how to implement oculus vr haptic feedback

Question

I want to implement haptic feedback for our oculus vr game, but I don't understand how. I went to the documentation which was confusing. A lot of those types aren't recognised. The following code sample is provided by the document.

 uint8_t amplitude = (uint8_t)round(handTrigger[t] * 255);
 
     result = ovr_GetControllerVibrationState(Session, touchController[t], &state);
     if (result != ovrSuccess || state.SamplesQueued >= kLowLatencyBufferSizeInSamples)
     {
         DefaultChannel.LogWarningF("%s Haptics skipped. Queue size %d", kTouchStr[t], state.SamplesQueued);
         continue;
     }
 
     for (int32_t i = 0; i < kLowLatencyBufferSizeInSamples; ++i)
         samples.push_back(amplitude);
 
     if (samples.size() > 0)
     {
         ovrHapticsBuffer buffer;
         buffer.SubmitMode = ovrHapticsBufferSubmit_Enqueue;
         buffer.SamplesCount = (uint32_t)samples.size();
         buffer.Samples = samples.data();
         result = ovr_SubmitControllerVibration(Session, touchController[t], &buffer);
         if (result != ovrSuccess)
         {
             // Something bad happened
             DefaultChannel.LogErrorF("%s: Haptics submit failed %d", kTouchStr[t], result);
         }
     }

Could someone please explain to me how to implement this?

Answer 1

This snippet might help:

 public enum VibrationForce
 {
     Light,
     Medium,
     Hard,
 }
 
 
 public class OculusHaptics : MonoBehaviour
 {
 
     [SerializeField]
     OVRInput.Controller controllerMask;
 
     private OVRHapticsClip clipLight;
     private OVRHapticsClip clipMedium;
     private OVRHapticsClip clipHard;
 
     public  float lowViveHaptics { get; private set; }
     public  float mediumViveHaptics { get; private set; }
     public float hardViveHaptics { get; private set; }
 
     
     private void Start()
     {
         InitializeOVRHaptics();
     }
 
     private void InitializeOVRHaptics()
     {
         
         int cnt = 10;
         clipLight = new OVRHapticsClip(cnt);
         clipMedium = new OVRHapticsClip(cnt);
         clipHard = new OVRHapticsClip(cnt);
         for (int i = 0; i < cnt; i++)
         {
             clipLight.Samples[i] = i % 2 == 0 ? (byte)0 : (byte)45;
             clipMedium.Samples[i] = i % 2 == 0 ? (byte)0 : (byte)100;
             clipHard.Samples[i] = i % 2 == 0 ? (byte)0 : (byte)180;
         }
 
         clipLight = new OVRHapticsClip(clipLight.Samples, clipLight.Samples.Length);
         clipMedium = new OVRHapticsClip(clipMedium.Samples, clipMedium.Samples.Length);
         clipHard = new OVRHapticsClip(clipHard.Samples, clipHard.Samples.Length);
     }
 
 
     void OnEnable()
     {
         InitializeOVRHaptics();
     }
 
     public void Vibrate(VibrationForce vibrationForce)
     {
         var channel = OVRHaptics.RightChannel;
         if (controllerMask == OVRInput.Controller.LTouch)
             channel = OVRHaptics.LeftChannel;
 
         switch (vibrationForce)
         {
             case VibrationForce.Light:
                 channel.Preempt(clipLight);
                 break;
             case VibrationForce.Medium:
                 channel.Preempt(clipMedium);
                 break;
             case VibrationForce.Hard:
                 channel.Preempt(clipHard);
                 break;
         }
     }
 
 
 
     public IEnumerator VibrateTime(VibrationForce force, float time)
     {
         forcedHaptic = true;
         var channel = OVRHaptics.RightChannel;
         if (controllerMask == OVRInput.Controller.LTouch)
             channel = OVRHaptics.LeftChannel;
 
         for (float t = 0; t <= time; t += Time.deltaTime)
         {
             switch (force)
             {
                 case VibrationForce.Light:
                     channel.Queue(clipLight);
                     break;
                 case VibrationForce.Medium:
                     channel.Queue(clipMedium);
                     break;
                 case VibrationForce.Hard:
                     channel.Queue(clipHard);
                     break;
             }
         }
         yield return new WaitForSeconds(time);
         channel.Clear();
         forcedHaptic = false;
         yield return null;
 
     }

Attach it to the Controller Anchor and set it accordingly (Ltouch or RTouch), then just call the methods Vibrate or the coroutine VibrateTime.

how to implement oculus vr haptic feedback

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