Sharing camera position, orientation, and target

[JulieWinchester]

As a museum digital exhibit visitor

I want to obtain a URL that loads the 3D scene at a particular viewpoint

So that I can share an interesting detail of an object with a friend

Relates to https://iiif.io/api/content-state/0.9/

Copy of IIIF/iiif-3d-stories#13

[JulieWinchester]

During the IIIF Annual Conference 2023 the week of June 5 2023, there was discussion of potential requirements and attributes for camera annotation items:

• Needs a "look-at" target, which could either be a 3D point selector or a painting annotation URI (for referencing a camera to a 3D model, label annotation, etc. as the look-at target), which determines the orientation/directionality of the camera view
• Needs a FOV property, defined as a floating point degree value similar to Three.js
• Needs a 3D position property
• Common camera specification properties like near limit, far limit, and aspect ratio are left to implementation and considered out of scope
• Specifying a camera is optional, and not necessary
• It should be possible to specify multiple cameras, to provide functionality for switching between views
• Currently unknown how shifts or transitions between cameras should be documented (CSS?), or if how camera view shifts are accomplished should be considered out of scope