Add a terrain finisher that populates chunks with animals

[madmaxoft]

Create a new cTerrainFinisherGen descendant that populates the top of the generated chunks with animals. The animals should be biome-dependant, should spawn only in a (configurable) percentage of chunks and should spawn in pack of multiples.

Use a simple random relative-coord generator for the pack's center inside the chunk, and random offsets for individual animals in the pack, setting each animal's height to the top of the heightmap.

[p-mcgowan]

I'm trying to implement this in src/Generator/FinishGen and I am having trouble getting the world to spawn in mobs. I can post progress so far, but I'm wondering if you have any thoughts to guide me in the right direction. It would be much appreciated

[madmaxoft]

You should make a finisher that adds entities to the cChunkDesc's list of entities, nothing more. If that doesn't make the animals spawn, it's a bug elsewhere and will need to get addressed.

[p-mcgowan]

awesome, that's quite helpful. Thanks for the feedback.