We currently have one world generator. It's the "Composable" generator. In this generator you can define specific modules like the biome generator, composition generator, shape generator, structures and more.
BiomeGen is the module that specifies how the biomes are generated. Grown is the most 1.7-like biome generator we have.
CompGen is the module that specifies what blocks the terrain should be made out of. For example grass with 3 blocks of dirt and after that only stone, or sand in deserts etc.
xoft can probably describe this in allot more detail since he created it all, but this should probably suffice. Of course if you have more questions please ask them
BiomeGen is the module that specifies how the biomes are generated. Grown is the most 1.7-like biome generator we have.
CompGen is the module that specifies what blocks the terrain should be made out of. For example grass with 3 blocks of dirt and after that only stone, or sand in deserts etc.
xoft can probably describe this in allot more detail since he created it all, but this should probably suffice. Of course if you have more questions please ask them