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Code Issues Releases Wiki Activity

Remove LOD which could never be displayed in a chunk

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This commit is contained in:
Cédric Mocquillon 2022-09-26 17:51:05 +02:00
parent 577c9ad5fb
commit 4140e4ea05
1 changed files with 49 additions and 13 deletions
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62
apps/openmw/mwrender/objectpaging.cpp
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@ -113,11 +113,31 @@ namespace MWRender
}
};
namespace
{
using LODRange = osg::LOD::MinMaxPair;
LODRange intersection(const LODRange& left, const LODRange& right)
{
return { std::max(left.first, right.first), std::min(left.second, right.second) };
}
bool empty(const LODRange& r)
{
return r.first >= r.second;
}
LODRange operator/(const LODRange& r, float div)
{
return { r.first / div, r.second / div };
}
}
class CopyOp : public osg::CopyOp
{
public:
bool mOptimizeBillboards = true;
float mSqrDistance = 0.f;
LODRange mDistances = { 0.f, 0.f };
osg::Vec3f mViewVector;
osg::Node::NodeMask mCopyMask = ~0u;
mutable std::vector<const osg::Node*> mNodePath;
@ -158,13 +178,28 @@ namespace MWRender
}
if (const osg::LOD* lod = dynamic_cast<const osg::LOD*>(node))
{
osg::Group* n = new osg::Group;
std::vector<std::pair<osg::ref_ptr<osg::Node>, LODRange>> children;
for (unsigned int i = 0; i < lod->getNumChildren(); ++i)
if (lod->getMinRange(i) * lod->getMinRange(i) <= mSqrDistance
&& mSqrDistance < lod->getMaxRange(i) * lod->getMaxRange(i))
n->addChild(operator()(lod->getChild(i)));
n->setDataVariance(osg::Object::STATIC);
return n;
if (const auto r = intersection(lod->getRangeList()[i], mDistances); !empty(r))
children.emplace_back(operator()(lod->getChild(i)), lod->getRangeList()[i]);
if (children.empty())
return nullptr;
if (children.size() == 1)
{
osg::Group* n = new osg::Group;
n->addChild(children.front().first);
n->setDataVariance(osg::Object::STATIC);
return n;
}
else
{
osg::LOD* n = new osg::LOD;
for (const auto& [child, range] : children)
n->addChild(child, range.first, range.second);
n->setDataVariance(osg::Object::STATIC);
return n;
}
}
if (const osg::Sequence* sq = dynamic_cast<const osg::Sequence*>(node))
{
@ -299,7 +334,6 @@ namespace MWRender
AnalyzeVisitor(osg::Node::NodeMask analyzeMask)
: osg::NodeVisitor(TRAVERSE_ALL_CHILDREN)
, mCurrentStateSet(nullptr)
, mCurrentDistance(0.f)
{
setTraversalMask(analyzeMask);
}
@ -326,8 +360,7 @@ namespace MWRender
if (osg::LOD* lod = dynamic_cast<osg::LOD*>(&node))
{
for (unsigned int i = 0; i < lod->getNumChildren(); ++i)
if (lod->getMinRange(i) * lod->getMinRange(i) <= mCurrentDistance
&& mCurrentDistance < lod->getMaxRange(i) * lod->getMaxRange(i))
if (const auto r = intersection(lod->getRangeList()[i], mDistances); !empty(r))
traverse(*lod->getChild(i));
return;
}
@ -375,7 +408,7 @@ namespace MWRender
Result mResult;
osg::StateSet* mCurrentStateSet;
StateSetCounter mGlobalStateSetCounter;
float mCurrentDistance;
LODRange mDistances = { 0.f, 0.f };
};
class DebugVisitor : public osg::NodeVisitor
@ -538,8 +571,10 @@ namespace MWRender
// Since ObjectPaging does not handle VisController, we can just ignore both types of nodes.
constexpr auto copyMask = ~Mask_UpdateVisitor;
const auto smallestDistanceToChunk = (size > 1 / 8.f) ? (size * ESM::Land::REAL_SIZE) : 0.f;
const auto higherDistanceToChunk = ((size < 1) ? 5 : 3) * ESM::Land::REAL_SIZE * size + 1;
AnalyzeVisitor analyzeVisitor(copyMask);
analyzeVisitor.mCurrentDistance = (viewPoint - worldCenter).length2();
float minSize = mMinSize;
if (mMinSizeMergeFactor)
minSize *= mMinSizeMergeFactor;
@ -634,6 +669,7 @@ namespace MWRender
auto emplaced = nodes.emplace(cnode, InstanceList());
if (emplaced.second)
{
analyzeVisitor.mDistances = LODRange{ smallestDistanceToChunk, higherDistanceToChunk } / ref.mScale;
const_cast<osg::Node*>(cnode.get())
->accept(
analyzeVisitor); // const-trickery required because there is no const version of NodeVisitor
@ -715,7 +751,7 @@ namespace MWRender
: osg::CopyOp::DEEP_COPY_NODES);
copyop.mOptimizeBillboards = (size > 1 / 4.f);
copyop.mNodePath.push_back(trans);
copyop.mSqrDistance = (viewPoint - pos).length2();
copyop.mDistances = LODRange{ smallestDistanceToChunk, higherDistanceToChunk } / ref.mScale;
copyop.mViewVector = (viewPoint - worldCenter);
copyop.copy(cnode, trans);
copyop.mNodePath.pop_back();