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minsung b114581c07 feat: React19+HMDesign shell with ported DWG/DXF viewer engine

Scaffolds the new app (Vite+React19+Tailwind v4) on HMDesign via git
submodule + npm workspace, ports src/viewer2d/* and optionsStore.ts
unchanged, and rebuilds the vanilla UI (toolbar/layers/properties/
options panels, coord readout, license dialog, load progress) as HM
Design System components. Panel drag/collapse ported from
panelUtils.ts as a React hook; Measure UI intentionally left
unwired per original app parity.

Typecheck and dev-server module serving verified; in-browser
rendering not yet verified in this session (no browser tool
available) — needs manual check.

Refs #1

2026-10-12 17:42:58 +09:00

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Third-party notices

This viewer bundles third-party code. The notices below apply to the source tree and to the built site (dist2/, deployed at https://dwg-dxf-viewer-sample.pages.dev/), because the build embeds the components listed here.

Served copies of the license texts live under public/licenses/ → /licenses/… on the deployed site.

acadrust 0.4.1 — Mozilla Public License 2.0 — MODIFIED


Component	`acadrust` (DWG/DXF parser, Rust)
Version	0.4.1
License	MPL-2.0 — full text: `public/licenses/acadrust-MPL-2.0.txt` (`/licenses/acadrust-MPL-2.0.txt`)
Upstream	https://github.com/hakanaktt/acadrust · https://crates.io/crates/acadrust/0.4.1
Upstream commit	`f249c2f816acf36ee51cd5533716bdd443c2517e` (from the crate's `.cargo_vcs_info.json`)
Author	Hakan AK
Shipped as	compiled into `assets/acadrust_dwg_bg-*.wasm` (Executable Form)

This copy is modified. One file differs from the published crate:

src/io/dwg/dwg_stream_readers/object_reader/entities.rs   (read_mesh array-count bounds)

The modification bounds read_mesh's array counts by the bits remaining in the object stream instead of the blanket 100 000-item guard, which truncated and thereby corrupted large SubD meshes.

How to obtain the Source Code Form (MPL-2.0 §3.2)

Get the unmodified crate source — cargo vendor, or https://crates.io/api/v1/crates/acadrust/0.4.1/download, or the upstream commit above.
Apply public/licenses/acadrust-0.4.1-read_mesh.patch (/licenses/acadrust-0.4.1-read_mesh.patch on the deployed site):
```
tar xf acadrust-0.4.1.crate && cd acadrust-0.4.1
patch -p1 < acadrust-0.4.1-read_mesh.patch
```

The result is the exact Source Code Form of the acadrust code compiled into the shipped .wasm. Both the original and the modified file remain under MPL-2.0.

dwg-wasm — MIT

The wasm-bindgen wrapper that turns acadrust output into this viewer's parseResult (hmwebviewer/rust/dwg-wasm/). Our own code, MIT. MPL-2.0 §3.3 permits distributing this Larger Work under different terms as long as the MPL-covered files above keep their license — which they do.

Other components

Component	License
three.js	MIT
dxf-parser	MIT
opentype.js	MIT
NanumGothic (`public/fonts/`)	SIL Open Font License 1.1
Viewer2D / sample glue	MIT

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