Build Complete VR App in Unity with Eye Tracking & EEG

Install Unity Hub, download Unity, and sign in or create an account to obtain a personal or professional license. Enable Universal Windows Platform build support for VR applications.

Create a new Unity project, organize assets, scripts, and environment folders, and set up scenes with open scenes, scene view, and game view to enable transitions and platform settings.

Create and rename scenes in Unity to build a VR flow, including a user form, chemistry lab, questionnaire, and end screen with data saved per user.

Add and configure input fields and dropdowns for a participant form in Unity, using text mesh pro and placeholders, on a screen space camera canvas.

Finalize the user form by configuring vision and hearing dropdowns with observations, enforcing VR rules for lens-corrected vision, and polishing the submit button and colors for a ready VR app.

Set up a practice trial in Unity for the VR chemistry lab by creating empty GameObjects to delineate practice from study and configuring a canvas UI for user instructions.

Continue building the practice trial canvas by adding the title, instructions, and UI text with Mesh Pro, then adjust layout and fonts and configure the start button.

Learn how to back up Unity projects with GitHub, sign up, create a repository, enable collaboration, and access your code from desktop apps on Windows or Mac.

Set up a local Unity project with GitHub Desktop by linking accounts, creating a repository, and publishing a private repo with optional readme, gitignore, and license.

Import and set up the VR camera, pointer, and right-hand model in Unity, then test button interactions in the main scene.

Learn to add a simple, endless liquid pouring effect into a bottle in Unity using a free liquid asset, configure a collider, liquid container script, color, and particle system.

Build a Unity fluid system by adding a fluid object with mesh filter, renderer, and collider; color liquid, position it in bottle and beaker, and enable filling via collider interactions.

Create a C# script for on collision to fill the beaker when colliders touch, set fill to 0.9, attach it to the practice beaker, and test in VR headset.

Configure the study setup by enabling the chemistry lab study, moving models from practice, updating robot prompts for three experiments, and placing a potassium rock on a plate.

Learn to enable experiment one on condition in Unity by scripting a start button to reveal the chemistry lab models and activate the experiment object, with neurofeedback considerations.

Implement audio on collision by wiring an audio source to potassium, enabling it when it hits water, and add particle effects using carbon effects assets.

Add a fluid system to the brown bottle, including retractable and collision scripts, capsule collider, and endless liquid container to make the bottle interactable in VR.

Click to enable the fluid in the brown bottle by using the mesh collider and ensuring a fluid mesh is present; otherwise the liquid won't appear on the paper.

Enable interaction with the aluminum model in Unity by enabling its mesh and capsule colliders after the beaker contains liquid, and update robot instructions for experiment two.

Finalize experiment two by triggering the aluminum and glass material changes, a purple light with a range of 0.1, and timed color and material swaps via the mini aluminum script.

Write a Unity script to reveal and activate experiment three only after completing experiment two, coordinating booleans, delays, and interactions (grab white bottle, pour into plate) for the lab scene.

Add a flame object with a liquid particle system and configure its rotation, color, and lifetime in Unity. Trigger the flame on plate contact via a collision script.

Configure the questionnaire scene by adding and arranging five questions, renaming items, adjusting font sizes, and styling the submit button, then test in VR with pointer interactions.

Create and configure a toggle group for each question in the questionnaire scene, add interactive toggles for all answers, customize labels and fonts, and ensure only one option is selected.

Create and wire a Unity questionnaire script to enable the submit button only after answering all five questions, validating inputs and connecting to the canvas in the VR app.

Learn the second method to change scenes in Unity using a scene index. Map build settings indices to scenes like chemistry lab and questionnaire and load by index.

Learn a script-driven method to change scenes in Unity for counterbalanced research tasks, using a scene data script to move from chemistry lab to questionnaire without editing task data.

Create a Unity C# script to save participant demographics from the user form, initialize input fields and dropdowns, validate username and age, and enable the submit button for data collection.

Save user form and demographics data in Unity, then transition to the next scene using a public next scene function from the scene data script.

Download the pupil core software, connect it to the Unity project, and integrate a calibration step in the chemistry lab scene to enable eye-tracking data collection.

Configure Unity API compatibility to version four, set calibration parameters, attach the VR camera, and enable gaze tracking after completing the practice trial, then run the calibration sequence.

Set up and calibrate the eye tracker in the Unity scene, record eye-tracking data during practice trials, and export fixation and position data for analysis using the data exporter.

Test and save eye-tracking data from users during calibration and three experiments in a Unity VR app, linking demographics, instructions, models, and experiment timestamps for EEG integration.