void
FltExportVisitor::apply( osg::LOD& lodNode )
{
_firstNode = false;
ScopedStatePushPop guard( this, lodNode.getStateSet() );
// LOD center - same for all children
osg::Vec3d center = lodNode.getCenter();
// Iterate children of the LOD and write a separate LOD record for each,
// with that child's individual switchIn and switchOut properties
for ( size_t i = 0; i < lodNode.getNumChildren(); ++i )
{
osg::Node* lodChild = lodNode.getChild(i);
// Switch-in/switch-out distances may vary per child
double switchInDist = lodNode.getMaxRange(i);
double switchOutDist = lodNode.getMinRange(i);
writeLevelOfDetail( lodNode, center, switchInDist, switchOutDist);
writeMatrix( lodNode.getUserData() );
writeComment( lodNode );
// Traverse each child of the LOD
writePushTraverseWritePop( *lodChild );
}
}
static bool writeUserCenter( osgDB::OutputStream& os, const osg::LOD& node )
{
os << osg::Vec3d(node.getCenter()) << (double)node.getRadius() << std::endl;
return true;
}
void daeWriter::apply( osg::LOD &node )
{
debugPrint( node );
updateCurrentDaeNode();
lastDepth = _nodePath.size();
currentNode = daeSafeCast< domNode >(currentNode->add( COLLADA_ELEMENT_NODE ) );
currentNode->setId(getNodeName(node,"LOD").c_str());
if (writeExtras)
{
// Store LOD data as extra "LOD" data in the "OpenSceneGraph" technique
// Adds the following to a node
//<extra type="LOD">
// <technique profile="OpenSceneGraph">
// <Center>1 2 3</Center> (optional )
// <Radius>-1</Radius> (required if Center is available)
// <RangeMode>0</RangeMode>
// <RangeList>
// <MinMax>0 300</MinMax>
// <MinMax>300 600</MinMax>
// </RangeList>
// </technique>
//</extra>
domExtra *extra = daeSafeCast<domExtra>(currentNode->add( COLLADA_ELEMENT_EXTRA ));
extra->setType("LOD");
domTechnique *teq = daeSafeCast<domTechnique>(extra->add( COLLADA_ELEMENT_TECHNIQUE ) );
teq->setProfile( "OpenSceneGraph" );
if (node.getCenterMode()==osg::LOD::USER_DEFINED_CENTER)
{
domAny *center = (domAny*)teq->add("Center");
center->setValue(toString(node.getCenter()).c_str());
domAny *radius = (domAny*)teq->add("Radius");
radius->setValue(toString<osg::LOD::value_type>(node.getRadius()).c_str());
}
domAny *rangeMode = (domAny*)teq->add("RangeMode");
rangeMode->setValue(toString<osg::LOD::RangeMode>(node.getRangeMode()).c_str());
domAny *valueLists = (domAny*)teq->add("RangeList");
unsigned int pos = 0;
const osg::LOD::RangeList& rangelist = node.getRangeList();
for(osg::LOD::RangeList::const_iterator sitr=rangelist.begin();
sitr!=rangelist.end();
++sitr,++pos)
{
domAny *valueList = (domAny*)valueLists->add("MinMax");
std::stringstream fw;
fw << sitr->first << " " << sitr->second;
valueList->setValue(fw.str().c_str());
}
}
writeNodeExtra(node);
// Process all children
traverse( node );
}