protected override void OnEntityComponentAdding(Entity entity, ParticleSystemComponent particleSystemComponent, RenderParticleSystem renderParticleSystem)
{
var emitters = particleSystemComponent.ParticleSystem.Emitters;
var emitterCount = emitters.Count;
var renderEmitters = new RenderParticleEmitter[emitterCount];
for (int index = 0; index < emitterCount; index++)
{
var renderEmitter = new RenderParticleEmitter
{
ParticleEmitter = emitters[index],
RenderParticleSystem = renderParticleSystem,
RenderGroup = particleSystemComponent.RenderGroup,
};
renderEmitters[index] = renderEmitter;
VisibilityGroup.RenderObjects.Add(renderEmitter);
}
renderParticleSystem.Emitters = renderEmitters;
}
private void CheckEmitters(RenderParticleSystem renderParticleSystem)
{
if (renderParticleSystem == null)
{
return;
}
var emitters = renderParticleSystem.ParticleSystem.Emitters;
var emitterCount = 0;
if (renderParticleSystem.ParticleSystem.Enabled)
{
foreach (var particleEmitter in emitters)
{
if (particleEmitter.Enabled)
{
emitterCount++;
}
}
}
if (emitterCount == (renderParticleSystem.Emitters?.Length ?? 0))
{
return;
}
// Remove old emitters
if (renderParticleSystem.Emitters != null)
{
foreach (var renderEmitter in renderParticleSystem.Emitters)
{
VisibilityGroup.RenderObjects.Remove(renderEmitter);
}
}
renderParticleSystem.Emitters = null;
// Add new emitters
var enabledEmitterIndex = 0;
var renderEmitters = new RenderParticleEmitter[emitterCount];
for (int index = 0; index < emitterCount; index++)
{
while (enabledEmitterIndex < emitters.Count && !emitters[enabledEmitterIndex].Enabled)
{
enabledEmitterIndex++;
}
if (enabledEmitterIndex >= emitters.Count)
{
continue;
}
var renderEmitter = new RenderParticleEmitter
{
ParticleEmitter = emitters[enabledEmitterIndex],
RenderParticleSystem = renderParticleSystem,
};
renderEmitters[index] = renderEmitter;
VisibilityGroup.RenderObjects.Add(renderEmitter);
enabledEmitterIndex++;
}
renderParticleSystem.Emitters = renderEmitters;
}