I'm looking into world gen, but I'm having a difficult time understanding where I should actually start with what I want to do.

 

I want to create an underground stream that can spawn in any biome, yet can span multiple chunks.  I've looked at vanilla and the closest thing I could find is GenLayerRiver, but I'm not sure how it works.  Can anyone point me in the right direction of maybe a mod that does something similar, or a tutorial that could help me out?

I've done some work on the world gen, but I'm stuck again.  I am trying to emulate the way that buildcraft adds oil resevoirs to the game, so I'm subscribing to a populate event, and then running my code when that event gets called.  The populate method in question looks like this:

 

 

@SubscribeEvent
public void populate(PopulateChunkEvent.Pre event) {
        boolean doGen = TerrainGen.populate(event.chunkProvider, event.world, event.rand, event.chunkX, event.chunkZ, event.hasVillageGenerated, EVENT_TYPE);

        if (!doGen) {
            event.setResult(Result.ALLOW);
            return;
        }

        generateLifestream(event.world, event.rand, event.chunkX, event.chunkZ);
    }

 

 

Am I missing something?  Because based off of my logging, it isn't entering this populate method at all.  Do I need to register something, or am I going about this the wrong way?

Have you tried looking at a tutorial? If not, I would recommend bedrockminer's tutorials. http://bedrockminer.jimdo.com/modding-tutorials/basic-modding-1-8/world-generation/

Hmm, I was thinking that there was some kind of issue with using world gen accross chunk boundaries, but with a little more messing around I got it to work .... kinda.

 

 

 

 

Just need to reverse it so that air part of the bottom half is liquid, and put it underground.  Maybe even put a little noise generation to deform the ellipsoid, but that's for another day.