public void Simulate(float elapsedMS)
{
//Advance the time of the simulation
m_time.TickMS(elapsedMS);
//Emit particles as necessary
if (m_active)
{
m_particleToEmit += Definition.EmitRate * elapsedMS / 1000.0f;
}
if (m_active && /*m_emissionTimer.Active == false && */ m_particleToEmit >= 1)
{
m_emissionTimer.Start();
for (int i = 0; i < m_particleToEmit; i++)
{
Emit();
m_particleToEmit--;
}
}
//ResetModifiers
for (int i = 0; i <= m_maxUsedIndex; i++)
{
m_particles[i].ScaleModifier = Vector2.One;
m_particles[i].ColorModifier = m_particles[i].Color;
}
//Run through all modifiers
for (int i = 0; i <= m_maxUsedIndex; i++)
{
for (int iMod = 0; iMod < m_modifiers.Count; iMod++)
{
m_modifiers[iMod].Modify(m_particles, i, i + 1, elapsedMS);
}
}
//Update age and position
float velocityScale = 0.1f;
for (int i = 0; i <= m_maxUsedIndex; i++)
{
m_particles[i].Age += elapsedMS;
m_particles[i].Position += m_particles[i].Velocity * elapsedMS * velocityScale;
m_particles[i].Orientation += m_particles[i].AngularVelocity * elapsedMS;
}
//Finally, remove all dead particle
for (int i = 0; i <= m_maxUsedIndex; i++)
{
if (m_particles[i].Alive && m_particles[i].Age >= m_particles[i].LifetimeMS)
{
m_particles[i].Alive = false;
m_freeParticles.Push(i);
}
}
}
