mirror of https://github.com/CesiumGS/obj2gltf.git
101 lines
3.6 KiB
Markdown
101 lines
3.6 KiB
Markdown
# OBJ2GLTF
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Convert OBJ assets to [glTF](https://www.khronos.org/gltf) 1.0.
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## Getting Started
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Install [Node.js](https://nodejs.org/en/) if you don't already have it, and then:
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```
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npm install --save obj2gltf
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```
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Using obj2gltf as a library:
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```javascript
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var obj2gltf = require('obj2gltf');
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var options = {
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separateTextures : true // Don't embed textures in the converted glTF
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}
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obj2gltf('model.obj', 'model.gltf', options)
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.then(function() {
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console.log('Converted model');
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});
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```
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Using obj2gltf as a command-line tool:
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`node bin/obj2gltf.js -i model.obj`
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`node bin/obj2gltf.js -i model.obj -o model.gltf`
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## Usage
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### Command line flags:
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|Flag|Description|Required|
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|----|-----------|--------|
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|`-h`, `--help`|Display help.|No|
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|`-i`, `--input`|Path to the obj file.| :white_check_mark: Yes|
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|`-o`, `--output`|Path of the converted glTF file.|No|
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|`-b`, `--binary`|Save as binary glTF.|No, default `false`|
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|`-s`, `--separate`|Writes out separate geometry data files, shader files, and textures instead of embedding them in the glTF file.|No, default `false`|
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|`-t`, `--separateTextures`|Write out separate textures only.|No, default `false`|
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|`-c`, `--compress`|Quantize positions, compress texture coordinates, and oct-encode normals.|No, default `false`|
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|`-z`, `--optimize`|Use the optimization stages in the glTF pipeline.|No, default `false`|
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|`-n`, `--generateNormals`|Generate normals if they are missing.|No, default `false`|
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|`--optimizeForCesium`|Optimize the glTF for Cesium by using the sun as a default light source.|No, default `false`|
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|`--ao`|Apply ambient occlusion to the converted model.|No, default `false`|
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|`--kmc`|Output glTF with the KHR_materials_common extension.|No, default `false`|
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|`--bypassPipeline`|Bypass the gltf-pipeline for debugging purposes. This option overrides many of the options above and will save the glTF with the KHR_materials_common extension.|No, default `false`|
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|`--checkTransparency`|Do a more exhaustive check for texture transparency by looking at the alpha channel of each pixel. By default textures are considered to be opaque.|No, default `false`|
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|`--secure`|Prevent the converter from reading image or mtl files outside of the input obj directory.|No, default `false`|
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|`--inputUpAxis`|Up axis of the obj. Choices are 'X', 'Y', and 'Z'.|No, default `Y`|
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|`--outputUpAxis`|Up axis of the converted glTF. Choices are 'X', 'Y', and 'Z'.|No, default `Y`|
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## Build Instructions
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Run the tests:
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```
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npm run test
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```
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To run ESLint on the entire codebase, run:
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```
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npm run eslint
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```
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To run ESLint automatically when a file is saved, run the following and leave it open in a console window:
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```
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npm run eslint-watch
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```
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## Running Test Coverage
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Coverage uses [nyc](https://github.com/istanbuljs/nyc). Run:
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```
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npm run coverage
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```
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For complete coverage details, open `coverage/lcov-report/index.html`.
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The tests and coverage covers the Node.js module; it does not cover the command-line interface, which is tiny.
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## Generating Documentation
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To generate the documentation:
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```
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npm run jsdoc
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```
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The documentation will be placed in the `doc` folder.
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## Debugging
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* To debug the tests in Webstorm, open the Gulp tab, right click the `test` task, and click `Debug 'test'`.
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* To run a single test, change the test function from `it` to `fit`.
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## Contributions
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Pull requests are appreciated. Please use the same [Contributor License Agreement (CLA)](https://github.com/AnalyticalGraphicsInc/cesium/blob/master/CONTRIBUTING.md) used for [Cesium](http://cesiumjs.org/).
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---
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Developed by the Cesium team.
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<p align="center">
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<a href="http://cesiumjs.org/"><img src="doc/cesium.png" onerror="this.src='cesium.png'"/></a>
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</p>
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