Determining monster types during level generation

[Therem Harth]

I'd like to have different types of levels, with different dominant terrain types (I think NPP does this) and different prevailing monster types (as with different dungeons in ToME 2).

e.g. There could be a level that randomly has a lava streamer, and lots of greater demons.

For the terrain stuff (e.g. streamer generation) I think I could probably look at ToME 2; that's all been done before. But I'm not so sure about rigging the monster generation. Are there any variants that have done that on a per-level basis?

[Nick]

Are there any variants that have done that on a per-level basis?

FA has two types of this (partly inherited from O, partly new):

1. Monster restriction on level generation - there are functions during generation that restrict the monster type that can be chosen. It is mostly done for special themed levels, but the same code is used for pits and some vaults;
2. Change of probability based on level type (animals more likely in forests); this is done fairly hackishly at monster placement time, but works OK.