Cesium: Clamp 3D Tileset Relative to Ground at Runtime

Created on 11 Oct 2018  路  5Comments  路  Source: CesiumGS/cesium

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

category - 3d tiles type - enhancement

Most helpful comment

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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

All 5 comments

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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

Is this in the pipeline?

@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.

@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.

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

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