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Generalised the osg::ClusterCullingCallback so that it coud be attached

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to Node as well as Drawables.

Changed the osgTerrain::DataSet so that it moves the ClusterCullingCallback
up to the Node level.

Added support to the .ive plugin for attaching the ClusterCullingCallback to nodes.
This commit is contained in:
Robert Osfield
2004-10-21 09:36:34 +00:00
parent bba69b288b
commit 93c439ba01
5 changed files with 153 additions and 12 deletions
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90
src/osgTerrain/DataSet.cpp
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@@ -2303,9 +2303,10 @@ osg::Node* DataSet::DestinationTile::createPolygonal()
float local_dot_product = -sin(theta + phi);
float local_m = globe_radius*( 1.0/ cos(theta+phi) - 1.0);
float local_radius = static_cast<float>(globe_radius * tan(beta)); // beta*globe_radius;
min_dot_product = osg::minimum(min_dot_product, local_dot_product);
max_cluster_culling_height = osg::maximum(max_cluster_culling_height,local_m);
max_cluster_culling_radius = osg::maximum(max_cluster_culling_radius,static_cast<float>(beta*globe_radius));
max_cluster_culling_radius = osg::maximum(max_cluster_culling_radius,local_radius);
}
else
{
@@ -2838,6 +2839,66 @@ std::string DataSet::CompositeDestination::getSubTileName()
return _name+"_subtile"+_dataSet->getDestinationTileExtension();
}
class CollectClusterCullingCallbacks : public osg::NodeVisitor
{
public:
struct Triple
{
Triple():
_drawable(0),
_callback(0) {}
Triple(osg::NodePath nodePath, osg::Drawable* drawable, osg::ClusterCullingCallback* callback):
_nodePath(nodePath),
_drawable(drawable),
_callback(callback) {}
Triple(const Triple& t):
_nodePath(t._nodePath),
_drawable(t._drawable),
_callback(t._callback) {}
Triple& operator = (const Triple& t)
{
_nodePath = t._nodePath;
_drawable = t._drawable;
_callback = t._callback;
return *this;
}
osg::NodePath _nodePath;
osg::Drawable* _drawable;
osg::ClusterCullingCallback* _callback;
};
typedef std::vector<Triple> ClusterCullingCallbackList;
CollectClusterCullingCallbacks():
osg::NodeVisitor(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN) {}
virtual void apply(osg::Geode& geode)
{
for(unsigned int i=0; i<geode.getNumDrawables();++i)
{
osg::ClusterCullingCallback* callback = dynamic_cast<osg::ClusterCullingCallback*>(geode.getDrawable(i)->getCullCallback());
if (callback)
{
_callbackList.push_back(Triple(getNodePath(),geode.getDrawable(i),callback));
}
else
{
osg::notify(osg::NOTICE)<<" Note found"<<geode.getDrawable(i)->getCullCallback()<<std::endl;
}
}
}
ClusterCullingCallbackList _callbackList;
};
osg::Node* DataSet::CompositeDestination::createPagedLODScene()
{
if (_children.empty() && _tiles.empty()) return 0;
@@ -2909,6 +2970,33 @@ osg::Node* DataSet::CompositeDestination::createPagedLODScene()
pagedLOD->addChild(group);
}
// find cluster culling callbacks on drawables and move them to the PagedLOD level.
{
CollectClusterCullingCallbacks collect;
pagedLOD->accept(collect);
if (!collect._callbackList.empty())
{
if (collect._callbackList.size()==1)
{
CollectClusterCullingCallbacks::Triple& triple = collect._callbackList.front();
osg::Matrixd matrix = osg::computeLocalToWorld(triple._nodePath);
triple._callback->transform(matrix);
osg::notify(osg::NOTICE)<<"cluster culling matrix "<<matrix<<std::endl;
// moving cluster culling callback pagedLOD node.
pagedLOD->setCullCallback(triple._callback);
// remove it from the drawable.
triple._drawable->setCullCallback(0);
}
}
}
// cutOffDistance = pagedLOD->getBound().radius()*_dataSet->getRadiusToMaxVisibleDistanceRatio();
pagedLOD->setRange(0,cutOffDistance,farDistance);