Three.js Earth Render

Workflow

1. Use scripts/render_threejs_earth.py from this skill.
2. Pass --workspace when the user specifies where the source checkout should live; otherwise use the current directory.
3. Pass --output when the user specifies a GIF/MP4 path; otherwise use out/threejs-earth.gif.
4. For customized routes, edit threejs-earth/src/routeConfig.js first and render with --skip-update so local edits are preserved.
5. Run the script and wait for completion.
6. Return the final absolute output path printed by the script.

Command

/usr/local/bin/python3 scripts/render_threejs_earth.py \
  --workspace "$(pwd)" \
  --output "$(pwd)/out/threejs-earth.gif"

Installed Skill Resolution

Use the installed skill copy, not the source repo checkout:

skill_dir=""
for base in "${AGENTS_HOME:-$HOME/.agents}" "${CLAUDE_HOME:-$HOME/.claude}" "${CODEX_HOME:-$HOME/.codex}"; do
  if [ -d "$base/skills/threejs-earth-render" ]; then
    skill_dir="$base/skills/threejs-earth-render"
    break
  fi
done
[ -n "$skill_dir" ] || { echo "threejs-earth-render skill not found under ~/.agents, ~/.claude, or ~/.codex"; exit 1; }

/usr/local/bin/python3 "$skill_dir/scripts/render_threejs_earth.py" \
  --workspace "$(pwd)" \
  --output "$(pwd)/out/threejs-earth.gif"

Behavior

• Repository source is fixed to https://github.com/vibe-motion/threejs-earth.git by default.
• Reuse workspace/threejs-earth if it exists; otherwise clone it.
• If the repo already exists, fetch and fast-forward the target branch unless --skip-update is passed.
• Serve the Three.js app through a local HTTP server; do not open it with file://.
• Use Puppeteer, not Remotion, because this is a browser-based 3D scene.
• Seek each frame through window.__SCENE_3D_EXPORT__.setFrame(frame) so frames are independently reproducible.
• Capture a PNG frame sequence, then encode .gif or .mp4 with ffmpeg.
• Default render is a 30 fps GIF at 448 px wide. Use --output-width 0 to keep the native 2048 x 1152 capture.

Project Notes

• Default route is Hangzhou to Paris in src/routeConfig.js.
• The app exports a 16:9 scene at 2048 x 1152 for --render-scale 1 and 4096 x 2304 for --render-scale 2.
• The scene uses CDN imports for Three.js and local high-resolution Earth texture assets, so network access is required on first load.

Requirements

• git
• node
• npm
• ffmpeg
• network access for clone/update, CDN imports, and Puppeteer installation