Cursor lock when dragging camera

[robertlong]

When you currently drag to look we do not lock the cursor. This causes your cursor to move outside the window and the user can become confused as to where their cursor went.

[gfodor]

Did we decide on the exact behavior we want?

[cvan]

(let me know if you would like me to file a separate issue as a feature request.) has the Pointer Lock API been considered? it is popular for FPS games on the Web.

[johnshaughnessy]

#391 Doesn't solve this by locking the cursor on drag, but it at least allows people to toggle cursor lock on right click. If we were to actually lock the cursor on each drag, then the browser would show a notification each time informing the user how to regain control. If we were to keep the app in cursor locked mode, we wouldn't be able to click on the UI.

[johnshaughnessy]

Marking this as closed because we've explored the solutions and chosen one that works OK. Cursor lock when dragging camera is better than the solution we chose, except that a notification about cursor lock would appear every single time you click, and thus we only lock on right click.