Can we encode and transform glb files into draco glb format using only frontend technologies (client side)?
Can we encode and transform glb files into draco glb format using only frontend technologies (client side)?
A solution for this task is to utilize glTF-Transform. Additionally, there is a pending feature request on three.js that has not been implemented yet.
To begin the implementation process, you will first need to download the Draco encoder/decoder libraries (note that current NPM versions are not suitable for client-side use). These libraries should be hosted in a designated folder and loaded as global script tags. There are six required files, each of which needs to be accompanied by a script tag to complete the setup.
List of Files:
<script src="assets/draco_encoder.js"></script>
<script src="assets/draco_decoder.js"></script>
Subsequently, coding is required to load a GLB file, implement compression, and perform actions with the compressed output. The initial step involves installing the two specified packages below and then bundling the web application using a preferred tool (such as ).
import { WebIO } from '@gltf-transform/core';
import { DracoMeshCompression } from '@gltf-transform/extensions';
const io = new WebIO()
.registerExtensions([DracoMeshCompression])
.registerDependencies({
'draco3d.encoder': await new DracoEncoderModule(),
'draco3d.decoder': await new DracoDecoderModule(),
});
// Loading an uncompressed GLB file.
const document = await io.read('./assets/Duck.glb');
// Configuring compression settings.
document.createExtension(DracoMeshCompression)
.setRequired(true)
.setEncoderOptions({
method: DracoMeshCompression.EncoderMethod.EDGEBREAKER,
encodeSpeed: 5,
decodeSpeed: 5,
});
// Creating compressed GLB file as an ArrayBuffer.
const arrayBuffer = io.writeBinary(document); // ArrayBuffer
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