std::shared_ptr<void> MainThreadStage()
{
if (!*ps_desc_.ps)
{
ParticleSystemPtr ps = MakeSharedPtr<ParticleSystem>(NUM_PARTICLES);
ps->ParticleAlphaFromTex(ps_desc_.ps_data->particle_alpha_from_tex);
ps->ParticleAlphaToTex(ps_desc_.ps_data->particle_alpha_to_tex);
ps->ParticleColorFrom(ps_desc_.ps_data->particle_color_from);
ps->ParticleColorTo(ps_desc_.ps_data->particle_color_to);
ParticleEmitterPtr emitter = ps->MakeEmitter(ps_desc_.ps_data->emitter_type);
ps->AddEmitter(emitter);
emitter->Frequency(ps_desc_.ps_data->frequency);
emitter->EmitAngle(ps_desc_.ps_data->angle);
emitter->MinPosition(ps_desc_.ps_data->min_pos);
emitter->MaxPosition(ps_desc_.ps_data->max_pos);
emitter->MinVelocity(ps_desc_.ps_data->min_vel);
emitter->MaxVelocity(ps_desc_.ps_data->max_vel);
emitter->MinLife(ps_desc_.ps_data->min_life);
emitter->MaxLife(ps_desc_.ps_data->max_life);
ParticleUpdaterPtr updater = ps->MakeUpdater(ps_desc_.ps_data->updater_type);
ps->AddUpdater(updater);
checked_pointer_cast<PolylineParticleUpdater>(updater)->SizeOverLife(ps_desc_.ps_data->size_over_life_ctrl_pts);
checked_pointer_cast<PolylineParticleUpdater>(updater)->MassOverLife(ps_desc_.ps_data->mass_over_life_ctrl_pts);
checked_pointer_cast<PolylineParticleUpdater>(updater)->OpacityOverLife(ps_desc_.ps_data->opacity_over_life_ctrl_pts);
*ps_desc_.ps = ps;
}
return std::static_pointer_cast<void>(*ps_desc_.ps);
}
