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- <h1>[name]</h1>
- <p class="desc">
- An exporter to compress geometry with the Draco library. <br /><br />
- [link:https://google.github.io/draco/ Draco] is an open source library for compressing and
- decompressing 3D meshes and point clouds. Compressed geometry can be significantly smaller,
- at the cost of additional decoding time on the client device.
- </p>
- <p>
- Standalone Draco files have a `.drc` extension, and contain vertex positions,
- normals, colors, and other attributes. Draco files *do not* contain materials,
- textures, animation, or node hierarchies – to use these features, embed Draco geometry
- inside of a glTF file. A normal glTF file can be converted to a Draco-compressed glTF file
- using [link:https://github.com/AnalyticalGraphicsInc/gltf-pipeline glTF-Pipeline].
- </p>
- <h2>Import</h2>
- <p>
- [name] is an add-on, and must be imported explicitly.
- See [link:#manual/introduction/Installation Installation / Addons].
- </p>
- <code>
- import { DRACOExporter } from 'three/addons/exporters/DRACOExporter.js';
- </code>
- <h2>Code Example</h2>
- <code>
- // Instantiate a exporter
- const exporter = new DRACOExporter();
- // Parse the input and generate the DRACO encoded output
- const binaryData = exporter.parse( mesh, options );
- </code>
- <h2>Examples</h2>
- <p>
- [example:misc_exporter_draco]
- </p>
- <h2>Constructor</h2>
- <h3>[name]()</h3>
- <p>
- Creates a new [name].
- </p>
- <h2>Methods</h2>
- <h3>[method:Int8Array parse]( [param:Mesh object] | [param:Points object], [param:Object options] )</h3>
- <p>
- [page:Mesh object] | [page:Points object] — Mesh or Points to encode.<br />
- [page:Options options] — Optional export options<br />
- <ul>
- <li>decodeSpeed - int. Indicates how to tune the encoder regarding decode speed (0 gives better speed but worst quality). Default is 5</li>
- <li>encodeSpeed - int. Indicates how to tune the encoder parameters (0 gives better speed but worst quality). Default is 5.</li>
- <li>encoderMethod - int. Either sequential (very little compression) or Edgebreaker. Edgebreaker traverses the triangles of the mesh in a deterministic, spiral-like way which provides most of the benefits of this data format. Default is DRACOExporter.MESH_EDGEBREAKER_ENCODING.</li>
- <li>quantization - Array of int. Indicates the presision of each type of data stored in the draco file in the order (POSITION, NORMAL, COLOR, TEX_COORD, GENERIC). Default is [ 16, 8, 8, 8, 8 ]</li>
- <li>exportUvs - bool. Default is true.</li>
- <li>exportNormals - bool. Default is true.</li>
- <li>exportColor - bool. Default is false.</li>
- </ul>
- </p>
- <h2>Source</h2>
- <p>
- [link:https://github.com/mrdoob/three.js/blob/master/examples/jsm/exporters/DRACOExporter.js examples/jsm/exporters/DRACOExporter.js]
- </p>
- </body>
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