Quake-III-Arena VS Craft

Quake III Arena

If you know C, you can check this out by comparing the different player movement code of Quake 3 and Quake 1.

You mean this code?

https://archive.softwareheritage.org/browse/content/sha1_git...

Do you see that notice at the top of the file? It says:

==

This file is part of Quake III Arena source code.

Quake III Arena source code is free software; you can redistribute it

The error messages comes from this file in the source code. It looks like the client is trying to parse entities from the server but the readcount is greater than the cursize in the messages. I am not an expert but I believe there could be a mismatch between the versions of your client and the servers you are trying to connect to.

After learning C, one of the first projects I came into contact with, was the ID Tech 3 game engine [1]

On the one hand, it taught me how professional C programmers structure their code (extra functions to remove platform differences, specific code which is being shared between server and client to allow smooth predictions) and how incredible fast computers can be (thousands of operations within milliseconds), but it also showed me, how the same code can result in different executions due to compiler differences (tests pass, production crashes) and how important good debugging tools are (e.g. backtraces).

To this day I am very grateful for the experience and that ID decided to release the code as open source.

[1] https://github.com/id-Software/Quake-III-Arena

Here’s the original code: https://github.com/fogleman/Craft/blob/master/src/world.c I don’t really have an “after” because I edited it a lot and didn’t backup the original, but try it yourself and you should get similar results. I also told it to make the variable names better.

When this subject comes up, I always like to link to one of the many Minecraft clones written in C. https://github.com/fogleman/Craft

Not java but https://github.com/fogleman/Craft will give you an idea of what has to be done.