Faster 3D models in Cesium 1.10

CesiumJS
1

Folks,

There’s a new checkbox in the online Cesium model converter to generate a new binary version of glTF. These models load faster in Cesium, especially for models with a lot of geometry.

Check out the blog post for more details:

http://cesiumjs.org/2015/06/01/Binary-glTF/

Patrick

2

Thanks Patrick. I think this new feature will be really helpful.

3

Hi, Patrick

Do you have plan to release the binary-gltf for off-line collada2gltf model converter?

I have converted 10,000+ building models to gltf format, and design a multi-scale LoD scheme for rendering those models.

refer to the website: http://118.163.99.116:8080/Apps/3Dbuilding.html

The binary-gltf should be helpful for raising the performance.

In addition, I observe the performance is browser-dependency:

IE: higher priority for showing building models,but imageryLayers are shown slowly.

Chrome: imageryLayers first, sometimes are pending for showing building models.

Firefox: balance for imageryLayers and building models.

Have any suggestion?

Kevin

4

Hello

@Kevin Sun

I wrote a small java/groovy script to convert collada files to binary-glTF using the collada2gltf.exe converter.

You can find the script at https://github.com/virtualcitySYSTEMS/colladaToBglTFConverter.

we testet the script with some of our own collada files and had no problems, but we didn’t do comprehensive tests, so use it at your own risk.

Best regards

Jannes

5

@Kevin - we do not plan to release the code since it is pretty tightly integrated into AGI’s model pipeline. However, to help binary glTF adoption, I am very interested in someone contributing binary glTF support to COLLADA2GLTF. I would be happy to promote their work.

@Jannes - awesome, thanks so much for sharing this. I added a link to it to the draft extension.

Patrick

6

Hi Patrick,

could you please take a look at this issue on the collada2glTF-github website?
https://github.com/KhronosGroup/glTF/issues/391

thanks

Zhihang

7

Hi Zhihang,

Have you tried the troubleshooting section here: https://cesiumjs.org/2014/03/03/Cesium-3D-Models-Tutorial/

If there is something wrong with the Cesium online converter, we can take a closer look, but we do not have the bandwidth right now to fix issues in COLLADA2GLTF that do not also affect the online converter.

Patrick

8

@jbo023

Thanks for your binary-glTF converter. It works fine for our 3D building models.

The performance seems have been improved!

Kevin

9

Hi Jannes,

Today we announced glTF 1.0 and the KHR_binary_glTF extension. Cesium 1.15 will ship with support for these on November 2. It would be great if you could update colladaToBglTFConverter.

See this thread for details.

Patrick