FGFS-4.1/simgear
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QuadTree fix for large buildings.

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QuadTree relies on a bounding box to set up correctly.

ProxyNodes don't have a BB until the model is loaded,
causing the QuadTree to collapse if the DB loader can't
keep up with the STG loader.

Fix this by creating a default BB before the model
is loaded.
This commit is contained in:
Stuart Buchanan 2015-11-06 21:38:53 +00:00
parent 319922f044
commit 21e6dd34b2
1 changed files with 7 additions and 1 deletions
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8
simgear/scene/tgdb/ReaderWriterSTG.cxx
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@ -130,6 +130,12 @@ struct ReaderWriterSTG::_ModelBin {
proxy->setLoadingExternalReferenceMode(osg::ProxyNode::DEFER_LOADING_TO_DATABASE_PAGER);
proxy->setFileName(0, o._name);
proxy->setDatabaseOptions(o._options.get());
// Give the node some values so the Quadtree builder has
// a BoundingBox to work with prior to the model being loaded.
proxy->setCenter(osg::Vec3f(0.0f,0.0f,0.0f));
proxy->setRadius(10);
proxy->setCenterMode(osg::ProxyNode::UNION_OF_BOUNDING_SPHERE_AND_USER_DEFINED);
node = proxy;
} else {
node = osgDB::readRefNodeFile(o._name, o._options.get());
@ -292,7 +298,7 @@ struct ReaderWriterSTG::_ModelBin {
// read a line
std::string line;
std::getline(stream, line);
// strip comments
std::string::size_type hash_pos = line.find('#');
if (hash_pos != std::string::npos)