Changes When Aligning 3D Models in Cesium ion

Cesium ion
1

Hi,

If you upload a 3D model with an arbitrary coordinate system to Cesium ion, of course, it cannot be overlaid on terrain. When you perform alignment in Cesium ion, what changes are applied to the registered 3D Tiles?

  • Only the transform in tileset.json
  • Or also the coordinates inside the tile files (.glb)

My interest is whether, when a 3D model built in a local coordinate system is aligned to the Earth’s spherical surface in Cesium ion, the process involves only a linear transformation based on a reference in the data area, or whether each coordinate is modified and projected onto the curved surface.

I look forward to your response.

2

If you are talking about the “Tileset Location Editor”: This does not (and can not sensibly) modify the coordinates in the glTF files. It only modifies the tileset JSOn. (What exactly it modifies there, and how, may not be guaranteed, but I’m sure that it does not modify the GLBs)

1 Like
3

Hi Chiiii,

When using the Adjust tileset location button it only will modify the tileset transform. It does not dig into the GLB or other content files to modify the points defining the geometry.