For my final "Create with VR" project, I expanded upon the official XRI Template to build a custom interactive testing room. Rather than relying solely on the Inspector to wire up basic grab interactions, I focused on writing custom C# scripts inheriting directly from the XR Interaction Toolkit API (e.g., XRGrabInteractable).

The Diagnostic Scanner: A custom tool that utilizes layer-based Raycasting to read and display the Name and Position of any object it points at in real-time. It features dynamic laser scaling (stopping exactly at the impact point using LineRenderer.SetPosition) and automatically toggles "Force Grab" on the controller only while being hovered over for seamless accessibility.

The Balloon Inflator: A complex interactable that reads raw hardware input from the controller's trigger (activateInteractionState.value). It uses Mathf.Lerp to dynamically scale a spawned balloon prefab based on the exact pressure applied to the trigger.

Advanced Haptics & Physics: The Inflator utilizes dynamic haptic feedback that scales in intensity based on the speed of the user's trigger pull. It also features a "Shake-to-Release" physical mechanic—reading the Rigidbody's velocity magnitude to detach and float the balloon away when the controller is swung past a specific threshold.

This project gave me a much deeper understanding of the XRI update loop (ProcessInteractable override), interface casting (XRBaseInputInteractor), and optimizing compiling speeds in large Unity projects using Assembly Definitions.