OBJLoader2 & OBJLoader2Parallel for three.js

OBJLoader2 is a loader for the OBJ file format. It is an alternative to OBJLoader included in three.js. The loader and its parser can be used on Main via OBJLoader2 or in parallel inside a web worker via OBJLoader2Parallel.

Project History

New versions of OBJLoader2 and OBJLoader2Parallel are from now on again released as npm modules independent of three.js. The first stable version that was released independent again is 4.0.0. Versions 3.x.y were never released as independent npm and only in combination with three.ts itself.

Between release of version 5.0.0 and 6.0.0 all code has been transformed to TypeScript.

Changelog

Interested in recent changes? Check the CHANGELOG.

Development

Getting Started

There exist three possibilities:

• Checkout the repository and run npm install, npm run build and then npm run dev to spin up local Vite dev server
• Press the Gitpod button above and start coding and using the examples directly in the browser
• Checkout the repository and use docker-compose up -d to spin up local Vite dev server.

Whatever environment you choose to start Vite is used to serve the code and the examples using it. With this setup you are able to change the code and examples without invoking an additional bundler. Vite ensures all imported npm modules are available if previously installed in local environment (see npm install).

If you run Vite locally you require a nodejs LTS and npm. The Gitpod and local docker environment ensure all prerequisites are fulfilled.

In any environment the server is reachable on port 8085.

Examples

If you want to get started see take a look at the following examples. They get more advanced from top to bottom:

• OBJLoader2 basic usage: [html] [ts]
• OBJLoader2Parallel basic: [html] [ts]
• OBJLoader2 usage options: [html] [ts]
• OBJLoader2 / OBJLoader parser capability comparison: [html] [ts]
• OBJLoader2 in react with a .jpg texture: [html] [tsx]
• OBJLoader2 in react with a .mtl material: [html] [tsx]
• AssetPipelineLoader basic example: [html] [ts]

Main Branch

Main development now takes place on branch main. Tags identify the releases. The stable branch has been retired.

Feature Overview

OBJLoader2Parser

The parser OBJLoader2Parser used by OBJLoader2 and OBJLoader2Parallel has all OBJ parsing capabilities of OBJLoader from three.js, plus some extra feature. Please see the following list:

• The parse methods of OBJLoader2Parser accepts ArrayBuffer or String as input. Text processing is approx. 15-20 pecent slower.
• In case OBJLoader2Parallel the of Parser OBJLoader2Parser is executed inside a worker.
• OBJLoader2Parser features indexed rendering including vertex reduction.
• Indexed rendering is available if switched on via setUseIndices (see useIndices in example OBJLoader2 usage options).
• Face N-Gons are supported.
• Multi-Materials are created when needed.
• Flat smoothing defined by "s 0" or "s off" is supported and Multi-Material is created when one object/group defines both smoothing groups equal and not equal to zero.
• Support for points and lines is available since V2.3.0.
• New mesh detection relies on 'g' occurrence or 'f', 'l' or 'p' type change (since V2.3.0). This allows multiple mesh definitions within one group.
• Negative face indices are supported (issue #28)
• The parser is now a single class that can be directly stored as string and therefore embedded in module or standard Workers (since V4.0.0).

WorkerTaskDirector Core Library

WorkerTask from wtd-core is used to control everything regarding workers. This library was separated with the 4.0.0 release. It now evolves as independent library that is utilized by OBJLoader2Parallel.

Docs

Run npm run doc to create the documentation in [directory]((./packages/objloader2/docs).

Happy coding!

Kai