threejs-core-raycaster

What problem does it solve?

Efficient, accurate mouse picking in Three.js scenes using Raycaster to test intersections against a target object set, while avoiding unnecessary traversal and ensuring reliable results for hover and click interactions.

Core Features & Use Cases

• Raycaster-based mouse picking with setFromCamera and set origin/direction
• intersectObject and intersectObjects with optional recursive traversal
• InstancedMesh picking support via instanceId and per-instance data
• Layer filtering using raycaster.layers to restrict tests to interactive objects
• Performance guidance including throttling, array reuse, and selective testing

Quick Start

Initialize a Raycaster, convert your mouse coordinates to normalized device coordinates, and call intersectObjects or intersectObject on your target objects.