float LifeCycleParticleLayer::getIntensity(ParticleStorage::Particle *p)
{
float t = time - getBirthDate(p);
if (t < fadeInDelay) {
return t / fadeInDelay;
} else {
t -= fadeInDelay;
if (t < activeDelay) {
return 1.0f;
} else {
t -= activeDelay;
return max(0.0f, 1.0f - t / fadeOutDelay);
}
}
}
void LifeCycleParticleLayer::removeOldParticles()
{
// all particles with a birth date less than minBirthDate must be deleted
float minBirthDate = time - (fadeInDelay + activeDelay + fadeOutDelay);
ptr<ParticleStorage> s = getOwner()->getStorage();
vector<ParticleStorage::Particle*>::iterator i = s->getParticles();
vector<ParticleStorage::Particle*>::iterator end = s->end();
while (i != end) {
ParticleStorage::Particle *p = *i;
if (getBirthDate(p) <= minBirthDate) {
s->deleteParticle(p);
}
++i;
}
}
bool LifeCycleParticleLayer::isFadingOut(ParticleStorage::Particle *p)
{
float age = time - getBirthDate(p);
return age >= fadeInDelay + activeDelay;
}
bool LifeCycleParticleLayer::isFadingIn(ParticleStorage::Particle *p)
{
float age = time - getBirthDate(p);
return age < fadeInDelay;
}
// print Employee's information (virtual, but not pure virtual)
void Employee::print() const
{
cout << getFirstName() << " " << getLastName()
<< "\nsocial security number: " << getSocialSecurityNumber()
<< "\nbirthday: " << getBirthDate();
}
