Skip to content

HMD Specific Information

Exit Poll

The gaze buttons used by Exit Poll use the Vive HMD's forward direction to activate, NOT the eye tracking position. This will change in future releases of our SDK.

Tobii Pro VR 2.13.3


The Tobii Pro SDK Unity Package includes an example scene TobiiPro/Examples/PrefabDemo/VRPrefabDemo. This scene includes prefabs from the SteamVR Plugin Unity Package available for free on the Unity Asset Store. These SteamVR prefabs are recommended, but not required.

In your scene, you must have Tobii's [VREyeTracker] prefab for fixations to be recorded correctly.

Fove 0.14


To capture the player's gaze correctly, you must set the Fove Interface game object with the Camera Component to be tagged as MainCamera.

fove main camera

Exit Poll

As the Fove does not have a microphone built in, the Exit Poll microphone popup will not detect audio input unless there is a separate microphone connected and enabled.

Vive Pro Eye


Import the Vive-SRanipal-Unity-Plugin.unitypackage into your project. In your scene, add a new GameObject and add the SRanipal_Eye_Framework component.

Pupil Labs Vive Add-on


The Pupil Labs Unity SDK requires Unity 2018.3 or newer

  1. Install the Vive Add-On
  2. Download the Pupil Software and run Pupil Capture.exe
  3. Download and import the Hmd-Eyes.VR.v1.0.unitypackage
  4. Add the Assets/Plugins/Pupil/Prefabs/Gaze Tracker prefab into your scene. In that prefab:
    • Select the Gaze Visualizer GameObject and set the Gaze Origin variable to the Main Camera
    • Select the Calibration Controller GameObject and set the Camera variable to the Main Camera
    • Select the Connection GameObject and check that the Port matches the settings in the Pupil Capture.exe
  5. Open the Project Settings from the Edit Menu. Select the Player category. Then:
    • Set the Scripting Runtime Version to .Net 4.x Equivalent
    • Set the API Compatibility Level to .Net 4.x
  6. Open the Cognitive Scene Setup. Select Pupil Labs SDK. Continue through the setup process.
  7. It is recommended that you select the CognitiveVR_Manager and disable Initialize On Start and enable Initialize After Calibration

Play and press C to begin calibrating the Pupil Labs eye tracking.

Leap Motion Controller 4.0.0

The implementation below for Leap Motion Controller does not record the full articulation of each finger, just the transform of each palm.

Leap Motion Interaction Module requires Unity 2017.2 or newer.


  1. Add a Leap Rig prefab into your scene
  2. Add a LoPoly Rigged Hand Left and Right parented to the Leap Rig/Hand Models gameobject
  3. On the Hand Models gameobject, in the Hand Model Manager component, replace the Left Model and Right Model fields with the LoPoly Rigged Hand gameobjects
  4. Delete the Capsule Hand gameobjects
  5. Add Dynamic Object components to the LoPoly Rigged Hand Left/L_Wrist/L_Palm. Make sure to select deselect Custom Mesh and choose Leap Motion Hand Left from the dropdown. Repeat this for the right hand.

Common Hand Events

Using the Detector components (such as FingerDirectionDetector, PalmDirectionDetector, etc) from the Leap Motion Interaction module, you can easily add Dynamic Object Engagements to a Hand Dynamic Object. Here is an example setup:

leapmotion point event

The script used in this example is:

using UnityEngine;
public class EngagementEvent : MonoBehaviour
    public CognitiveVR.DynamicObject TargetDynamic;
    public string EngagementName = "point";

    public void BeginEngagement()
        if (TargetDynamic != null)

    public void EndEngagement()
        if (TargetDynamic != null)


Camera Focus

If the Pupil Labs cameras are not correctly focused, they may not correctly record eye position

Multiple SDKs

Since the Pupil Labs and Tobii Pro cameras are installed onto the HTC Vive, you can use the SteamVR SDK at the same time. When selecting your SDK, use Shift + Click to select multiple SDKs you wish to use.

multiple sdks

If you are only using either the Pupil Labs or Tobii Pro SDK, you do not need to select Unity Default as well.