first<=required_range && required_range<_rangeList[i].second)
{
_children[i]->setNodeMask(/*0xffffffff*/REFLECTION_MASK);// accept(nv);
}
else
{
_children[i]->setNodeMask(0);
}
}
break;
}
default:
break;
}
}
// MOST of this is copied and pasted from OSG's osg::PagedLOD::traverse,
// except where otherwise noted with an "osgEarth" comment.
void
TilePagedLOD::traverse(osg::NodeVisitor& nv)
{
// set the frame number of the traversal so that external nodes can find out how active this
// node is.
if (nv.getFrameStamp() &&
nv.getVisitorType()==osg::NodeVisitor::CULL_VISITOR)
{
setFrameNumberOfLastTraversal(nv.getFrameStamp()->getFrameNumber());
// osgEarth: update our progress tracker to prevent tile cancelation.
if (_progress.valid())
{
_progress->update( nv.getFrameStamp()->getFrameNumber() );
}
}
double timeStamp = nv.getFrameStamp()?nv.getFrameStamp()->getReferenceTime():0.0;
unsigned int frameNumber = nv.getFrameStamp()?nv.getFrameStamp()->getFrameNumber():0;
bool updateTimeStamp = nv.getVisitorType()==osg::NodeVisitor::CULL_VISITOR;
switch(nv.getTraversalMode())
{
case(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN):
std::for_each(_children.begin(),_children.end(),osg::NodeAcceptOp(nv));
break;
case(osg::NodeVisitor::TRAVERSE_ACTIVE_CHILDREN):
{
osg::ref_ptr<MPTerrainEngineNode> engine;
MPTerrainEngineNode::getEngineByUID( _engineUID, engine );
if (!engine.valid())
return;
// Compute the required range.
float required_range = -1.0;
if (engine->getComputeRangeCallback())
{
required_range = (*engine->getComputeRangeCallback())(this, nv);
}
// If we don't have a callback or it return a negative number fallback on the original calculation.
if (required_range < 0.0)
{
if (_rangeMode==DISTANCE_FROM_EYE_POINT)
{
required_range = nv.getDistanceToViewPoint(getCenter(),true);
if (_rangeFactor.isSet())
required_range /= _rangeFactor.get();
}
else
{
osg::CullStack* cullStack = dynamic_cast<osg::CullStack*>(&nv);
if (cullStack && cullStack->getLODScale()>0.0f)
{
required_range = cullStack->clampedPixelSize(getBound()) / cullStack->getLODScale();
}
else
{
// fallback to selecting the highest res tile by
// finding out the max range
for(unsigned int i=0;i<_rangeList.size();++i)
{
required_range = osg::maximum(required_range,_rangeList[i].first);
}
}
}
}
int lastChildTraversed = -1;
bool needToLoadChild = false;
for(unsigned int i=0;i<_rangeList.size();++i)
{
if (_rangeList[i].first<=required_range && required_range<_rangeList[i].second)
{
if (i<_children.size())
{
if (updateTimeStamp)
{
_perRangeDataList[i]._timeStamp=timeStamp;
_perRangeDataList[i]._frameNumber=frameNumber;
}
_children[i]->accept(nv);
lastChildTraversed = (int)i;
}
else
{
needToLoadChild = true;
}
}
}
#ifdef INHERIT_VIEWPOINT_CAMERAS_CANNOT_SUBDIVIDE
// Prevents an INHERIT_VIEWPOINT camera from invoking tile subdivision
if (needToLoadChild)
{
osgUtil::CullVisitor* cv = dynamic_cast<osgUtil::CullVisitor*>(&nv);
if ( cv && cv->getCurrentCamera() && cv->getCurrentCamera()->getReferenceFrame() == osg::Camera::ABSOLUTE_RF_INHERIT_VIEWPOINT )
needToLoadChild = false;
}
#endif
if (needToLoadChild)
{
unsigned int numChildren = _children.size();
// select the last valid child.
if (numChildren>0 && ((int)numChildren-1)!=lastChildTraversed)
{
if (updateTimeStamp)
{
_perRangeDataList[numChildren-1]._timeStamp=timeStamp;
_perRangeDataList[numChildren-1]._frameNumber=frameNumber;
}
_children[numChildren-1]->accept(nv);
}
// now request the loading of the next unloaded child.
if (!_disableExternalChildrenPaging &&
nv.getDatabaseRequestHandler() &&
numChildren<_perRangeDataList.size())
{
// osgEarth: Perform a tile visibility check before requesting the new tile.
// Intersect the tile's earth-aligned bounding box with the current culling frustum.
bool tileIsVisible = true;
if (nv.getVisitorType() == nv.CULL_VISITOR &&
numChildren < _childBBoxes.size() &&
_childBBoxes[numChildren].valid())
{
osgUtil::CullVisitor* cv = Culling::asCullVisitor( nv );
// wish that CullStack::createOrReuseRefMatrix() was public
osg::ref_ptr<osg::RefMatrix> mvm = new osg::RefMatrix(*cv->getModelViewMatrix());
mvm->preMult( _childBBoxMatrices[numChildren] );
cv->pushModelViewMatrix( mvm.get(), osg::Transform::RELATIVE_RF );
tileIsVisible = !cv->isCulled( _childBBoxes[numChildren] );
cv->popModelViewMatrix();
}
if ( tileIsVisible )
{
// [end:osgEarth]
// compute priority from where abouts in the required range the distance falls.
float priority = (_rangeList[numChildren].second-required_range)/(_rangeList[numChildren].second-_rangeList[numChildren].first);
// invert priority for PIXEL_SIZE_ON_SCREEN mode
if(_rangeMode==PIXEL_SIZE_ON_SCREEN)
{
priority = -priority;
}
// modify the priority according to the child's priority offset and scale.
priority = _perRangeDataList[numChildren]._priorityOffset + priority * _perRangeDataList[numChildren]._priorityScale;
if (_databasePath.empty())
{
nv.getDatabaseRequestHandler()->requestNodeFile(_perRangeDataList[numChildren]._filename,nv.getNodePath(),priority,nv.getFrameStamp(), _perRangeDataList[numChildren]._databaseRequest, _databaseOptions.get());
}
else
{
// prepend the databasePath to the child's filename.
nv.getDatabaseRequestHandler()->requestNodeFile(_databasePath+_perRangeDataList[numChildren]._filename,nv.getNodePath(),priority,nv.getFrameStamp(), _perRangeDataList[numChildren]._databaseRequest, _databaseOptions.get());
}
}
}
}
break;
}
default:
break;
}
}