Using a "local" box vs. a "global" region bounding volume

3D Tiles
3

A recent thread where the issue was similar: Implicit tiling file format help - #8 by Marco13

Relevant points may be:

  • The tile.transform is applied to the geometry (i.e. to the glTF data)
  • The tile.transform is also applied to a bounding box or sphere
  • The tile.transform is not applied to a bounding region

(The latter simply because a bounding region cannot sensibly be transformed with a 4x4 matrix…)

Maybe this can be made clearer or pointed out more explicitly in the specification…

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