Используется в Particle::GetMaxLifetime(), Particle::IncrementParticleParam(), ParticleSource::IncrementParticleParam(), Particle::IncrementParticleParamFromOriginal(), ParticleSource::IncrementParticleParamFromOriginal(), Particle::IsRepeat(), Particle::ScaleParticleParam(), ParticleSource::ScaleParticleParam(), Particle::ScaleParticleParamFromOriginal() и ParticleSource::ScaleParticleParamFromOriginal().