On a whim I decided to start fresh and redo the original project, Sheep Farm Simulator, to run extremely well and not crash every 30 seconds. Also completely revamping the game mechanics and making it fun for once.
Right now, I've got a couple other projects on my plate, so I've put this one on hold. It's a tech demo of what I learned doing it, basically.
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This project features large-scale terrain generation using a procedural algorithm. It uses simplex noise to scatter the world with overlapping biomes. See terrain.
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I wrote a custom GUI framework to use in the game. I think it looks pretty nice, visually, but what I am most proud of is the ability to anchor components to each other and add subcomponents to panels. All of it can be done in a fairly straightforward way, making it easy and quick to make some pretty complex menu systems. See gui.
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The terrain is divided into sectors of 64x64 tiles, which are further divided into "chunks" of 8x8. The sectors are used to divide the terrain up into easily computable regions, and the chunks are mostly used for active entities in the world to make polling for them easier and more efficient. These terrain sectors are kept in a dynamic list and sorted by their coordinates using a binary insertion algorithm. This means I can retrieve any sector I want (e.g. [0,0]) very rapidly and without much computation at all. Thus, the game can easily handle extremely large worlds. See World.java.
This project is a Maven project, so setup should be fairly simple. You might need to run with Java 1.8. If someone wants to fix it so it works with newer Java versions, feel free to open a PR.