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Use quadtree to improve culling of STG objects

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This commit is contained in:
Stuart Buchanan
2015-10-29 20:07:12 +00:00
parent 1a752d28a4
commit 08fb433923
1 changed files with 62 additions and 36 deletions
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98
simgear/scene/tgdb/ReaderWriterSTG.cxx
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@@ -44,6 +44,7 @@
#include <simgear/misc/sgstream.hxx>
#include <simgear/scene/util/OptionsReadFileCallback.hxx>
#include <simgear/scene/util/OsgMath.hxx>
#include <simgear/scene/util/QuadTreeBuilder.hxx>
#include <simgear/scene/util/RenderConstants.hxx>
#include <simgear/scene/util/SGReaderWriterOptions.hxx>
#include <simgear/scene/tgdb/apt_signs.hxx>
@@ -113,48 +114,73 @@ struct ReaderWriterSTG::_ModelBin {
};
class DelayLoadReadFileCallback : public OptionsReadFileCallback {
private:
// QuadTreeBuilder for structuring static objects
struct MakeQuadLeaf {
osg::LOD* operator() () const { return new osg::LOD; }
};
struct AddModelLOD {
void operator() (osg::LOD* leaf, _ObjectStatic o) const
{
osg::ref_ptr<osg::Node> node;
if (o._proxy) {
osg::ref_ptr<osg::ProxyNode> proxy = new osg::ProxyNode;
proxy->setName("proxyNode");
proxy->setLoadingExternalReferenceMode(osg::ProxyNode::DEFER_LOADING_TO_DATABASE_PAGER);
proxy->setFileName(0, o._name);
proxy->setDatabaseOptions(o._options.get());
node = proxy;
} else {
node = osgDB::readRefNodeFile(o._name, o._options.get());
if (!node.valid()) {
SG_LOG(SG_TERRAIN, SG_ALERT, o._errorLocation << ": Failed to load "
<< o._token << " '" << o._name << "'");
return;
}
}
if (SGPath(o._name).lower_extension() == "ac")
node->setNodeMask(~simgear::MODELLIGHT_BIT);
osg::Matrix matrix;
matrix = makeZUpFrame(SGGeod::fromDegM(o._lon, o._lat, o._elev));
matrix.preMultRotate(osg::Quat(SGMiscd::deg2rad(o._hdg), osg::Vec3(0, 0, 1)));
matrix.preMultRotate(osg::Quat(SGMiscd::deg2rad(o._pitch), osg::Vec3(0, 1, 0)));
matrix.preMultRotate(osg::Quat(SGMiscd::deg2rad(o._roll), osg::Vec3(1, 0, 0)));
osg::MatrixTransform* matrixTransform;
matrixTransform = new osg::MatrixTransform(matrix);
matrixTransform->setName("rotateStaticObject");
matrixTransform->setDataVariance(osg::Object::STATIC);
matrixTransform->addChild(node.get());
leaf->addChild(matrixTransform, 0, 20000); //TODO: Make configurable?
}
};
struct GetModelLODCoord {
GetModelLODCoord() {}
GetModelLODCoord(const GetModelLODCoord& rhs)
{}
osg::Vec3 operator() (const _ObjectStatic& o) const
{
SGVec3d coord;
SGGeodesy::SGGeodToCart(SGGeod::fromDegM(o._lon, o._lat, o._elev), coord);
return toOsg(coord);
}
};
typedef QuadTreeBuilder<osg::LOD*, _ObjectStatic, MakeQuadLeaf, AddModelLOD,
GetModelLODCoord> STGObjectsQuadtree;
public:
virtual osgDB::ReaderWriter::ReadResult
readNode(const std::string&, const osgDB::Options*)
{
osg::ref_ptr<osg::Group> group = new osg::Group;
STGObjectsQuadtree quadtree((GetModelLODCoord()), (AddModelLOD()));
quadtree.buildQuadTree(_objectStaticList.begin(), _objectStaticList.end());
osg::ref_ptr<osg::Group> group = quadtree.getRoot();
group->setName("STG-group-A");
group->setDataVariance(osg::Object::STATIC);
for (std::list<_ObjectStatic>::iterator i = _objectStaticList.begin(); i != _objectStaticList.end(); ++i) {
osg::ref_ptr<osg::Node> node;
if (i->_proxy) {
osg::ref_ptr<osg::ProxyNode> proxy = new osg::ProxyNode;
proxy->setName("proxyNode");
proxy->setLoadingExternalReferenceMode(osg::ProxyNode::DEFER_LOADING_TO_DATABASE_PAGER);
proxy->setFileName(0, i->_name);
proxy->setDatabaseOptions(i->_options.get());
node = proxy;
} else {
node = osgDB::readRefNodeFile(i->_name, i->_options.get());
if (!node.valid()) {
SG_LOG(SG_TERRAIN, SG_ALERT, i->_errorLocation << ": Failed to load "
<< i->_token << " '" << i->_name << "'");
continue;
}
}
if (SGPath(i->_name).lower_extension() == "ac")
node->setNodeMask(~simgear::MODELLIGHT_BIT);
osg::Matrix matrix;
matrix = makeZUpFrame(SGGeod::fromDegM(i->_lon, i->_lat, i->_elev));
matrix.preMultRotate(osg::Quat(SGMiscd::deg2rad(i->_hdg), osg::Vec3(0, 0, 1)));
matrix.preMultRotate(osg::Quat(SGMiscd::deg2rad(i->_pitch), osg::Vec3(0, 1, 0)));
matrix.preMultRotate(osg::Quat(SGMiscd::deg2rad(i->_roll), osg::Vec3(1, 0, 0)));
osg::MatrixTransform* matrixTransform;
matrixTransform = new osg::MatrixTransform(matrix);
matrixTransform->setName("positionStaticObject");
matrixTransform->setDataVariance(osg::Object::STATIC);
matrixTransform->addChild(node.get());
group->addChild(matrixTransform);
}
simgear::AirportSignBuilder signBuilder(_options->getMaterialLib(), _bucket.get_center());
for (std::list<_Sign>::iterator i = _signList.begin(); i != _signList.end(); ++i)
signBuilder.addSign(SGGeod::fromDegM(i->_lon, i->_lat, i->_elev), i->_hdg, i->_name, i->_size);