[osg-users] osg::ref ptr and memory leaks.
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_castosgParticle::RandomRateCounter
*(emitter-getCounter());
dustRate-setRateRange(20,30);
osgParticle::PointPlacer* placer =
static_castosgParticle::PointPlacer *(emitter-getPlacer());
this-setUpdateCallback(new EmitterUpdateCallback(placer, mt));
osgParticle::RadialShooter* shooter =
static_castosgParticle::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
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http://forum.openscenegraph.org/viewtopic.php?p=54481#54481
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Re: [osg-users] osg::ref ptr and memory leaks.
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 grigor...@gosniias.ru 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_castosgParticle::RandomRateCounter
*(emitter-getCounter());
dustRate-setRateRange(20,30);
osgParticle::PointPlacer* placer =
static_castosgParticle::PointPlacer *(emitter-getPlacer());
this-setUpdateCallback(new EmitterUpdateCallback(placer, mt));
osgParticle::RadialShooter* shooter =
static_castosgParticle::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(
Re: [osg-users] osg::ref ptr and memory leaks.
Hi, Robert Thanx for your quick reply, Is there any way to calculate memory usage of my custom particle system class? If I query this-smoke_right.valid() it returns false, when i remove children but As far as you've seen I don't have destructor on my node and I suspect that internal geode and particle system doesn't free from memory. Maybe It's better in this situation not to use ref_ptr? Or maybe create particle system in the beginning and attach already made every time but in this way I have to clean all particle system variables. Thank you! Cheers, Roman -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=54489#54489 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] osg::ref ptr and memory leaks.
Another idea might be to use valgrind, memory doctor or some similar program to detect actuall memory leaks. -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=54491#54491 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
