Dependencies

Major dependencies per workspace package, grouped by the middleware server + offline converters (Packages), the viewer, and the docs site.

Dependencies are grouped into three areas: Packages (the middleware server + every offline converter — packages/*), Viewer (apps/viewer and the legacy viewer.html), and a short mention of apps/docs's own tooling. Versions aren't tracked here — see each package's own package.json/ lockfile for what's currently resolved.

Packages

The middleware server (packages/tile-server) and every offline <fmt>-to-3dtiles converter, plus the shared core and meta-converter, as one workspace group.

`packages/core` (`3dtiles-convert-core`)

Package	Used by
`@gltf-transform/core`	glTF read/write, shared by every converter
`@gltf-transform/extensions`	glTF extension (de)registration
`@gltf-transform/functions`	glTF-Transform pipeline ops (`/gltf` decompress)
`three`	Basis/KTX2 transcoding support
`draco3dgltf`	Draco geometry decode/encode registration
`ktx-parse`	KTX2 container parsing
`ktx2-encoder`	in-process KTX2 (ETC1S/UASTC) WASM encoder
`@jsquash/webp`	WebP decode (SOG textures)
`pngjs`	pure-JS PNG encode (KTX2→PNG decompress path)
`jpeg-js`	pure-JS JPEG decode/encode

`packages/convert` (meta CLI/SDK)

Package	Used by
`fflate`	zip read (remote directory-format mirroring)
`sql.js`	`.3dtiles` package output
workspace: `copc-to-3dtiles`, `potree-to-3dtiles`, `rad-to-3dtiles`, `sog-to-3dtiles`, `lcc-to-3dtiles`, `i3s-to-3dtiles`, `3dtiles-convert-core`	per-format converters

`packages/tile-server`

Package	Used by
`copc`	`/stream?format=copc` range adapter
`proj4`	live georeferencing (COPC/Potree/I3S)
`@loaders.gl/i3s`	`/stream?format=i3s`
`@loaders.gl/zip`	`.3tz` / SLPK zip random access
`@playcanvas/splat-transform`	`/stream?format=sog`, `/extract` splat merge
workspace: `3dtiles-convert-core`, `3dtiles-tools`, `i3s-to-3dtiles`, `implicit-to-explicit`	shared decode/encode + tileset transforms

`packages/copc-to-3dtiles`

Package	Used by
`copc`	COPC/LAZ read (via `laz-perf` WASM)
`@gltf-transform/core`	GLB tile output
`proj4`	WKT CRS → ECEF root transform

`packages/potree-to-3dtiles`

Package	Used by
`@gltf-transform/core`	GLB tile output
`copc`	tiled-LAZ node decode (`laz-perf`)

`packages/rad-to-3dtiles`

Package	Used by
`@sparkjsdev/spark`	RAD format reference (`build-lod` output)
`@gltf-transform/core`	GLB tile output

`packages/sog-to-3dtiles`

Package	Used by
`@playcanvas/splat-transform`	`readSog` WebP-chunk decode → `DataTable`

`packages/lcc-to-3dtiles`

No third-party runtime dependencies — pure-JS DataView decode of meta.lcc/Index.bin/Data.bin.

`packages/i3s-to-3dtiles`

Package	Used by
`@loaders.gl/core`	SLPK/zip + fetch plumbing
`@loaders.gl/i3s`	I3S schema types/helpers
`@loaders.gl/polyfills`	Node polyfills for loaders.gl
`@loaders.gl/tiles`	tile-tree traversal helpers

`packages/threemx-to-3dtiles`

No third-party runtime dependencies — vendors its own OpenCTM (js-openctm) decode logic in-tree.

`packages/3dtiles-tools`

Package	Used by
`gltf-pipeline`	glTF 1.0→2.0 upgrade (legacy b3dm content)
`3d-tiles-tools`	real CesiumGS package, wired as `tool=upgrade-real` on `/3dtiles-tools`
workspace: `3dtiles-convert-core`, `implicit-to-explicit`	tileset-level transforms

`packages/implicit-to-explicit`

Workspace-only dependency: 3dtiles-convert-core (shared octree/geo helpers).

Viewer

apps/viewer (the standalone React app, "3D Tiled") and the legacy viewer.html/vanilla-viewer.html.

`apps/viewer` (3D Tiled — React app)

Package	Used by
`react` / `react-dom`	app framework
`@react-three/fiber`	R3F renderer for the 3DTRJS viewport
`@react-three/drei`	R3F helpers (`<TransformControls>` crop gizmo, etc.)
`3d-tiles-renderer`	3D Tiles rendering (official `/r3f` export)
`3d-tiles-rendererjs-3dgs-plugin`	Gaussian-splat plugin for 3DTRJS
`@sparkjsdev/spark`	splat rendering backend
`cesium`	CesiumJS viewport
`three`	shared 3D engine (deduped with 3DTRJS/Spark)
`three-mesh-bvh`	BVH acceleration for 3DTRJS
`zustand`	app state (crop bbox, camera readouts, status log)
`nuqs`	shareable URL-param state (format/mode/cache/preset/…)
`@radix-ui/react-*` (checkbox, collapsible, dialog, label, scroll-area, select, separator, slider, slot, toggle, toggle-group)	shadcn/ui primitives
`class-variance-authority`	shadcn/ui variant styling
`clsx`	conditional class names
`tailwind-merge`	Tailwind class merging (shadcn/ui)
`lucide-react`	icon set
`tailwindcss` / `@tailwindcss/postcss`	styling
`vite`	dev server / build
`@vitejs/plugin-react`	React Fast Refresh for Vite
`vite-plugin-cesium`	Cesium static asset copying
`typescript`	type checking

Legacy `vanilla-viewer.html`

The original, pre-React standalone page now lives entirely inside apps/viewer/vanilla-viewer.html, built as a second Vite entry point alongside the React app — it shares that package's own dependencies listed above (Cesium, three, 3d-tiles-renderer, the 3DGS plugin, SparkJS, vite-plugin-cesium) as genuine npm packages bundled by Vite (vite-plugin-cesium copies Cesium's static assets; three is deduped via resolve.dedupe), not CDN-loaded. There is no separate root copy or root-level deps for it anymore. See Viewer for how it's served.

The only root-level dev dependency is concurrently, which runs pnpm dev's viewer+docs+tile-server processes in parallel; sql.js (used for .3dtiles package reading) lives in packages/convert's own package.json (see above), not the root.

Docs site

Fumadocs (fumadocs-core/fumadocs-ui/fumadocs-mdx) powers this documentation site — see its own docs and repo for its dependency tree, not itemized here.
Scalar powers the API reference/playground in two places: a standalone webapp at the tile-server's own /playground route (packages/tile-server/homepage-live.js, loaded from Scalar's CDN script) and an embedded page in this Fumadocs site (/docs/api-reference, via @scalar/api-reference-react). See Scalar's own docs and repo.

Optional / conditionally-used:

better-sqlite3 — only needed for local .3dtiles package writing/serving via native SQLite; the read path uses sql.js (pure WASM) instead, so it's optional (pnpm add -w better-sqlite3, needs a C++ build toolchain).

Dependencies

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