I'm trying to add custom structures (similar to villages) to map generation. I've so far worked out that I need to create a generator that implements the IWorldGenerator class and I can generate blocks within a single chunk. Beyond that I'm not sure where to go; most tutorials I've found have been for ore generation. If anyone can point out any tutorials or open-source mods that accomplish something similar I'd greatly appreciate it!

You can make a class that implements IWorldGenerator, but you might find it easier to subscribe to the DecorateBiomeEvent.Decorate.

 

Either of the two will do what you want.

 

One of my old classes with the event: https://github.com/Matryoshika/Saligia/blob/master/src/main/java/Matryoshika/mods/saligia/worldgen/biomeDecorationAltar.java

 

1.10 example of IWorldGenerator (About the same for 1.7.10)

https://github.com/Matryoshika/Underworld/blob/master/src/main/java/se/Matryoshika/Underworld/WorldGen/Dirty/DirtyTreeGen.java

 

Both of these are called from the respective main classes.

 

Remember: Make sure that what you want to spawn, spawns where it should.

Try to make the requirements simple though. Continuously getting and setting blocks will drain most computers, until they seem to load worlds like ten year old toasters. If you have something big to place, lookup chunkproviders and see how they deal with raw bytes instead.

 

Oh, and do think about upgrading to 1.10. I know that everyone is saying that on this forum, but, is it really worth it to code for something obsolete? If you're coding just for yourself, or to learn etc, that's all fine, but if you want people to play with your mod, you kinda do have to pick up the pace, so to speak, lest you finish your mod, but find none playing it.