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Showing posts from November, 2017

Blog has moved

From now on I will be posting on https://snorristurluson.github.io/ Most of my postings have code snippets in them and I've been using markdown, checking into a GitHub repo, then copying and pasting the contents. Using a static site generated with Jekyll just seems easier. Thanks, Blogger - I have moved on...

Waiting for an answer

I want to describe my first iteration of  exsim , the core server for the large scale simulation I described in my last  blog post . A  Listener  module opens a socket for listening to incoming connections. Once a connection is made, a process is spawned for handling the login and the listener continues listening for new connections. Once logged in, a  Player  is created, and a  Solarsystem  is started (if it hasn't already). The solar system also starts a  PhysicsProxy , and the player starts a  Ship . These are all GenServer processes. The source for this is up on GitHub:  https://github.com/snorristurluson/exsim Player The player takes ownership of the TCP connection and handles communication with the game client (or bot). Incoming messages are parsed in  handle_info/2  and handled by the player or routed to the ship, as appropriate. The player creates the ship in its  init/1  function. The state for the player holds the ship and the name of the player. Ship

Large scale ambitions

Learning new things is important for every developer. I've mentioned  this before, and in the spirit of doing just that, I've started a somewhat ambitious project. I want to do a large-scale simulation, using  Elixir  and Go , coupled with a physics simulation in C++. I've never done anything in Elixir before, and only played a little bit with Go, but I figure,  how hard can it be ? Exsim I've dubbed this project exsim - it's a simulation done in Elixir. Someday I'll think about a more catchy name - for now I'm just focusing on the technical bits. Here's an overview of the system as I see it today: exsim  sits at the heart of it - this is the main server, implemented in Elixir. exsim-physics  is the physics simulation. It is implemented in C++, using the Bullet physics library. exsim-physics-viewer  is a simple viewer for the state of the physics simulation, written in Go. exsim-bot  is a bot for testing exsim, written in Go.