Plug-ins are able to subscribe to updates, receiving callbacks every frame to do any custom work on a per-frame basis. In the simplest case, we can simply override the Cry::IEnginePlugin::MainUpdate function:

Receiving Updates

Using your CRYENGINE account, you can download the CRYENGINE launcher by following the below steps:

virtual bool Initialize(SSystemGlobalEnvironment& env, const SSystemInitParams& initParams) override
{
  // Enable the MainUpdate step
  EnableUpdate(EUpdateStep::MainUpdate, true);
}

virtual void MainUpdate(float frameTime) override
{
  CryLogAlways("Update with frame time %f", frameTime);
}

Once compiled, you can launch the application and notice that the logging we do each frame is output to the console. This can be extended with any custom logic you want.