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feat(3dtiles): add method to enable ktx2 loader for gltf
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# Basis Universal GPU Texture Compression | ||
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Basis Universal is a "[supercompressed](http://gamma.cs.unc.edu/GST/gst.pdf)" | ||
GPU texture and texture video compression system that outputs a highly | ||
compressed intermediate file format (.basis) that can be quickly transcoded to | ||
a wide variety of GPU texture compression formats. | ||
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[GitHub](https://github.com/BinomialLLC/basis_universal) | ||
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## Transcoders | ||
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Basis Universal texture data may be used in two different file formats: | ||
`.basis` and `.ktx2`, where `ktx2` is a standardized wrapper around basis texture data. | ||
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For further documentation about the Basis compressor and transcoder, refer to | ||
the [Basis GitHub repository](https://github.com/BinomialLLC/basis_universal). | ||
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The folder contains two files required for transcoding `.basis` or `.ktx2` textures: | ||
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* `basis_transcoder.js` — JavaScript wrapper for the WebAssembly transcoder. | ||
* `basis_transcoder.wasm` — WebAssembly transcoder. | ||
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Both are dependencies of `KTX2Loader`: | ||
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```js | ||
const ktx2Loader = new KTX2Loader(); | ||
ktx2Loader.setTranscoderPath( 'examples/jsm/libs/basis/' ); | ||
ktx2Loader.detectSupport( renderer ); | ||
ktx2Loader.load( 'diffuse.ktx2', function ( texture ) { | ||
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const material = new THREE.MeshStandardMaterial( { map: texture } ); | ||
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}, function () { | ||
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console.log( 'onProgress' ); | ||
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}, function ( e ) { | ||
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console.error( e ); | ||
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} ); | ||
``` | ||
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## License | ||
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[Apache License 2.0](https://github.com/BinomialLLC/basis_universal/blob/master/LICENSE) |
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