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Experiments at fixing seam handling.

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This commit is contained in:
Robert Osfield
2004-01-04 22:28:37 +00:00
parent d25b682269
commit c71e2100ec
2 changed files with 69 additions and 10 deletions
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52
src/osgPlugins/txp/TXPSeamLOD.cpp
View File

@@ -45,18 +45,56 @@ void TXPSeamLOD::traverse(osg::NodeVisitor& nv)
{
if (nv.getVisitorType()==osg::NodeVisitor::CULL_VISITOR && _children.size()==2)
{
float distance = nv.getDistanceToEyePoint(_center,true);
if (distance<_mid)
#if 1
osg::PagedLOD* pagedLOD = TileMapper::instance()->getPagedLOD(_neighbourTileX,_neighbourTileY, _neighbourTileLOD);
if (pagedLOD)
{
// cap the lod's that can be used to what is available in the adjacent PagedLOD.
osg::PagedLOD* pagedLOD = TileMapper::instance()->getPagedLOD(_neighbourTileX,_neighbourTileY, _neighbourTileLOD);
if (pagedLOD && pagedLOD->getNumChildren()>1) getChild(1)->accept(nv);
else getChild(0)->accept(nv);
float distance = nv.getDistanceToEyePoint(_center,true);
distance = nv.getDistanceToEyePoint(pagedLOD->getCenter(),true);
//std::cout<<"distance to eye from center = "<<distance<<" min = "<< _min<<" mid = "<< _mid << " max = "<<_max<<std::endl;
//std::cout<<" TXPSeam::_center "<<_center<<" PageLOD::_center "<<pagedLOD->getCenter()<<std::endl;
int numChildren = osg::minimum(getNumChildren(),pagedLOD->getNumChildren());
for(int i=numChildren-1;i>=0;--i)
{
//std::cout<<" child "<<i<<" range = min "<<pagedLOD->getMinRange(i)<<" max = "<<pagedLOD->getMaxRange(i)<<std::endl;
if (distance<=pagedLOD->getMaxRange(i))
{
getChild(i)->accept(nv);
return;
}
}
}
else
{
getChild(0)->accept(nv);
getChild(0)->accept(nv); // pick low res
}
#else
float distance = nv.getDistanceToEyePoint(_center,true);
if (distance<=_mid)
{
// cap the lod's that can be used to what is available in the adjacent PagedLOD.
//std::cout<<"distance to eye from center = "<<distance<<" min = "<< _min<<" mid = "<< _mid << " max = "<<_max<<std::endl;
if (pagedLOD)
{
//std::cout<<" in cull pagedLOD="<<pagedLOD<<" numChildren=="<<pagedLOD->getNumChildren()<<std::endl;
for(unsigned int i=0;i<pagedLOD->getNumChildren();++i)
{
//std::cout<<" child "<<i<<" range = min "<<pagedLOD->getMinRange(i)<<" max = "<<pagedLOD->getMaxRange(i)<<std::endl;
}
}
if (pagedLOD && pagedLOD->getNumChildren()>1) getChild(1)->accept(nv); // pick high res
else getChild(0)->accept(nv); // pick low res as fallback
}
else
{
getChild(0)->accept(nv); // pick low res
}
#endif
}
else
{

27
src/osgPlugins/txp/TXPTileNode.cpp
View File

@@ -125,10 +125,31 @@ osg::Node* TXPTileNode::seamReplacement(osg::Node* child,int x, int y, int level
}
}
TXPSeamLOD* seam = new TXPSeamLOD(x,y,level,lod1->getCenter(),lod2->getMinRange(0),lod2->getMaxRange(0),lod1->getMaxRange(0));
// std::cout<<"seamReplacement lod1 min="<<lod1->getMinRange(0)<<" max="<<lod1->getMaxRange(0)<<std::endl;
// std::cout<<" lod2 min="<<lod2->getMinRange(0)<<" max="<<lod2->getMaxRange(0)<<std::endl;
if (lod1->getMaxRange(0)<lod2->getMaxRange(0))
{
// std::cout<<" lod1 is high res, lod2 is low res."<<std::endl;
}
else if (lod1->getMaxRange(0)==lod2->getMaxRange(0))
{
// std::cout<<" lod1 and lod2 range equal. ****************"<<std::endl;
// don't replace with seam LOD node, leave as a standard LOD.
return 0;
}
else
{
// std::cout<<" lod1 is low res, lod2 is high res. --------------"<<std::endl;
// don't replace with seam LOD node, leave as a standard LOD
return 0;
}
TXPSeamLOD* seam = new TXPSeamLOD(x,y,level,lod1->getCenter(),lod1->getMinRange(0),lod1->getMaxRange(0),lod2->getMaxRange(0));
seam->setArchive(_archive);
seam->addChild(lod1->getChild(0));
seam->addChild(lod2->getChild(0));
seam->addChild(lod1->getChild(0)); // high res
seam->addChild(lod2->getChild(0)); // low res
return seam;
}
}