Allow the camera's zoom to be locked by a keybind
or a Gameplay setting. The zoom lock
behavior can be changed between Toggle
and Auto, where Auto only locks the camera
zoom while specific movement/combat inputs
are being pressed. (closes!1528)
A temporary fading notification is shown at the
top of the screen, informing the player of
the setting change (when the keybind is
used) or that the zoom is locked (when
the player might have forgotten the zoom
is locked, and is trying to zoom).
i18n strings are added for English and German,
but no other languages.
To implement the simplistic fading text, the
behavior was extracted into an impl
called `ChangeNotification`, where
reasons are quantified by `NotificationReason`.
entities are synced from and displayed in.
NOTE: Syncing entities work at the granularity regions which are
multi-chunk squares but the display of entities in voxygen is limited in
a circle with the radiues of the supplied distance.
Additional details and changes:
* Added `ViewDistances` struct in `common` that contains separate
terrain and entity view distances (the entity view distance will be
clamped by the terrain view distance in uses of this).
* View distance requests from the client to the server now use this
type.
* When requesting the character or spectate state the client now passes
its desired view distances. This is exposed as a new parameter on
`Client::request_character`/`Client::request_spectate`. And the client
no longer needs to send a view distance request after entering these
states. This also allows us to avoid needing to initialize `Presence`
with a default view distance value on the server.
* Removed `DerefFlaggedStorage` from `Presence` and `RegionSubscription` since the
change tracking isn't used for these components.
* Add sliders in voxygen graphics and network tabs for this new setting.
Show the clamped value as well as the selected value next to the
slider.
* Rename existing "Entities View Distance" slider (which AFAIK controls
the distance at which different LOD levels apply to figures) to
"Entities Detail Distance" so we can use the former name for this new
slider.
* When client gets its view distance set by the server it stores that as
the max view distance allowed by the server.
* This is used to avoid skip sending requests if `set_view_distance` is
called with larger values.
* This is then also displayed in the UI via greying out the slider when
it goes past the limit and drawing another slide at the limit.
* The server clamping the client's view distance no longer leads to
edits in voxygen's view distance settings (the view distance setting
is instead preserved).
