void TXPArchive::getExtents(osg::BoundingBox& extents)
{
TileInfo sw, ne;
trpg2iPoint tileExtents;
this->GetHeader()->GetLodSize(0, tileExtents);
this->getTileInfo(0, 0, 0, sw);
this->getTileInfo(tileExtents.x-1, tileExtents.y-1, 0, ne);
extents.set(sw.bbox._min, sw.bbox._max);
extents.expandBy(ne.bbox);
}
void ComputeBoundingBoxByRotation(osg::BoundingBox & InOut,osg::Vec3 BBCenter,float BBSize,osg::Matrixd Rotation)
{
osg::BoundingBox bb;
bb.set(BBCenter.x()-BBSize,BBCenter.y()-BBSize,BBCenter.z()-BBSize,BBCenter.x()+BBSize,BBCenter.y()+BBSize,BBCenter.z()+BBSize);
osg::BoundingBox Tbb;
for(unsigned int i=0;i<8;i++)
{
Tbb.expandBy(Rotation.preMult(bb.corner(i)));
}
InOut.set(Tbb.xMin(),Tbb.yMin(),Tbb.zMin(),Tbb.xMax(),Tbb.yMax(),Tbb.zMax());
}
bool GetBoundingBox(osg::BoundingBox & BB, dtCore::DeltaDrawable & drawable)
{
osg::Node* node = drawable.GetOSGNode();
if (node != 0)
{
dtUtil::BoundingBoxVisitor bbv;
node->accept(bbv);
// no copy constructor for osg::BB...
BB.set(bbv.mBoundingBox._min, bbv.mBoundingBox._max);
return true;
}
LOG_WARNING("No valid osg node of drawable when asking for bounding box.");
return false;
}