Hello,
I think that I found a problem on
osgParticle::FluidFrictionOperator::operate(Particle* P, double dt),
I suppose that the current modular program is in relative reference frame.
The method compute a force (Fr) from velocity of the particle which is
in local space
The force is then converted in world space
if (_current_program->getReferenceFrame() ==
ModularProgram::RELATIVE_RF) {
Fr = _current_program->rotateLocalToWorld(Fr);
}
Then delta velocity computed in world space is added to the particle
velocity which is on local space
// correct unwanted velocity increments
osg::Vec3 dv = Fr * P->getMassInv() * dt;
float dvl = dv.length();
if (dvl > vm) {
dv *= vm / dvl;
}
P->addVelocity(dv);
I think that there is a problem.
Can someone tell me if I wrong or not?
Thank you.
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