Hi all,
I am trying to create a exhaust flame of a moving rocket similar to one shown
in attached image 1. I need only the exhaust plume of the rocket. The rocket is
moving [b]fast[/b]. To do so,
I used osgParticles to make the particle system as shown below in code:
sg::ref_ptr<osgParticle::ParticleSystem> ps = new
osgParticle::ParticleSystem;
ps->getDefaultParticleTemplate().setShape( osgParticle::Particle::QUAD);
ps->getDefaultParticleTemplate().setLifeTime( 0.50f );
ps->getDefaultParticleTemplate().setSizeRange( osgParticle::rangef(0.5f, 0.1f)
);
ps->getDefaultParticleTemplate().setAlphaRange( osgParticle::rangef(0.5f,
0.0f) );
ps->getDefaultParticleTemplate().setColorRange(osgParticle::rangev4(osg::Vec4(45.0/255.0f,179.0/255.0,217/255.0f,1.0f),
osg::Vec4(172.0/255.0f,225.0/255.0f,240/255.0f,1.0f)) );
ps->setDefaultAttributes("smoke.rgb", true, false );
osg::ref_ptr<osgParticle::RandomRateCounter> rrc = new
osgParticle::RandomRateCounter;
rrc->setRateRange( 100, 200 ); //200-800
osg::ref_ptr<osgParticle::ModularEmitter> emitter = new
osgParticle::ModularEmitter;
emitter->setParticleSystem( ps.get() );
emitter->setCounter( rrc.get() );
osg::ref_ptr<osgParticle::RadialShooter> shooter = new
osgParticle::RadialShooter;
shooter->setThetaRange(osg::DegreesToRadians(-0.50),
osg::DegreesToRadians(0.50) );
shooter->setInitialSpeedRange( 1.5f, 1.0f );
emitter->setShooter( shooter.get() );
ps->setUseShaders(true);
osg::ref_ptr<osgParticle::ModularProgram> program = new
osgParticle::ModularProgram;
program->setParticleSystem( ps.get() );
I observe that this creates a flame good for a stationary rocket. But as the
rocket is moving fast, it leaves patches of Quad particle behind on it trail.
Shown in attached image 2.
I reuced the lifetime of particles, but it didn't help.
I want to avoid making the trail. I need the particles to appear as in image 1,
even when the rocket moves forward. How to do it??
I feel i need to make the emitted particles to also move along with rocket.
The particle system is already a child of MatrixTransform that supplies motion
to rocket.
i read the osgparticleffect.cpp but the customization shown der didn't help
much.. Any help on creating this effect???
...
Thank you!
Cheers,
Suraj
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=68734#68734
Attachments:
http://forum.openscenegraph.org//files/cessna_on_fire_117.png
http://forum.openscenegraph.org//files/299f509dab3e7b7cc670e8a999f2dcfe_715.png
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