I am building a simple game with Node. I use socket.io for communication between devices.
I want the node server to handle all the game logic; collision detection, scores ect.
The Node (socket.io) server should then send some display infomation to clients; player position, score, map size ect.
The client should also be able to send navigation commands to the server, like up and down. It might also need collision detection to avoid that you try to step out of the map ect, there is no need for us to send the navigation data then.
My question is, are there any libarys that handle this kind of logic? I know there are some game libs out there for JS, but as far I can see they are for handling the logic and rendering, and are not made to be used on a Node server.
I have used Crafty for both rendering and logic before. I am thinking that I'll draw the game with Raphaël.
You could maybe try the SDK from GameClosure? My understanding is that it has a lot of that sort of stuff available, though I've not used it myself.
That said, the idea of just doing everything on the server is a little bit odd. The performance and responsiveness of your game is going to become very dependent on the player's connection to the server. There are other schemes that have been implemented for many years in multiplayer game servers, which is a kind of client-side calculation with the server ensuring that the clients are doing that calculation correctly. Is there a reason it all needs to be done server-side?
I found BonsaiJS.
It's a nice Ghapic Libary with an architecturally separated runner and renderer.