FPS dropped after while using Neurosky Plugin

Question

I'm using Mindwave Plugin from the following link: https://github.com/DaCookie/mindwave-unity

and I created a simple code to take the output EEG readings of the Neurosky headset to move the car forward, but whenever I run the game, the fps drops to 2fps

 [SerializeField, Range(0.0f, 100.0f)]
     [Tooltip("Player must hold its attention over this value to initialize car movement \"Focus phase\"")]
     private float m_RequiredAttention = 10.0f;
 
     private void Start()
     {
         Application.targetFrameRate = 30;
         MindwaveManager.Instance.Controller.OnUpdateMindwaveData += OnUpdateMindwaveData;
     }
 
     public void OnUpdateMindwaveData(MindwaveDataModel _Data)
     {
             if (_Data.eSense.attention >= m_RequiredAttention)
             {
             // Make the car move forward
             transform.position += transform.forward * 30 * Time.deltaTime;
             }
     }

Can anyone tell me what to do, it's for my graduation project

Answer 1

Answer by tuinal · Aug 07, 2020 at 11:55 PM

This is a quick answer, but, hopefully some help.

Neurosky updates at ~1Hz. If your code is waiting for the API to return a value it will probably wait for this which is the delay you're experiencing.

Move the API requests to a coroutine that changes a variable you respond to in update. e.g. move the API code to an IEnumerator that changes a float 'attention', and in Update respond to that.

It's btw a bit sketchy what NeuroSky measures (they've always been very black-box about it and there's a very open question about EMG - e.g. facial movement - vs claimed ability to meaningfully measure EEG given their electrode setup). Might be worth noting in the dissertation! :)

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FPS dropped after while using Neurosky Plugin

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