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The latest version of Draco brings a number of new compression
enhancements for even smaller models:
- Improved compression
- Up to 40% better compression of normals
- Up to 5% better compression for models with multiple attributes
- Faster decode speeds
- 30% faster decoding for models with multiple attributes for lower compression levels 4 and below
- Note: Decreases compression by 10%.
- Encoding of metadata to .obj (e.g. Draco can preserve material or sub-object names)
- Security fixes
74 lines
2.5 KiB
Markdown
74 lines
2.5 KiB
Markdown
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<p align="center">
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<img src="https://github.com/google/draco/raw/master/docs/DracoLogo.jpeg" />
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</p>
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News
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=======
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### Version 1.1.0 release
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The latest version of Draco brings a number of new compression enhancements for
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even smaller models:
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* Improved compression
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* Up to 40% better compression of normals
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* Up to 5% better compression for models with multiple attributes
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* Faster decode speeds
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* 30% faster decoding for models with multiple attributes for lower compression levels 4 and below
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* Note: Decreases compression by 10%.
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* Encoding of metadata to .obj (e.g. Draco can preserve material or sub-object names)
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* Security fixes
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Description
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===========
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[Draco] is a library for compressing and decompressing 3D geometric [meshes] and
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[point clouds]. It is intended to improve the storage and transmission of 3D
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graphics.
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Draco was designed and built for compression efficiency and speed. The code
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supports compressing points, connectivity information, texture coordinates,
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color information, normals, and any other generic attributes associated with
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geometry. With Draco, applications using 3D graphics can be significantly
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smaller without compromising visual fidelity. For users, this means apps can
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now be downloaded faster, 3D graphics in the browser can load quicker, and VR
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and AR scenes can now be transmitted with a fraction of the bandwidth and
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rendered quickly.
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[Draco] is released as C++/Javascript source code that can be used to compress 3D
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graphics as well as decoders for the encoded data.
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NPM Package
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===========
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The code shows a simple example of using Draco encoder and decoder with Node.js.
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`draco_encoder_node.js` and `draco_decoder_node.js` are modified Javascript
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encoding/decoding files that are compatible with Node.js.
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`draco_nodejs_example.js` has the example code for usage.
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How to run the code:
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(1) Install draco3d package :
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~~~~~ bash
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$ npm install draco3d
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~~~~~
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(2) Run example code to test:
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~~~~~ bash
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$ cp node_modules/draco3d/draco_nodejs_example.js .
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$ cp node_modules/draco3d/bunny.drc .
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$ node draco_nodejs_example.js
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~~~~~
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The code loads the [Bunny] model, it will first decode to a mesh
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and then encode it with different settings.
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References
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==========
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[Draco]: https://github.com/google/draco
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[meshes]: https://en.wikipedia.org/wiki/Polygon_mesh
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[point clouds]: https://en.wikipedia.org/wiki/Point_cloud
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[Bunny]: https://graphics.stanford.edu/data/3Dscanrep/
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Bunny model from Stanford's graphic department <https://graphics.stanford.edu/data/3Dscanrep/>
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