Games written in haskell

Allure 5 8. Project mention: Looking for txt logs of runs to train ML project, any game could do. SonarQube www. Project mention: how did i miss it in the replay? Project mention: I created Pyminion, a python package for simulating games of Dominion! HGE2D 0 88 0. FunGEn 1 68 3.

Project mention: Asteroid clone A paper on functional programming in video games reddit. Monadius 0 48 0. ActionKid 0 42 0. SFML 0 41 0. NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking Dec The latest post mention was on Index What are some of the best open-source Game projects in Haskell?

As of , the following forums seem the most active, so please ask there for up-to-date information: haskell-game IRC channel mirrored as haskell-game room in Matrix the Discord Haskell GameDev server More links below, but some may be defunct or dormant. Categories : Games Community. Navigation menu Personal tools Log in. Namespaces Page Discussion. Views Read View source View history.

Navigation Haskell Wiki community Recent changes Random page. I have an answer below using netwire Though too simple to be called a "game", it should be very composible and very extendable. I am just learning Haskell, and trying to make a small game out of it.

However, I would like to see what structure a small canonical text game can be. I also try to keep the code as pure as possible. I am now struggling to understand how to implement:.

I don't have any postable code because I cannot get the very basic stuff. Or, probably Haskell is not intended to do things like this? Or probably I should put the main in C? OK, I found Haskell recursion and memory usage and gained some understanding about the "stack" So is there anything wrong about my testing method? After 3 months of digging through numerous websites and trying out some small projects, I finally get to implement a minimalistic game or is it?

This example exists merely to demonstrate one possible structure of a game written in Haskell, and should easily be extended to handle more complex logic and gameplay. This mini game has only one rectangle, which the player can move left and right by pressing Left and Right key, and that is the whole "game". The game is implemented using netwire If I understand correctly, the architecture is fully functional reactive. Almost everything is implemented by Arrow composition, with only one function exposed in IO.

Therefore, I expect the reader to have basic understanding of the Arrow syntax of Haskell, since it is used extensively. The implementation order of this game is chosen to make debugging easy, and the implementation itself is chosen to demonstrate different usage of netwire as much as possible.

If everything works, there should be a white rectangle appearing on the bottom of the window appearing. Note that clicking the x will not close the window. Since we do not want to implement all the way to the last step and find that nothing can be drawn on screen, we are doing the output part first. A basic structure of a interactive program using Kleisli Wires is shown in this example: Console interactivity in Netwire?

Then, since I did not get trace to work under Arrow processes, a debug wire is made to print objects to console:. Now it is time to write some functions to be lifted into wires. For output, we need a function that returns a SDL. Surface with proper rectangle drawn given the X coordinate of the pad:. Be careful, this function does destructive updates. The surface passed in will be blitted onto the window surface later. Note that if you like, you can also make another wire to handle the main window surface too and it is easy and better than my current implementation , but I was too late and lazy to add that.

Check out the interactive example I mentioned above to see how simple run can get it can get even simpler if inhibition is used instead of quitWire in that example. As comment suggested, the Monoid instance only applies for this particular game since it has only two opposite operations: left and right.

Obviously enough, this function polls events from SDL as a list, and inhibits when the Quit event is received. We will have a list of keys that are currently pressed, and it should update when a keyboard event occurs. In short, when a key is down, insert that key into the list, and vice versa:.

Note that mkKleisli makes wire that does not inhibit, but we want inhibition in this wire since the program should quit when it is supposed to. Then, we need to filter the events. First, make a helper function that makes a continuous time filter wire:. To actively fire discrete events netwire events that contain game events, we need to hack netwire a bit I think it is still quite incomplete since it does not provide a wire that always fires events:.

Comparing to the implementation of now , the only difference is never and always. When the program is run, the console gives a lot of output showing the current game events being fired. Try pressing left and right, and their combinations and see whether the behavior is expected. Of course, the rectangle will not move. I hard coded everything, but those are not important for this minimalistic example.