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WS30 Move VPB tile loading to the tile manager

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Previously VPB tiles were loaded by the STG file handler.
Now they are loaded directly by the tile manager, allowing
better management of tile loading.
This commit is contained in:
Stuart Buchanan 2021-10-20 23:37:59 +01:00
parent fc1d02110c
commit 7916dfb61d
3 changed files with 14 additions and 26 deletions
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14
simgear/bucket/newbucket.hxx
View File

@ -182,6 +182,20 @@ public:
return ((lon + 180) << 14) + ((lat + 90) << 6) + static_cast<unsigned char>(y << 3) + x;
}
/**
* Generate a tile index for this bucket shared with all other buckets with the same lat/lon.
* Used as an index for VPB tiles, which are 1x1 in size.
*
* The index is constructed as follows:
*
* 9 bits - to represent 360 degrees of longitude (-180 to 179)
* 8 bits - to represent 180 degrees of latitude (-90 to 89)
* @return tile index
*/
inline long int gen_vpb_index() const {
return ((lon + 180) << 8) + (lat + 90);
}
/**
* Generate the unique scenery tile index for this bucket in ascii
* string form.

22
simgear/scene/tgdb/ReaderWriterSTG.cxx
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@ -765,7 +765,6 @@ struct ReaderWriterSTG::_ModelBin {
osg::Node* load(const SGBucket& bucket, const osgDB::Options* opt)
{
osg::ref_ptr<SGReaderWriterOptions> options;
osg::ref_ptr<osg::Node> vpb_node;
options = SGReaderWriterOptions::copyOrCreate(opt);
float pagedLODExpiry = atoi(options->getPluginStringData("SimGear::PAGED_LOD_EXPIRY").c_str());
@ -819,27 +818,6 @@ struct ReaderWriterSTG::_ModelBin {
VPBTechnique::addCoastlineList(bucket, coastFeatures);
}
std::string filename = "vpb/" + bucket.gen_vpb_base() + ".osgb";
// Lock for this scope
{
const std::lock_guard<std::mutex> lock(ReaderWriterSTG::_tileMapMutex);
if (_tileMap.count(filename) == 0) {
vpb_node = osgDB::readRefNodeFile(filename, options);
if (!vpb_node.valid()) {
SG_LOG(SG_TERRAIN, SG_WARN, "Failure to load: " <<filename);
}
else {
terrainGroup->addChild(vpb_node);
_tileMap[filename] = vpb_node;
SG_LOG(SG_TERRAIN, SG_INFO, "Loading: " << filename);
}
} else {
vpb_node = _tileMap[filename];
}
}
// OBJECTs include airports
for (auto stgObject : _objectList) {
osg::ref_ptr<osg::Node> node;

4
simgear/scene/tgdb/ReaderWriterSTG.hxx
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@ -50,10 +50,6 @@ public:
static void removeSTGObjectHandler(const std::string &token, STGObjectCallback callback);
private:
struct _ModelBin;
inline static std::map<std::string, osg::ref_ptr<osg::Node> > _tileMap;
inline static std::mutex _tileMapMutex; // protects the _lineFeatureLists;
};
}