Hi Valdimir,
What I have gone for is the following is something similar to yours
but hopefully a little easier to follow and marginally more efficient.
osg::Matrixd modelview = *(cv->getModelViewMatrix());
double scale = (_sortMode==SORT_FRONT_TO_BACK ? -1.0 : 1.0);
double deadDistance = DBL_MAX;
for (unsigned int i=0; i<_particles.size(); ++i)
{
Particle& particle = _particles[i];
if (particle.isAlive())
particle.setDepth(distance(particle.getPosition(),
modelview) * scale);
else
particle.setDepth(deadDistance);
}
std::sort<Particle_vector::iterator>(_particles.begin(),
_particles.end());
// Repopulate the death stack as it will have been
invalidated by the sort.
unsigned int numDead = _deadparts.size();
if (numDead>0)
{
// clear the death stack
_deadparts = Death_stack();
// copy the tail of the _particles vector as this will
contain all the dead Particle thanks to the depth sort against DBL_MAX
Particle* first_dead_ptr =
&_particles[_particles.size()-numDead];
Particle* last_dead_ptr = &_particles[_particles.size()-1];
for(Particle* dead_ptr = first_dead_ptr;
dead_ptr<=last_dead_ptr; ++dead_ptr)
{
_deadparts.push(dead_ptr);
}
}
I have been testing this against the osgparticleshader example with
the following options to force the use of depth sorted particle
system:
osgparticleshader --disable-shaders --visibility 100
Could you try out svn/trunk and let me know if this fixes works fine
at your end.
Thanks,
Robert.
_______________________________________________
osg-submissions mailing list
[email protected]
http://lists.openscenegraph.org/listinfo.cgi/osg-submissions-openscenegraph.org
