Creating network connections with Godot is simple — as long as you have the other party’s IP address, and there’s no NAT gateway involved. Unfortunately, that’s exactly the problem in most cases. You don’t know the other party’s IP, and these days, just about everyone is behind a combination wifi router/gateway/firewall with NAT.
Conceptually, NAT hole-punching is pretty simple, and this video explains how it’s done with just netcat.
In a nutshell:
listen on a particular port (e.g. 50001)
nc -u -l 50001
echo ‘hello’ | nc -u ipaddr 50001
echo ‘hole punch’ | nc -u -p 50001 ipaddr 50002
third party exchanges ip addresses
Putting it all together, player A (hosting a game) would require the game to connect to the directory server.
The directory server would list the game as something a player can now connect to.
player B (client who wants to join) will tell the directory service that it wants to connect, and will send its info
The directory server forwards the information to player A (host), player A will then send a packet to player B, and respond to the directory server
The directory server will then tell player B to go ahead and connect to player A.
Player B should be able to punch through to player A
With Godot, the connections from client to host would use ENetMultiplayerPeer.create_client(), which can specify the local port.
Just a couple of days ago, Godot 4.0 alpha 17 was announced. Today, Godot Engine 4.0 beta 1 was released. Be sure to check out the announcement. There are lots of improvements across the board; rendering, lighting, physics and navigation, animation, and scripting.
Version 1.0 of the Inventory System is now available. It includes a few new additions since the closed beta: Lots of fixes found their way into this release as well:
For some reason, my Godot game would no longer launch on the Steam Deck. I could hear it running as if it were running in the background, but the screen kept showing the Steam Deck’s UI. Since it’s all Linux I figured it should be possible to just drop to the command line and launch …
Hugo-Dz created Super Godot Galaxy: https://github.com/Hugo-Dz/super-godot-galaxy, which he announced in this Reddit post. It uses the 3D Starter Kit from Kenney and shows how to achieve the effect of applying gravity toward the center of a small spherical planet.
Creating a UDP peer-to-peer connection
Creating network connections with Godot is simple — as long as you have the other party’s IP address, and there’s no NAT gateway involved. Unfortunately, that’s exactly the problem in most cases. You don’t know the other party’s IP, and these days, just about everyone is behind a combination wifi router/gateway/firewall with NAT.
Conceptually, NAT hole-punching is pretty simple, and this video explains how it’s done with just netcat.
In a nutshell:
Putting it all together, player A (hosting a game) would require the game to connect to the directory server.
With Godot, the connections from client to host would use ENetMultiplayerPeer.create_client(), which can specify the local port.
Here’s an older example of a signaling server: https://github.com/Faless/gd-webrtc-signalling/tree/master
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Godot Engine 4 reaches beta
Just a couple of days ago, Godot 4.0 alpha 17 was announced. Today, Godot Engine 4.0 beta 1 was released. Be sure to check out the announcement. There are lots of improvements across the board; rendering, lighting, physics and navigation, animation, and scripting.
Inventory System v1.0 available
Version 1.0 of the Inventory System is now available. It includes a few new additions since the closed beta: Lots of fixes found their way into this release as well:
Launching Godot Games on Steam Deck from the command line via Remote Shell
For some reason, my Godot game would no longer launch on the Steam Deck. I could hear it running as if it were running in the background, but the screen kept showing the Steam Deck’s UI. Since it’s all Linux I figured it should be possible to just drop to the command line and launch …
Super Godot Galaxy Concept
Hugo-Dz created Super Godot Galaxy: https://github.com/Hugo-Dz/super-godot-galaxy, which he announced in this Reddit post. It uses the 3D Starter Kit from Kenney and shows how to achieve the effect of applying gravity toward the center of a small spherical planet.