Assignment 2 is the second Foundation Assignment, graded out of 10. It forms part of the 60% Foundation Assignments block (pass all six and your lowest passing grade is dropped).

Fork and Clone via: https://gitlab.utwente.nl/getxr2026/a2-getxr-assignment

The Git workflow (forking, cloning outside cloud-synced storage, staging companion .meta files, and pushing via GitHub Desktop) follows the same process described for A1: Basic Movement.

Repository: Fork a2-getxr-assignment as getxr-a2 (Private), and share it with the getxr2026 group as Reporter.

Git Help & Guide: For step-by-step setup, credential management, Git LFS, and troubleshooting, see the Using GitLab & GitHub Desktop guide.

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What to Build

In this assignment, you transition from controlling a single object to building a dynamic real-time gameplay loop. You will build a Unity scene centered around runtime instantiation, collection tracking, and physics-driven state changes. Implement the following:

A spawner that periodically instantiates collectible items into the scene over time.
An in-game activation toggle that lets you turn the spawner on and off during play (e.g. via a key press or trigger switch), cleanly pausing and resuming instantiation.
A dynamic collection (List<GameObject>) that tracks all spawned objects in memory and enforces a capacity limit.
A player interaction system where your player detects contact with spawned objects via physics triggers.
A game state change where collecting or hitting an object updates a value (such as score).
A cleanup system where spawned objects are destroyed when collected or out-of-bounds, and their references are pruned from your tracking list.

You can reuse your Player prefab and Mover.cs from A1 (or a simple moving primitive) to interact with spawned objects.

Scene Setup

Do not spend time looking for fancy 3D models or searching asset packs. Grading is only based on your C# scripting, physics triggers, and memory management. Basic Unity 3D primitives (Cubes, Spheres, Capsules) with colored materials are enough for a 10/10. It just needs to be clear what is happening in the scene:

Player: 3D Capsule or Cube with Mover.cs (from A1).
Spawner: An empty GameObject placed above the floor, periodically dropping or placing coins across the floor.
Spawned Object: 3D Cylinder (squished into a coin disc). Start from the provided Collectible.prefab — add the trigger Collider and kinematic Rigidbody as described below, colored Yellow.
Interaction: Touching a coin destroys the object, increments a variable score += 10, and prunes the list reference.

Template Setup & Wiring

Fork the template:

The scene (Assets/Scenes/A2-Scene.unity) has an empty Spawner GameObject marking where it goes — attach Spawner.cs to it and wire up its Prefab To Spawn field.