Thank you for the contribution. It has been approved.

Very good explanations and graphics. That's a good mix of description and code.

Perhaps you could tell us about the tools you use to keep all that great new code in check. For example, it looks like you are using codacy bot to check on some common issues:

 +    /**
 +     * Mirror of the building.
 +     */
 +    private boolean isMirrored;

> codacy-bot 5 hours ago
> Codacy Issue found: Field isMirrored has the same name as a method

Another great post overall.

You can contact us on Discord.
[utopian-moderator]