Hi Roman, The scene graph uses ref_ptr<> internally to make sure that it's memory management is robust. In your own application you should also use ref_ptr<> for almost all cases where you would have used a C pointer before. Exceptions are cases such as inner loops where you don't want to pay the cost of ref/unref and know that the object will safely not be deleted while you are accessing it. Another exception would be where you would have a circular reference, here the parent has to have the reference, while the child has a C pointer or an observer_ptr<>.
Whether you actually have a memory leak or not I can not say, but I wouldn't assume it. Particular systems will general particles and until they reach a steady state will keep increase memory usage. The rate of memory usage increase and the point it reaches steady state (starts recycling expired particles) depends upon your settings so try adjust the settings to generate less particles and see if that affect things. Robert. On 7 June 2013 11:32, Roman Grigoriev <[email protected]> wrote: > Hi, > Sorry for newbee question. But I found that my program memory usage grows up > to 200 k per cycle. > I try to find memory leak and maybe some guru look to this code portion and > give me some advice. > (sorry because on linux when I copy code from qtcreator I've got some mess.) > > Code: > > osg::ref_ptr < osg::MatrixTransform > viewnode_mtx; > osg::ref_ptr < SmokeParticleSystem > smoke_right; > > class SmokeParticleSystem : public osg::Group { > private: > // osgParticle::PointPlacer* placer; > public: > SmokeParticleSystem(osg::Group* scene, osg::MatrixTransform* > mt,osg::Uniform *patt) { > osgParticle::ParticleSystem* dustParticleSystem = new > osgParticle::ParticleSystem; > osg::Geode *geode = new osg::Geode(); > geode->addDrawable(dustParticleSystem); > this->addChild(geode); > > // dustParticleSystem->setDefaultAttributes("smoke.rgb", false, > false); > osgParticle::Particle smokeParticle; > smokeParticle.setSizeRange(osgParticle::rangef(1.5f,4.0f)); // meters > smokeParticle.setLifeTime(10); // seconds > smokeParticle.setMass(0.2f); > smokeParticle.setColorRange(osgParticle::rangev4( > osg::Vec4(1, 1.0f, 1.0f, 1.0f), > osg::Vec4(0.8, 0.8, 0.8, 0.0f))); > dustParticleSystem->setDefaultParticleTemplate(smokeParticle); > dustParticleSystem->setDefaultAttributesUsingShaders( "smoke.rgb", > false, 0 ); > osgParticle::ParticleSystemUpdater *dustSystemUpdater = new > osgParticle::ParticleSystemUpdater; > dustSystemUpdater->addParticleSystem(dustParticleSystem); > this->addChild(dustSystemUpdater); > osgParticle::ModularEmitter *emitter = new > osgParticle::ModularEmitter; > emitter->setParticleSystem(dustParticleSystem); > this->addChild(emitter); > dustRate = > static_cast<osgParticle::RandomRateCounter > *>(emitter->getCounter()); > dustRate->setRateRange(20,30); > osgParticle::PointPlacer* placer = > static_cast<osgParticle::PointPlacer *>(emitter->getPlacer()); > this->setUpdateCallback(new EmitterUpdateCallback(placer, mt)); > osgParticle::RadialShooter* shooter = > static_cast<osgParticle::RadialShooter > *>(emitter->getShooter()); > shooter->setThetaRange(-osg::PI_4/8.0, osg::PI_4/8.0 ); // radians, > relative to Z axis. > shooter->setInitialSpeedRange(0,20); // meters/second > emitter->setShooter(shooter); > osgParticle::ModularProgram *program = new > osgParticle::ModularProgram; > program->setParticleSystem(dustParticleSystem); > scene->addChild(program); > > osgParticle::FluidFrictionOperator *airFriction = new > osgParticle::FluidFrictionOperator; > airFriction->setFluidToAir(); > airFriction->setWind(osg::Vec3(0.25, 0, 0)); > program->addOperator(airFriction); > > osgParticle::AccelOperator *accelUp = new osgParticle::AccelOperator; > accelUp->setToGravity(-0.2f); > program->addOperator(accelUp); > > osg::StateSet* stateset = dustParticleSystem->getOrCreateStateSet(); > stateset->setAttribute(program_data->particle_program); > osg::Uniform* baseTextureSampler = new osg::Uniform("baseTexture",0); > stateset->addUniform(baseTextureSampler); > stateset->addUniform(patt); > } > osgParticle::RandomRateCounter *dustRate; > }; > > > > At the begining of every cycle I clean root this way. > > Code: > > viewnode_mtx->removeChildren(0,viewnode_mtx->getNumChildren()); > > > > when I need to add particle system to scenery root I use. > > Code: > > this->smoke_right = new SmokeParticleSystem(this->viewnode, > this->pat_r.get(),this->point_att_u); > this->smoke_right->setNodeMask(IS_VISIBLE_MASK); > this->smoke_right->setName("smoke"); > this->viewnode_mtx->addChild( this->smoke_right); > > > > Could you please comment if memory freed when I remove children or not. And > maybe I should use ref_ptr on smokeparticlesystem. > Thank you! > Cheers, > Roman > > ------------------ > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=54481#54481 > > > > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
