/*!
* \brief Applies the controllers
*
* \param mapper Mapper containing layout information of each particle
* \param particleCount Number of particles
* \param elapsedTime Delta time between the previous frame
*/
void ParticleGroup::ApplyControllers(ParticleMapper& mapper, unsigned int particleCount, float elapsedTime)
{
m_processing = true;
// To avoid a lock in case of exception
CallOnExit onExit([this]()
{
m_processing = false;
});
for (ParticleController* controller : m_controllers)
controller->Apply(*this, mapper, 0, particleCount - 1, elapsedTime);
onExit.CallAndReset();
// We only kill now the dead particles during the update
if (m_dyingParticles.size() < m_particleCount)
{
// We kill them in reverse order, std::set sorting them via std::greater
// The reason is simple, as the death of a particle means moving the last particle in the buffer,
// without this solution, certain particles could avoid death
for (unsigned int index : m_dyingParticles)
KillParticle(index);
}
else
KillParticles(); // Every particles are dead, this is way faster
m_dyingParticles.clear();
}
void ParticleSystem::AddTime(double time)
{
if(liveParticles > 0)
{
for(int i = 0;i < liveParticles;i++)
{
if(cpuData[i].currentLifeTime + time >= cpuData[i].lifeTime)
{
KillParticle(i);
if(i == liveParticles)
break;
}
ParticleCPUData & cdata = cpuData[i];
ParticleGPUData & gdata = gpuData[i];
cdata.currentLifeTime += time;
float lifeTimeFactor = ((cdata.lifeTime - cdata.currentLifeTime) / cdata.lifeTime);
if(useSizeOverLife)
gdata.size = lifeTimeFactor* cdata.size;
else gdata.size = cdata.size;
Vector3 currentVelocity;
if(useVelocityOverLife)
currentVelocity = cdata.velocity * lifeTimeFactor;
else currentVelocity = cdata.velocity;
gdata.worldPos = gdata.worldPos + currentVelocity;
if(useOpacityOverLife)
gdata.opacityFactor = lifeTimeFactor;
else gdata.opacityFactor = 1.0f;
}
}
if(addParticles)
if(currentSpawnTime + time >= spawnTime && liveParticles < maxParticles)
{
unsigned int spownCount = minSpawnParitcles + rand() % (maxSpawnParticles - minSpawnParitcles);
if(liveParticles + spownCount > maxParticles)
spownCount = maxParticles - liveParticles;
for(unsigned int i = 0;i < spownCount;i++)
{
AddParticle();
}
currentSpawnTime = 0;
}
else currentSpawnTime += time;
}
