# hgeParticleManager::Update Updates all active particle systems.
    void Update(
      float fDeltaTime
    );
## Parameters fDeltaTime Amount of time elapsed since last call to the Update method in seconds. ## Remarks Call the Update method in your frame function to update the particle systems hosted by particle systems manager. The amount of time elapsed since last call of frame function may be obtained with Timer_GetDelta system layer function. ## Requirements Header: hgeparticle.h Import library: hgehelp.lib