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);
}
}
void
FltExportVisitor::apply( osg::MatrixTransform& node )
{
// Importer reads a Matrix record and inserts a MatrixTransform above
// the current node. We need to do the opposite: Write a Matrix record
// as an ancillary record for each child. We do that by storing the
// MatrixTransform in each child's UserData. Each child then checks
// UserData and writes a Matrix record if UserData is a MatrixTransform.
_firstNode = false;
ScopedStatePushPop guard( this, node.getStateSet() );
osg::ref_ptr< osg::RefMatrix > m = new osg::RefMatrix;
m->set( node.getMatrix() );
if (node.getUserData())
{
const osg::RefMatrix* rm = dynamic_cast<const osg::RefMatrix*>( node.getUserData() );
if (rm)
(*m) *= *rm;
}
typedef std::vector< osg::ref_ptr< osg::Referenced > > UserDataList;
UserDataList saveUserDataList( node.getNumChildren() );
unsigned int idx;
for( idx=0; idx<node.getNumChildren(); ++idx )
{
saveUserDataList[ idx ] = node.getChild( idx )->getUserData();
node.getChild( idx )->setUserData( m.get() );
}
traverse( (osg::Node&)node );
// Restore saved UserData.
for( idx=0; idx< node.getNumChildren(); ++idx )
{
node.getChild( idx )->setUserData( saveUserDataList[ idx ].get() );
}
}