Unity AR Raycasting: Building Interactive Augmented Reality Apps

Creating immersive augmented reality experiences requires a seamless bridge between the physical world and digital objects. Raycasting is the essential technique that allows your AR app to understand surfaces, detect collisions, and place virtual elements accurately in a real space. This text-based course guides you through the core principles of raycasting in Unity, helping you build highly interactive and realistic mobile AR applications. What you'll learn: Understand the foundational math and physics concepts behind raycasting in 3D environments; Configure Unity physics and layer masks to optimize raycast performance on mobile devices; Implement surface detection and digital object placement using modern AR Foundation workflows; Detect user touch inputs and translate screen coordinates into real-world spatial coordinates; Resolve common raycasting bugs and alignment issues in augmented reality scenes. You will start with essential terminology and physics engine basics before moving into practical code implementations for detecting walls, floors, and interactive objects. The content flows logically from theoretical raycast paths to writing clean, optimized C# scripts for mobile AR performance. This course is designed for beginners to Unity and AR development, with no prior AR experience required. Start reading today to master the core interactive mechanics of augmented reality.