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Fixed PagedLOD's handling of distances beyond the furthest range.

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This commit is contained in:
Robert Osfield
2003-12-20 23:25:05 +00:00
parent b890c8b97c
commit 315065df24
1 changed files with 19 additions and 12 deletions
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31
src/osg/PagedLOD.cpp
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@@ -33,28 +33,35 @@ void PagedLOD::traverse(NodeVisitor& nv)
case(NodeVisitor::TRAVERSE_ACTIVE_CHILDREN):
{
float distance = nv.getDistanceToEyePoint(getCenter(),true);
// first check to see if any children can be directly traversed.
unsigned int numChildren = minimum(_children.size(),
_rangeList.size());
bool childTraversed = false;
for(unsigned int i=0;i<numChildren;++i)
int lastChildTraversed = -1;
bool needToLoadChild = false;
for(unsigned int i=0;i<_rangeList.size();++i)
{
if (_rangeList[i].first<=distance && distance<_rangeList[i].second)
{
if (updateTimeStamp) _timeStampList[i]=timeStamp;
if (i<_children.size())
{
if (updateTimeStamp) _timeStampList[i]=timeStamp;
//std::cout<<"PagedLOD::traverse() - Selecting child "<<i<<std::endl;
_children[i]->accept(nv);
childTraversed = true;
//std::cout<<"PagedLOD::traverse() - Selecting child "<<i<<std::endl;
_children[i]->accept(nv);
lastChildTraversed = (int)i;
}
else
{
needToLoadChild = true;
}
}
}
if (!childTraversed)
if (needToLoadChild)
{
unsigned int numChildren = _children.size();
//std::cout<<"PagedLOD::traverse() - falling back "<<std::endl;
// select the last valid child.
if (numChildren>0)
if (numChildren>0 && ((int)numChildren-1)!=lastChildTraversed)
{
//std::cout<<" to child "<<numChildren-1<<std::endl;
if (updateTimeStamp) _timeStampList[numChildren-1]=timeStamp;