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Terrain: take cell world size into account for LOD selection

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scrawl 2014-02-18 12:27:22 +01:00
parent 065b6d3331
commit b3fed853ae
1 changed files with 16 additions and 14 deletions
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30
components/terrain/quadtreenode.cpp
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@ -171,7 +171,7 @@ QuadTreeNode::QuadTreeNode(World* terrain, ChildDirection dir, float size, const
float cellWorldSize = mTerrain->getStorage()->getCellWorldSize();
Ogre::Vector3 sceneNodePos (pos.x*cellWorldSize, pos.y*cellWorldSize, 0);
mTerrain->convertPosition(sceneNodePos.x, sceneNodePos.y, sceneNodePos.z);
mTerrain->convertPosition(sceneNodePos);
mSceneNode->setPosition(sceneNodePos);
@ -274,21 +274,23 @@ void QuadTreeNode::update(const Ogre::Vector3 &cameraPos)
mParent->getSceneNode()->addChild(mSceneNode);
}
/// \todo implement error metrics or some other means of not using arbitrary values
/// (general quality needs to be user configurable as well)
// Simple LOD selection
/// \todo use error metrics?
size_t wantedLod = 0;
if (dist > 8192*1)
wantedLod = 1;
if (dist > 8192*2)
wantedLod = 2;
if (dist > 8192*5)
wantedLod = 3;
if (dist > 8192*12)
wantedLod = 4;
if (dist > 8192*32)
wantedLod = 5;
if (dist > 8192*64)
float cellWorldSize = mTerrain->getStorage()->getCellWorldSize();
if (dist > cellWorldSize*64)
wantedLod = 6;
else if (dist > cellWorldSize*32)
wantedLod = 5;
else if (dist > cellWorldSize*12)
wantedLod = 4;
else if (dist > cellWorldSize*5)
wantedLod = 3;
else if (dist > cellWorldSize*2)
wantedLod = 2;
else if (dist > cellWorldSize)
wantedLod = 1;
bool hadChunk = hasChunk();