Show HN: Find someone in the dark – light them or light yourself? (Three.js)

2026-07-18 | original

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Why This Matters

This experiment highlights innovative visual search strategies using Three.js, offering insights into how different lighting tactics can impact search-and-rescue scenarios. While conceptual, it encourages further exploration of tech-driven rescue methods that could enhance efficiency and safety in real-world operations.

Key Takeaways

Different lighting strategies can influence search effectiveness in rescue scenarios.
The experiment demonstrates the potential of web-based visualizations for simulating complex search patterns.
Further development could integrate real-world variables to improve rescue operations using technology.

Signal in the Dark

A one-page Three.js experiment comparing two simplified strategies:

Sweep searchlight: the rescuer moves through an expanding search pattern and must illuminate the missing person.

the rescuer moves through an expanding search pattern and must illuminate the missing person. Raise beacon: the rescuer stays put while a mobile missing person tries to recognize and approach an omnidirectional light.

Run

cd signal-in-the-dark python3 -m http.server 8080

Open http://localhost:8080 .

The page imports Three.js from a pinned CDN URL, so the first load needs internet access.

Experiment

Use the presets first:

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Explore topics: three.js search-and-rescue beacon signal-in-the-dark monte carlo