Hi Maximum,
On Thu, Sep 16, 2010 at 8:57 PM, Maxim Gammer <[email protected]> wrote:
> I understand it, but I do not see a better solution. How to solve this
> problem another way? This will require very large changes in osgpartitsle
> .... to fix one little problem ..... and this will require a lot of time
A fully robust particle system will certainly take a rewrite, so right
now it's a case of tweaking things to make them improve things w.r.t
what happens when the time delta is very large.
> I do not know who can help me in solving this problem.
>
> Do you think my solution at all bad?
I don't think your solution makes physical or logical sense, it's the
randomize part that I don't believe is justifiable.
> I really want to solve this problem in version 3.0 ... but not knowing how
> to do it ...
For a quick fix my inclination is put in a clamp of the number of
particles produced to the maximum specified in the rate counter, this
would related to saying the maximum time delta is 1 second. Something
like:
inline int RandomRateCounter::numParticlesToCreate(double dt) const
{
// clamp the time delta to 1 second or below to prevent too many
// particles being produced all at once.
if (dt>1.0) dt = 1.0;
_np += dt * getRateRange().get_random();
int n = static_cast<int>(_np);
_np -= n;
return n;
}
Or take the approach of limiting the max number to maximum number that
could be produced in one second:
inline int RandomRateCounter::numParticlesToCreate(double dt) const
{
float numNewParticles = std::min(dt *
getRateRange().get_random(), getRateRange().maximum);
_np += numNewParticles;
int n = static_cast<int>(_np);
_np -= n;
return n;
}
Could you try these two approach at your end to see if they work OK?
Robert.
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