FGFS-4.1/OpenSceneGraph
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Converted osg::LOD from used n+1 successive ranges to n min/max ranges,

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one min/max pair per child. Converted the rest of the OSG to use the new
osg::LOD node.
This commit is contained in:
Robert Osfield
2002-10-06 20:33:13 +00:00
parent 84332f5b77
commit 70861ef70e
19 changed files with 240 additions and 195 deletions
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39
src/osgUtil/Optimizer.cpp
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@@ -24,13 +24,12 @@ using namespace osgUtil;
void Optimizer::optimize(osg::Node* node, unsigned int options)
{
// temporarily commented out to prevent problems with combining FLT lod's inapporpriately,
// if (options & COMBINE_ADJACENT_LODS)
// {
// CombineLODsVisitor clv;
// node->accept(clv);
// clv.combineLODs();
// }
if (options & COMBINE_ADJACENT_LODS)
{
CombineLODsVisitor clv;
node->accept(clv);
clv.combineLODs();
}
if (options & FLATTEN_STATIC_TRANSFORMS)
{
@@ -560,7 +559,7 @@ void CollectLowestTransformsVisitor::doTransform(osg::Object* obj,osg::Matrix& m
// adjust ranges to new scale.
for(unsigned int i=0;i<lod->getNumRanges();++i)
{
lod->setRange(i,lod->getRange(i)*ratio);
lod->setRange(i,lod->getMinRange(i)*ratio,lod->getMaxRange(i)*ratio);
}
lod->dirtyBound();
@@ -968,14 +967,7 @@ void Optimizer::CombineLODsVisitor::combineLODs()
osg::LOD* lod = dynamic_cast<osg::LOD*>(child);
if (lod)
{
if (lod->getNumRanges()-1==lod->getNumChildren())
{
lodChildren.insert(lod);
}
else
{
// wonky LOD, numRanges should = numChildren+1
}
lodChildren.insert(lod);
}
}
@@ -983,29 +975,29 @@ void Optimizer::CombineLODsVisitor::combineLODs()
{
osg::BoundingBox bb;
LODSet::iterator lod_itr;
float smallestRadius=FLT_MAX;
for(lod_itr=lodChildren.begin();
lod_itr!=lodChildren.end();
++lod_itr)
{
float r = (*lod_itr)->getBound().radius();
if (r>=0 && r<smallestRadius) smallestRadius = r;
bb.expandBy((*lod_itr)->getCenter());
}
if (bb.radius()<1e-2)
if (bb.radius()<smallestRadius*0.1f)
{
typedef std::pair<float,float> RangePair;
typedef std::multimap<RangePair,osg::Node*> RangeMap;
RangeMap rangeMap;
float maxRange = 0.0f;
for(lod_itr=lodChildren.begin();
lod_itr!=lodChildren.end();
++lod_itr)
{
osg::LOD* lod = *lod_itr;
for(unsigned int i=0;i<lod->getNumRanges()-1;++i)
for(unsigned int i=0;i<lod->getNumRanges();++i)
{
if (maxRange<lod->getRange(i+1)) maxRange = lod->getRange(i+1);
rangeMap.insert(RangeMap::value_type(RangePair(lod->getRange(i),lod->getRange(i+1)),lod->getChild(i)));
rangeMap.insert(RangeMap::value_type(RangePair(lod->getMinRange(i),lod->getMaxRange(i)),lod->getChild(i)));
}
}
@@ -1020,10 +1012,9 @@ void Optimizer::CombineLODsVisitor::combineLODs()
c_itr!=rangeMap.end();
++c_itr,++i)
{
newLOD->setRange(i,c_itr->first.first);
newLOD->setRange(i,c_itr->first.first,c_itr->first.second);
newLOD->addChild(c_itr->second);
}
newLOD->setRange(i,maxRange);
// add LOD into parent.
group->addChild(newLOD);