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stg: Defer loading models into a paged lod node.

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This defers loading the models into a paged lod node
that is evaluated at a later point in time. That should
help for memory problems with higher visibilities.
This commit is contained in:
Mathias Froehlich
2013-02-24 13:03:06 +01:00
parent 328e6b3e28
commit 49162a7a64
1 changed files with 86 additions and 49 deletions
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135
simgear/scene/tgdb/ReaderWriterSTG.cxx
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@@ -27,6 +27,7 @@
#include <osg/LOD>
#include <osg/MatrixTransform>
#include <osg/PagedLOD>
#include <osg/ProxyNode>
#include <osgUtil/LineSegmentIntersector>
#include <osgUtil/IntersectionVisitor>
@@ -37,12 +38,14 @@
#include <osgDB/ReaderWriter>
#include <osgDB/ReadFile>
#include <simgear/math/SGGeometry.hxx>
#include <simgear/bucket/newbucket.hxx>
#include <simgear/debug/logstream.hxx>
#include <simgear/misc/sgstream.hxx>
#include <simgear/scene/util/SGReaderWriterOptions.hxx>
#include <simgear/scene/util/RenderConstants.hxx>
#include <simgear/scene/util/OptionsReadFileCallback.hxx>
#include <simgear/scene/util/OsgMath.hxx>
#include <simgear/scene/util/RenderConstants.hxx>
#include <simgear/scene/util/SGReaderWriterOptions.hxx>
#include <simgear/scene/tgdb/apt_signs.hxx>
#include <simgear/scene/tgdb/obj.hxx>
@@ -109,6 +112,63 @@ struct ReaderWriterSTG::_ModelBin {
int _size;
};
class DelayLoadReadFileCallback : public OptionsReadFileCallback {
public:
virtual osgDB::ReaderWriter::ReadResult
readNode(const std::string&, const osgDB::Options*)
{
osg::ref_ptr<osg::Group> group = new osg::Group;
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->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->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);
if (signBuilder.getSignsGroup())
group->addChild(signBuilder.getSignsGroup());
return group.release();
}
std::list<_ObjectStatic> _objectStaticList;
std::list<_Sign> _signList;
/// The original options to use for this bunch of models
osg::ref_ptr<SGReaderWriterOptions> _options;
SGBucket _bucket;
};
_ModelBin() :
_foundBase(false)
{ }
@@ -326,58 +386,35 @@ struct ReaderWriterSTG::_ModelBin {
continue;
i->_elev += elevation(*terrainGroup, SGGeod::fromDeg(i->_lon, i->_lat));
}
osg::ref_ptr<osg::Group> modelGroup = new osg::Group;
modelGroup->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->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);
if (_objectStaticList.empty() && _signList.empty()) {
// The simple case, just return the terrain group
return terrainGroup.release();
} else {
osg::PagedLOD* pagedLOD = new osg::PagedLOD;
pagedLOD->setCenterMode(osg::PagedLOD::USE_BOUNDING_SPHERE_CENTER);
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)));
// This should be visible in any case.
// If this is replaced by some lower level of detail, the parent LOD node handles this.
pagedLOD->addChild(terrainGroup, 0, std::numeric_limits<float>::max());
// we just need to know about the read file callback that itself holds the data
osg::ref_ptr<DelayLoadReadFileCallback> readFileCallback = new DelayLoadReadFileCallback;
readFileCallback->_objectStaticList = _objectStaticList;
readFileCallback->_signList = _signList;
readFileCallback->_options = options;
readFileCallback->_bucket = bucket;
osg::ref_ptr<osgDB::Options> callbackOptions = new osgDB::Options;
callbackOptions->setReadFileCallback(readFileCallback.get());
pagedLOD->setDatabaseOptions(callbackOptions.get());
osg::MatrixTransform* matrixTransform;
matrixTransform = new osg::MatrixTransform(matrix);
matrixTransform->setDataVariance(osg::Object::STATIC);
matrixTransform->addChild(node.get());
modelGroup->addChild(matrixTransform);
pagedLOD->setFileName(pagedLOD->getNumChildren(), "Dummy name - use the stored data in the read file callback");
pagedLOD->setRange(pagedLOD->getNumChildren(), 0, 30000);
return pagedLOD;
}
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);
if (signBuilder.getSignsGroup())
modelGroup->addChild(signBuilder.getSignsGroup());
osg::LOD* lod = new osg::LOD;
lod->setDataVariance(osg::Object::STATIC);
if (terrainGroup->getNumChildren())
lod->addChild(terrainGroup.get(), 0, std::numeric_limits<float>::max());
if (modelGroup->getNumChildren())
lod->addChild(modelGroup.get(), 0, 30000);
return lod;
}
bool _foundBase;
std::list<_Object> _objectList;
std::list<_ObjectStatic> _objectStaticList;