vsg model to 3dtiles?

[wuvalue]

I want to create a model using VSG and convert it to 3dtiles format. How can I technically achieve this step? Can everyone give some suggestions?

[robertosfield]

I have moved this questions to the Discussions form as it isn't a bug/build issues with the VSG itself but a user questions.

As for converting VSG scene graph to 3DTiles, there is currently only @timoore's vsgCshttps://github.com/timoore/vsgCs library that that is able to load and render 3DTiles datasets within VSG applications. I don't know if this has able capability to converting back.

As a general comment, 3DTiles is related to the glTF format, and while we currently rely upon vsgXchange::assimp to load glTF longer term we may wish to support glTF directly, and potentially this might open the door to loading 3DTiles with a futher extension to it. With further work this might then open the door to having writing support for glTF and 3DTiles.

I recall @wangii mentioning that he's done some work on VSG/glTF integration so might help some helpful insights in this direction. @timoore also now works from Cesium so will know the ins and outs of 3DTiles even more now than when he wrote vsgCs.

[timoore]

@timoore also now works from Cesium so will know the ins and outs of 3DTiles even more now than when he wrote vsgCs.

Well, yes 😄 There are tools, like https://github.com/CesiumGS/3d-tiles-tools, that can be used to create a simple 3D Tiles tileset from a glTF .glb file. This won't have move more than a geolocation and maybe a bounding region. If you want to split a complex model into hierarchical LODs, you need a tiler. Cesium has its Cesium ion service, which has a free tier. There are other tilers around;
one I hear about is https://github.com/Gaia3D/mago-3d-tiler, though I don't necessarily agree with their tag line.

[xarray]

Hi, I've just updated vsgRecipes (https://github.com/xarray/vsgRecipes), which currently has only one gltf example. It supports loading .b3dm and .i3dm files which are core parts of 3dtiles. It would also support skeleton animations, skinning and blendshapes soon, maybe this weekend.

My own goal is to have a full-functionality gltf plugin for VSG and OSG (which is done in https://github.com/xarray/osgverse) in future. And the gltf plugin may be committed to vsgXchange later if possible.