search

CesiumGS / cesium

An open-source JavaScript library for world-class 3D globes and maps :earth_americas:
https://cesium.com/cesiumjs/
Apache License 2.0
12.86k stars 3.47k forks source link

Clamp 3D Tileset Relative to Ground at Runtime #7139

Open ggetz opened 6 years ago

ggetz commented 6 years ago

Add option to clamp 3D Tileset features relative to ground at runtime, similar to https://cesiumjs.org/Cesium/Build/Apps/Sandcastle/index.html?src=Geometry%20Height%20Reference.html

Requests from Community

For Unity but same ask to clamp individual features of a tileset to the ground - https://community.cesium.com/t/my-assets-add-data-upload-multiple-objects-and-set-their-geoposition/31959/3?u=mdc9001

OmarShehata commented 5 years ago

I was trying to find this earlier, so I'm posting here to keep it as a reference, here's a Sandcastle Gabby had on the forum to clamp individual tiles to the ground:

https://cesiumjs.org/Cesium/Build/Apps/Sandcastle/index.html#c=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

gibranparvez commented 5 years ago

Is this in the pipeline?

OmarShehata commented 5 years ago

@gibranparvez it's not currently being developed. I think the problem with this is that it's a lot slower to clamp at runtime, and this can be usually done while generating the tileset.

gibranparvez commented 5 years ago

@OmarShehata Suggestions for the most efficient way of sampling the terrain (not just the ellipsoid) height and translating my 3dtileset's heights to them? Running into roadblocks trying to do this, and once I do I'd definitely report back so anyone else could use the same code.

OmarShehata commented 5 years ago

@gibranparvez I posted some thoughts in your forum thread here https://groups.google.com/d/msg/cesium-dev/l4aJ_gp3n4I/I3-Cot3cAgAJ