threejs-interaction

Add mouse and touch interaction to a Three.js scene by instantiating OrbitControls for camera navigation and a Raycaster to detect pointer intersections with 3D objects. This enables responsive click and select inputs in web apps.

Raycasting for object picking in WebGL casts a mathematical ray from the camera through the screen pointer position. It detects intersections with 3D meshes in the scene, allowing users to click, select, and manipulate specific 3D objects.

Yes, OrbitControls support both mouse and touch inputs for navigating 3D experiences. They provide intuitive camera controls that respond to mobile touch gestures, enabling interactive 3D scenes across web apps and demos.

Build an interactive product configurator in Three.js by combining raycasting-based object picking with pointer event handling. This enables users to select and manipulate specific parts of 3D models by clicking directly on them.

No external dependencies are required beyond the core Three.js library. The interaction handling utilizes built-in raycasting and control utilities, ensuring high compatibility and modular code organization for interactive 3D experiences.

Use Three.js raycasting instead of standard DOM events because 3D objects render inside a WebGL canvas rather than the DOM. Raycasting calculates pointer intersections in 3D space, enabling accurate object selection where DOM events cannot.