virtual void apply(osg::MatrixTransform& xform)
{
const trpgHeader* header = _archive->GetHeader();
trpgHeader::trpgTileType tileType;
header->GetTileOriginType(tileType);
const osg::Referenced* ref = xform.getUserData();
const TileIdentifier* tileID = dynamic_cast<const txp::TileIdentifier*>(ref);
if(!tileID) return; // bail early - this isn't a loaded model
if(tileType == trpgHeader::TileLocal && tileID->lod == 9999)
{
trpg2dPoint tileExtents;
header->GetTileSize(0, tileExtents);
osg::BoundingBox bbox;
_archive->getExtents(bbox);
osg::Vec3 offset(xform.getMatrix().getTrans());
offset[0] -= bbox._min[0];
offset[1] -= bbox._min[1];
trpg2dPoint offsetXY, tileID(_tileInfo.x,_tileInfo.y);
int divider = (0x01 << _tileInfo.lod);
// calculate which tile model is located in
tileExtents.x /= divider;
tileExtents.y /= divider;
offset[0] -= tileID.x*tileExtents.x;
offset[1] -= tileID.y*tileExtents.y;
osg::Matrix mat(xform.getMatrix());
mat.setTrans(offset);
xform.setMatrix(mat);
}
}
osg::Node* SeamFinder::seamReplacement(osg::Node* node)
{
osg::Group* group = node->asGroup();
if ( group == 0 )
return node;
std::vector<osg::Node*> nonSeamChildren;
osg::LOD* hiRes = 0;
osg::LOD* loRes = 0;
const trpgHeader* header = _archive->GetHeader();
trpgHeader::trpgTileType tileType;
header->GetTileOriginType(tileType);
for (unsigned int i = 0; i < group->getNumChildren(); i++)
{
osg::LOD* lod = dynamic_cast<osg::LOD*>(group->getChild(i));
if (lod == 0)
{
nonSeamChildren.push_back(group->getChild(i));
continue;
}
bool nonSeamChild = true;
// looks like the problem is in here - likely due to seamLOD info
// not being adjusted properly in tiled databases
// seam center is outside the bounding box of the tile
osg::Vec3 lodCenter = lod->getCenter();
if(tileType == trpgHeader::TileLocal)
{
trpg2dPoint tileExtents;
header->GetTileSize(0, tileExtents);
osg::BoundingBox bbox;
_archive->getExtents(bbox);
osg::Vec3 offset(0.0, 0.0, 0.0);
int divider = (0x1 << _lod);
// calculate which tile model is located in
tileExtents.x /= divider;
tileExtents.y /= divider;
offset[0] = _x*tileExtents.x;// + tileExtents.x*0.5;
offset[1] = _y*tileExtents.y;// + tileExtents.y*0.5;
lodCenter += offset;
}
if (!_info.bbox.contains(lodCenter))
{
const osg::LOD::RangeList& rangeList = lod->getRangeList();
if (!rangeList.size())
{
// TODO: Warn here
continue;
}
TXPArchive::TileInfo lod_plus_one_info;
if (!this->_archive->getTileInfo(_x,_y,_lod+1,lod_plus_one_info))
{
// TODO: Warn here
continue;
}
double lod_plus_oneSwitchInDistance = lod_plus_one_info.maxRange;
double lod0SwitchInDistance = _info.lod0Range;
// low res seam has min/max ranges of lod+1 range/lod 0 range
if (equalDoubles(lod_plus_oneSwitchInDistance,rangeList.at(0).first) && equalDoubles(lod0SwitchInDistance,rangeList.at(0).second))
{
if (loRes==0)
{
loRes = lod;
nonSeamChild = false;
}
}
else
// hi res seam has min/max ranges of 0 range/lod+1 range
if (rangeList.at(0).first==0.0 && equalDoubles(lod_plus_oneSwitchInDistance,rangeList.at(0).second))
{
if (hiRes==0)
{
hiRes = lod;
nonSeamChild = false;
}
}
}
if (nonSeamChild)
{
nonSeamChildren.push_back(lod);
}
}
if (loRes)
{
int dx = 0;
int dy = 0;
int lod = _lod;
osg::Vec3 lodCenter = loRes->getCenter();
if(tileType == trpgHeader::TileLocal)
{
trpg2dPoint tileExtents;
header->GetTileSize(0, tileExtents);
osg::BoundingBox bbox;
_archive->getExtents(bbox);
osg::Vec3 offset(0.0, 0.0, 0.0);
int divider = (0x1 << _lod);
// calculate which tile model is located in
tileExtents.x /= divider;
tileExtents.y /= divider;
offset[0] = _x*tileExtents.x;// + tileExtents.x*0.5;
offset[1] = _y*tileExtents.y;// + tileExtents.y*0.5;
lodCenter += offset;
}
osg::Vec3 delta = lodCenter-_info.center;
if (fabs(delta.x())>fabs(delta.y()))
{
if ( delta.x() < 0.0 )
--dx; // west
else
dx++; // east
}
else
{
if ( delta.y() < 0.0 )
--dy; // south
else
++dy; // north
}
TXPSeamLOD* seam = new TXPSeamLOD(_x, _y, lod, dx, dy);
seam->setCenter(loRes->getCenter());
seam->addChild(loRes->getChild(0)); // low res
if (hiRes)
{
seam->addChild(hiRes->getChild(0)); // high res
}
if (nonSeamChildren.empty())
{
return seam;
}
else
{
osg::Group* newGroup = new osg::Group;
newGroup->addChild(seam);
for (unsigned int i = 0; i < nonSeamChildren.size(); i++)
newGroup->addChild(nonSeamChildren[i]);
return newGroup;
}
}
return node;
}
