threejs-interaction

Implement raycasting, camera controls, and object selection for Three.js scenes.

Updated Jan 31, 2026

Search Tags:#javascript #webgl #threejs #input-handling #raycasting #orbit-controls #3d-interaction

Ready to run

npx skills add https://github.com/Clinscott/CStar --skill threejs-interaction-clinscott

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: threejs-interaction
Source: https://github.com/Clinscott/CStar/tree/main/skills_db/threejs-skills/skills/threejs-interaction
Command: npx skills add https://github.com/Clinscott/CStar --skill threejs-interaction-clinscott

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This skill helps developers implement robust user input handling in Three.js scenes, including raycasting for object selection and camera controls, reducing boilerplate and errors.

Core Features & Use Cases

Raycasting-based click detection and object selection
Built-in camera controls (OrbitControls, FirstPersonControls, TrackballControls)
Comprehensive input handling for mouse, touch, and keyboard interactions
Real-world use cases: interactive 3D product demos, tutorials, and data visualizations

Quick Start

Create a simple Three.js scene and enable raycasting-based object interaction with OrbitControls to begin selecting objects in the scene.

Frequently Asked Questions about threejs-interaction

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I implement raycasting for object selection in a Three.js scene?▼

Raycasting in Three.js is implemented by casting a ray from the camera through input coordinates to detect intersections. This skill provides reusable raycasting techniques to handle click detection and object selection, reducing boilerplate code.

How do I set up OrbitControls and touch input handling for Three.js web experiences?▼

Setting up OrbitControls and touch input in Three.js requires mapping user interactions to camera movements and scene objects. This skill supplies built-in camera controls and comprehensive input handling for mouse, touch, and keyboard interactions.

What is the best way to handle user input in 3D product demos and data visualizations?▼

Handling user input in 3D product demos and data visualizations requires robust raycasting and camera control techniques. This approach provides a reusable set of input-handling patterns specifically structured for interactive web-based 3D experiences.

Does this Three.js interaction approach support both mouse and touch events?▼

Yes, this Three.js interaction approach supports comprehensive input handling for mouse, touch, and keyboard interactions. It applies raycasting and camera controls to ensure cross-device compatibility for web-based 3D scenes.

Can I use FirstPersonControls and TrackballControls alongside raycasting in Three.js?▼

Yes, you can use FirstPersonControls and TrackballControls alongside raycasting in Three.js. This skill includes built-in support for multiple camera control schemes, allowing flexible navigation combined with object selection.

Why does my Three.js raycasting return the wrong object on click?▼

Three.js raycasting can return the wrong object if input coordinates are not correctly normalized to the canvas viewport or if the camera projection is mismatched. This skill provides reusable patterns to reduce these common boilerplate errors.