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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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81
src/osgParticle/ParticleProcessor.cpp
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@@ -26,7 +26,8 @@ osgParticle::ParticleProcessor::ParticleProcessor()
_lifeTime(0.0),
_startTime(0.0),
_currentTime(0.0),
_resetTime(0.0)
_resetTime(0.0),
_frameNumber(0)
{
setCullingActive(false);
}
@@ -64,51 +65,59 @@ void osgParticle::ParticleProcessor::traverse(osg::NodeVisitor& nv)
if (nv.getFrameStamp())
{
// retrieve the current time
double t = nv.getFrameStamp()->getReferenceTime();
// reset this processor if we've reached the reset point
if ((_currentTime >= _resetTime) && (_resetTime > 0))
{
_currentTime = 0;
_t0 = -1;
}
// skip if we haven't initialized _t0 yet
if (_t0 != -1)
//added- 1/17/06- bgandere@nps.edu
//a check to make sure we havent updated yet this frame
if(_frameNumber < nv.getFrameStamp()->getFrameNumber())
{
// check whether the processor is alive
bool alive = false;
if (_currentTime >= _startTime)
// retrieve the current time
double t = nv.getFrameStamp()->getReferenceTime();
// reset this processor if we've reached the reset point
if ((_currentTime >= _resetTime) && (_resetTime > 0))
{
if (_endless || (_currentTime < (_startTime + _lifeTime)))
alive = true;
_currentTime = 0;
_t0 = -1;
}
// update current time
_currentTime += t - _t0;
// process only if the particle system is not frozen/culled
if (alive &&
_enabled &&
!_ps->isFrozen() &&
(_ps->getLastFrameNumber() >= (nv.getFrameStamp()->getFrameNumber() - 1) || !_ps->getFreezeOnCull()))
// skip if we haven't initialized _t0 yet
if (_t0 != -1)
{
// initialize matrix flags
_need_ltw_matrix = true;
_need_wtl_matrix = true;
_current_nodevisitor = &nv;
// do some process (unimplemented in this base class)
process(t - _t0);
// check whether the processor is alive
bool alive = false;
if (_currentTime >= _startTime)
{
if (_endless || (_currentTime < (_startTime + _lifeTime)))
alive = true;
}
// update current time
_currentTime += t - _t0;
// process only if the particle system is not frozen/culled
if (alive &&
_enabled &&
!_ps->isFrozen() &&
(_ps->getLastFrameNumber() >= (nv.getFrameStamp()->getFrameNumber() - 1) || !_ps->getFreezeOnCull()))
{
// initialize matrix flags
_need_ltw_matrix = true;
_need_wtl_matrix = true;
_current_nodevisitor = &nv;
// do some process (unimplemented in this base class)
process(t - _t0);
}
}
// update _t0
_t0 = t;
}
// update _t0
_t0 = t;
//added- 1/17/06- bgandere@nps.edu
//updates the _frameNumber, keeping it current
_frameNumber = nv.getFrameStamp()->getFrameNumber();
}
else
{