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From Brad Anderegg, add _frameNumber and associated code to ensure that particles

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only get updated once per frame.
This commit is contained in:
Robert Osfield
2006-02-04 21:12:45 +00:00
parent 83add79c07
commit 3baf9f51d2
4 changed files with 72 additions and 46 deletions
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29
src/osgParticle/ParticleSystemUpdater.cpp
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@@ -6,7 +6,7 @@
using namespace osg;
osgParticle::ParticleSystemUpdater::ParticleSystemUpdater()
: osg::Node(), _t0(-1)
: osg::Node(), _t0(-1), _frameNumber(0)
{
setCullingActive(false);
}
@@ -26,19 +26,28 @@ void osgParticle::ParticleSystemUpdater::traverse(osg::NodeVisitor& nv)
if (cv) {
if (nv.getFrameStamp())
{
double t = nv.getFrameStamp()->getReferenceTime();
if (_t0 != -1)
{
ParticleSystem_Vector::iterator i;
for (i=_psv.begin(); i!=_psv.end(); ++i)
//added 1/17/06- bgandere@nps.edu
//ensures ParticleSystem will only be updated once per frame
//regardless of the number of cameras viewing it
if( _frameNumber < nv.getFrameStamp()->getFrameNumber())
{
double t = nv.getFrameStamp()->getReferenceTime();
if (_t0 != -1)
{
if (!i->get()->isFrozen() && (i->get()->getLastFrameNumber() >= (nv.getFrameStamp()->getFrameNumber() - 1) || !i->get()->getFreezeOnCull()))
ParticleSystem_Vector::iterator i;
for (i=_psv.begin(); i!=_psv.end(); ++i)
{
i->get()->update(t - _t0);
if (!i->get()->isFrozen() && (i->get()->getLastFrameNumber() >= (nv.getFrameStamp()->getFrameNumber() - 1) || !i->get()->getFreezeOnCull()))
{
i->get()->update(t - _t0);
}
}
}
}
_t0 = t;
_t0 = t;
}
//added- 1/17/06- bgandere@nps.edu
//set frame number to the current frame number
_frameNumber = nv.getFrameStamp()->getFrameNumber();
}
else
{