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);
}
}
