6. Introduction

6.  Introduction

The Meta Quest 3 marks a pivotal shift from pure Virtual Reality (VR) to high-fidelity Mixed Reality (MR). By leveraging high-resolution color passthrough and a significantly more powerful Snapdragon XR2 Gen 2 chipset, it allows digital content to coexist seamlessly with the physical world. With its slimmer "pancake" optics and 4K+ Infinite Display, it is currently the most accessible powerhouse for both consumers and developers.

6.1 Introduction to Meta Quest 3 and Mixed Reality

The Meta Quest 3 utilizes high-resolution Color Passthrough technology. Unlike traditional VR, where the world is entirely virtual, Mixed Reality (MR) uses onboard cameras to project the real environment and then overlays WebGL elements on top. Your code utilizes the immersive-ar mode, which is the core of this spatial experience.

System Architecture (The Web Stack)

The application functions as a "sandwich" of layers:

• Layer 1 (Hardware): Quest 3 sensors, depth projectors, and RGB cameras.
• Layer 2 (Browser): Meta Quest Browser (Chromium-based with WebXR support).
• Layer 3 (API): WebXR Device API, which acts as the bridge between hardware and code.
• Layer 4 (Logic): Your JavaScript logic using Three.js for rendering and TensorFlow.js for vision.