Changed osgpagedlod example to convert LOD nodes into PagedLOD ones.
This commit is contained in:
Robert Osfield
parent
5cfc42daf8
commit
d4a8bc0f03
@ -14,75 +14,7 @@
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#include <osgUtil/Optimizer>
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#include <iostream>
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osg::Geode* createTile(const osg::Vec3& lb, const osg::Vec3& rb,
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const osg::Vec3& lt, const osg::Vec3& rt,
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const std::string& imageFile)
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{
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// create the geometry.
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osg::Geometry* geom = new osg::Geometry;
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osg::Vec3Array* coords = new osg::Vec3Array(4);
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(*coords)[0] = lt;
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(*coords)[1] = lb;
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(*coords)[2] = rb;
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(*coords)[3] = rt;
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geom->setVertexArray(coords);
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osg::Vec2Array* tcoords = new osg::Vec2Array(4);
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(*tcoords)[0].set(0.0f,1.0f);
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(*tcoords)[1].set(0.0f,0.0f);
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(*tcoords)[2].set(1.0f,0.0f);
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(*tcoords)[3].set(1.0f,1.0f);
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geom->setTexCoordArray(0,tcoords);
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osg::Vec4Array* colours = new osg::Vec4Array(1);
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(*colours)[0].set(1.0f,1.0f,1.0,1.0f);
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geom->setColorArray(colours);
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geom->setColorBinding(osg::Geometry::BIND_OVERALL);
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osg::Vec3Array* normals = new osg::Vec3Array(1);
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(*normals)[0] = (rb-lb)^(lt-lb);
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(*normals)[0].normalize();
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geom->setNormalArray(normals);
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geom->setNormalBinding(osg::Geometry::BIND_OVERALL);
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geom->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::QUADS,0,4));
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// add the texture to the geometry.
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geom->getOrCreateStateSet()->setTextureAttributeAndModes(
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0, // texture unit 0.
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new osg::Texture2D(osgDB::readImageFile(imageFile)),
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osg::StateAttribute::ON);
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// create the geode.
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osg::Geode* geode = new osg::Geode;
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geode->addDrawable(geom);
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return geode;
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}
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osg::Node* createPagedModel()
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{
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osg::PagedLOD* level_0 = new osg::PagedLOD;
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float distance = 1000.0f;
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osg::Vec3 lb(0.0f,0.0f,0.0f);
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osg::Vec3 rb(distance,0.0f,0.0f);
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osg::Vec3 rt(distance,0.0f,distance);
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osg::Vec3 lt(0.0f,0.0f,distance);
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level_0->addChild(createTile(lb,rb,lt,rt,"lz.rgb"),distance,1e5,"");
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level_0->addChild(createTile(lb,rb,lt,rt,"land_shallow_topo_2048.jpg"),0,distance,"level_1.osg");
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return level_0;
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}
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#include <sstream>
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class WriteOutPagedLODSubgraphsVistor : public osg::NodeVisitor
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{
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@ -94,18 +26,122 @@ public:
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virtual void apply(osg::PagedLOD& plod)
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{
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// go through all the named children and write them out to disk.
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for(unsigned int i=0;i<plod.getNumChildren();++i)
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{
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osg::Node* child = plod.getChild(i);
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std::string filename = plod.getFileName(i);
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if (!filename.empty()) osgDB::writeNodeFile(*child,filename);
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if (!filename.empty())
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{
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osg::notify(osg::NOTICE)<<"Writing out "<<filename<<std::endl;
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osgDB::writeNodeFile(*child,filename);
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}
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}
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traverse(plod);
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}
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};
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class ConvertToPageLODVistor : public osg::NodeVisitor
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{
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public:
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ConvertToPageLODVistor(const std::string& basename, const std::string& extension):
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osg::NodeVisitor(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN),
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_basename(basename),
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_extension(extension)
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{
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}
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virtual ~ConvertToPageLODVistor()
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{
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}
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virtual void apply(osg::LOD& lod)
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{
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_lodSet.insert(&lod);
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traverse(lod);
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}
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virtual void apply(osg::PagedLOD& plod)
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{
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// do thing, but want to avoid call LOD.
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traverse(plod);
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}
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void convert()
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{
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unsigned int lodNum = 0;
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for(LODSet::iterator itr = _lodSet.begin();
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itr != _lodSet.end();
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++itr, ++lodNum)
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{
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osg::ref_ptr<osg::LOD> lod = const_cast<osg::LOD*>(itr->get());
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if (lod->getNumParents()==0)
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{
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osg::notify(osg::NOTICE)<<"Warning can't operator on root node."<<std::endl;
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break;
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}
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osg::notify(osg::NOTICE)<<"Converting LOD to PagedLOD"<<std::endl;
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osg::PagedLOD* plod = new osg::PagedLOD;
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const osg::LOD::RangeList& originalRangeList = lod->getRangeList();
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typedef std::map< osg::LOD::MinMaxPair , unsigned int > MinMaxPairMap;
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MinMaxPairMap rangeMap;
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unsigned int pos = 0;
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for(osg::LOD::RangeList::const_iterator ritr = originalRangeList.begin();
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ritr != originalRangeList.end();
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++ritr, ++pos)
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{
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rangeMap[*ritr] = pos;
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}
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pos = 0;
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for(MinMaxPairMap::reverse_iterator mitr = rangeMap.rbegin();
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mitr != rangeMap.rend();
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++mitr, ++pos)
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{
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if (pos==0)
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{
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plod->addChild(lod->getChild(mitr->second), mitr->first.first, mitr->first.second);
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osg::notify(osg::NOTICE)<<" adding staight child"<<std::endl;
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}
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else
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{
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std::string filename = _basename;
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std::ostringstream os;
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os << _basename << "_"<<lodNum<<"_"<<pos<<_extension;
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plod->addChild(lod->getChild(mitr->second), mitr->first.first, mitr->first.second, os.str());
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osg::notify(osg::NOTICE)<<" adding tiled subgraph"<<os.str()<<std::endl;
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}
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}
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osg::Node::ParentList parents = lod->getParents();
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for(osg::Node::ParentList::iterator pitr=parents.begin();
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pitr!=parents.end();
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++pitr)
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{
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(*pitr)->replaceChild(lod.get(),plod);
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}
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plod->setCenter(plod->getBound().center());
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plod->setCenter(plod->getBound().center());
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}
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}
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typedef std::set< osg::ref_ptr<osg::LOD> > LODSet;
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LODSet _lodSet;
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std::string _basename;
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std::string _extension;
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};
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int main( int argc, char **argv )
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@ -144,11 +180,21 @@ int main( int argc, char **argv )
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// }
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osg::ref_ptr<osg::Node> model = createPagedModel();
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osg::ref_ptr<osg::Node> model = osgDB::readNodeFiles(arguments);
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if (!model)
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{
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osg::notify(osg::NOTICE)<<"No model loaded."<<std::endl;
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return 1;
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}
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ConvertToPageLODVistor converter("tile",".ive");
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model->accept(converter);
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converter.convert();
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if (model.valid())
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{
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osgDB::writeNodeFile(*model,"level_0.osg");
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osgDB::writeNodeFile(*model,"tile.ive");
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WriteOutPagedLODSubgraphsVistor woplsv;
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model->accept(woplsv);
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