Pan/zoom overlaid element with deck controller

[kwala007]

Hello, I have a few SVGs overlaid on a deck.gl map (pure JS implementation). I'd like to be able to move them around with the map when I zoom/pan using the built in MapController. I assume there is some sort of transformation applied to the map view every time a user manipulates the view. Is there any way to extract that transformation from the controller's event handler so it can be applied to the overlaid SVGs as well? I've managed to extract the relevant events themselves using a custom controller, but I need to know how the controller handles the events to ensure the map and SVGs move together. I can't put the SVGs into an IconLayer, since the SVGs are interactively added, moved, and deleted by the user. I am a JS beginner, so apologies if there is a simple solution I missed.

[TextTL]

There's one example here: #3945