This also improves visuals in the Voxel and Dynamic Split Screen demos,
and fixes splitscreen mode in the Platformer 2D demo.
Most demos (other than physics tests) have also had their physics FPS
increased to 120. This is done consistency with 4.x, but also for the
benefits it still provides when interpolation are enabled
(lower input lag, more stable simulation).
We were removing it from the MultiplayerAPI but not immediately
destroying it (to avoid tricky in-signal de-referencing).
We still need to properly close the connection in this case if we want
the remote peer to be notified immediately.
This allows those demos to run on a greater range of devices.
Particles2D nodes were converted to CPUParticles2D for compatibility
with GLES2.
Physics-Based 2D Platformer demo now uses the same stretch mode
as 2D Platformer for consistency.
The instructions will only show when the player is hosting a server.
This also includes a button to get your public IP address.
This partially addresses #535.
This is required to benefit from crisp display on hiDPI monitors.
This also fixes issues related to fullscreen and input handling
when using an hiDPI display on Windows.
This makes demos render correctly on hiDPI displays,
while also demonstrating how to handle multiple resolutions.
The 3D in 2D demo now uses "3D No-Effects" for the 3D viewport,
which is faster to render. Thanks to this, 4× MSAA is now enabled
for a better result.
The background loading demo now uses mipmaps for better-looking images.
The material testers demo now samples mouse input in a
resolution-independent manner when panning.
Default clear colors were also changed in some projects for visual
consistency with the project's theme.
We used to broadcast player info on connect and have the server relay it
to other clients.
With this approach, each peer (including server) sends its own info once
to other peers as soon as they connects.
When a new player connects, it is notified of all the already connected
peers by the `network_peer_connected` signal.
Any already connected peer is also notified of the newly connected peer
by the same signal.
