mirror of
https://git.mirrors.martin98.com/https://github.com/google/draco
synced 2025-07-31 15:41:59 +08:00
f2f4efbc20
* Fix 'node' global name in node.js example. * Include GitHub URL with npm package.json. * Simplify Node.js usage example. * Correct attribute stride. * Correct numVertexCoord -> numItems. * Fix typo on attr constant. * Simplify loop iteration.
80 lines
2.6 KiB
Markdown
80 lines
2.6 KiB
Markdown
|
|
<p align="center">
|
|
<img src="https://github.com/google/draco/raw/master/docs/DracoLogo.jpeg" />
|
|
</p>
|
|
|
|
News
|
|
=======
|
|
### Version 1.0.0 release
|
|
The latest version of Draco brings many new enhancements to improve the
|
|
development experience:
|
|
* Stable API release
|
|
* Support for npm Javascript package management
|
|
* Javascript based encoder
|
|
* Generalized metadata for meshes and point clouds
|
|
* Now supporting material properties included along with encoded file
|
|
* Improved compression rates:
|
|
* 15% better compression on smaller models
|
|
* 40% better compression of normals
|
|
* Performance improvements (~10% faster encoding, decoding)
|
|
* Reduced GPU memory usage:
|
|
* Option to store decoded quantized attributes
|
|
* Support for triangle strip connectivity on decoded meshes
|
|
* iOS 9 Javascript decoder
|
|
* Bitstream specification now available
|
|
|
|
Description
|
|
===========
|
|
|
|
[Draco] is a library for compressing and decompressing 3D geometric [meshes] and
|
|
[point clouds]. It is intended to improve the storage and transmission of 3D
|
|
graphics.
|
|
|
|
Draco was designed and built for compression efficiency and speed. The code
|
|
supports compressing points, connectivity information, texture coordinates,
|
|
color information, normals, and any other generic attributes associated with
|
|
geometry. With Draco, applications using 3D graphics can be significantly
|
|
smaller without compromising visual fidelity. For users, this means apps can
|
|
now be downloaded faster, 3D graphics in the browser can load quicker, and VR
|
|
and AR scenes can now be transmitted with a fraction of the bandwidth and
|
|
rendered quickly.
|
|
|
|
[Draco] is released as C++/Javascript source code that can be used to compress 3D
|
|
graphics as well as decoders for the encoded data.
|
|
|
|
NPM Package
|
|
===========
|
|
|
|
The code shows a simple example of using Draco encoder and decoder with Node.js.
|
|
`draco_encoder_node.js` and `draco_decoder_node.js` are modified Javascript
|
|
encoding/decoding files that are compatible with Node.js.
|
|
`draco_nodejs_example.js` has the example code for usage.
|
|
|
|
How to run the code:
|
|
|
|
(1) Install draco3d package :
|
|
|
|
~~~~~ bash
|
|
$ npm install draco3d
|
|
~~~~~
|
|
|
|
(2) Run example code to test:
|
|
|
|
~~~~~ bash
|
|
$ cp node_modules/draco3d/draco_nodejs_example.js .
|
|
$ cp node_modules/draco3d/bunny.drc .
|
|
$ node draco_nodejs_example.js
|
|
~~~~~
|
|
|
|
The code loads the [Bunny] model, it will first decode to a mesh
|
|
and then encode it with different settings.
|
|
|
|
References
|
|
==========
|
|
[Draco]: https://github.com/google/draco
|
|
[meshes]: https://en.wikipedia.org/wiki/Polygon_mesh
|
|
[point clouds]: https://en.wikipedia.org/wiki/Point_cloud
|
|
[Bunny]: https://graphics.stanford.edu/data/3Dscanrep/
|
|
|
|
Bunny model from Stanford's graphic department <https://graphics.stanford.edu/data/3Dscanrep/>
|