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 );
}
}
void apply(osg::LOD& lod)
{
// find the highest LOD:
int minIndex = 0;
float minRange = FLT_MAX;
for(unsigned i=0; i<lod.getNumRanges(); ++i)
{
if ( lod.getRangeList()[i].first < minRange )
{
minRange = lod.getRangeList()[i].first;
minIndex = i;
}
}
//remove all but the highest:
osg::ref_ptr<osg::Node> highestLOD = lod.getChild( minIndex );
lod.removeChildren( 0, lod.getNumChildren() );
//add it back with a full range.
lod.addChild( highestLOD.get(), 0.0f, FLT_MAX );
traverse(lod);
}