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Use the quad tree's minSize in the LodCallback

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This commit is contained in:
scrawl 2017-03-12 22:39:53 +01:00
parent c22fde2bcd
commit a041546b54
1 changed files with 12 additions and 4 deletions
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16
components/terrain/quadtreeworld.cpp
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@ -72,14 +72,22 @@ namespace Terrain
class DefaultLodCallback : public LodCallback
{
public:
DefaultLodCallback(float minSize)
: mMinSize(minSize)
{
}
virtual bool isSufficientDetail(QuadTreeNode* node, const osg::Vec3f& eyePoint)
{
float dist = distance(node->getBoundingBox(), eyePoint);
int nativeLodLevel = Log2(static_cast<unsigned int>(node->getSize()*4));
int lodLevel = Log2(static_cast<unsigned int>(dist/2048.0));
int nativeLodLevel = Log2(static_cast<unsigned int>(node->getSize()/mMinSize));
int lodLevel = Log2(static_cast<unsigned int>(dist/(8192*mMinSize)));
return nativeLodLevel <= lodLevel;
}
private:
float mMinSize;
};
class RootNode : public QuadTreeNode
@ -135,7 +143,7 @@ public:
mRootNode = new RootNode(size, osg::Vec2f(centerX, centerY));
mRootNode->setViewDataMap(mViewDataMap);
mRootNode->setLodCallback(new DefaultLodCallback);
mRootNode->setLodCallback(new DefaultLodCallback(mMinSize));
addChildren(mRootNode);
mRootNode->initNeighbours();
@ -177,7 +185,7 @@ public:
}
osg::ref_ptr<QuadTreeNode> node = new QuadTreeNode(parent, direction, size, center);
node->setLodCallback(new DefaultLodCallback);
node->setLodCallback(parent->getLodCallback());
node->setViewDataMap(mViewDataMap);
parent->addChild(node);