'camera-change' event does not fire while auto-rotating

[jukibom]

Description

Using the camera-change event (modelViewer.addEventListener('camera-change', () => { ... });) does not fire when the model is rotating automatically using auto-rotate attribute.

Note this DOES work with the interaction-prompt attribute.

Live Demo

https://glitch.com/edit/#!/cuddly-palm-cello

(Note you will need to open the browser console)
Console.log "Camera changed!" does not fire when auto-rotation kicks in. interaction-prompt has been disabled here as this already works correctly.

Version

• model-viewer: v2.0.1

Browser Affected

• Chrome, version: 105.0.5195.127
• Edge
• Firefox
• IE
• Safari

OS

• Android
• iOS
• Linux
• MacOS
• Windows

AR

• WebXR
• SceneViewer
• QuickLook

[elalish]

Actually, this is expected behavior. The camera isn't moving during auto-rotate, the model is. It becomes clear if you add a skybox. You can find the current rotation angle through https://modelviewer.dev/docs/#entrydocs-stagingandcameras-properties-turntableRotation

[jukibom]

Ah, interesting! So for doing anything requiring syncing something to positions on the scene on the canvas, is requestAnimationFrame a more suitable approach?

[elalish]

If you want it based on the turntable rotation, then yes. Of course our annotations already account for this, if you want that kind of syncing.