Three.js interaction - raycasting, controls, mouse/touch input, object selection. Use when handling user input, implementing click detection, adding camera controls, or creating interactive 3D experiences.
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---
name: threejs-interaction
description: Three.js interaction - raycasting, controls, mouse/touch input, object selection. Use when handling user input, implementing click detection, adding camera controls, or creating interactive 3D experiences.
risk: critical
source: community
date_added: "2026-03-06"
---
# Three.js Interaction
## Detailed Guide
Read [the detailed guide](references/detailed-guide.md) before executing this skill. It retains the complete procedure and reference material. Treat its safety, prerequisites, and validation requirements as mandatory. For focused work, load the relevant sections; for end-to-end work, read the guide completely.
## When to Use
- You need user interaction inside a Three.js scene.
- The task involves raycasting, object picking, pointer handling, touch input, or camera controls.
- You are building an interactive 3D experience rather than a passive render.
## Example
```text
Add pointer selection to this canvas using its bounding rectangle, test after resize/scroll and provide keyboard selection. Dispose listeners/controls on unmount and verify picking nested meshes.
```
## Limitations
- Use this skill only when the task clearly matches the scope described above.
- Do not treat the output as a substitute for environment-specific validation, testing, or expert review.
- Stop and ask for clarification if required inputs, permissions, safety boundaries, or success criteria are missing.
