This viewer adapts the user-supplied STP_Viewer_Web_2.html.
Its embedded Three.js and occt-import-js JavaScript and WebAssembly binaries
were extracted without modification. Mesh merging is retained from that file.

Three.js r160: Copyright 2010-2023 Three.js Authors. MIT license.
Source: https://github.com/mrdoob/three.js/tree/r160
License: https://github.com/mrdoob/three.js/blob/r160/LICENSE

occt-import-js: LGPL-2.1. Full license in OCCT-IMPORT-LICENSE.txt.
Source and build instructions: https://github.com/kovacsv/occt-import-js
Open CASCADE Technology: LGPL-2.1 with the Open CASCADE exception.
Source: https://github.com/Open-Cascade-SAS/OCCT
License: https://dev.opencascade.org/resources/licensing
The source HTML did not identify an exact occt-import-js release.
The separated JS/WASM files can be replaced with compatible rebuilt versions.

The sample luna-block.step was generated for this viewer and is released
under CC0-1.0. Its dimensions are 60 x 40 x 12 millimeters.