Yet Another Breeding-Related Question

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chintznibbles:
First, the question: Are babies determined at conception, or at birth?  (ie. gender, combination of parental "genes", etc)

Background info: I generally play with all kinds of naughty shit installed, so frankly the idea of sims breeding makes me a little bit uncomfortable.  However, for some unfathomable reason I have decided to have a couple of recent households actually spawn on occasion, largely due to my accidentally making one a family sim and the other where a married couple of non-fambly sims spontaneously decided they wanted to fulfill their biological imperative.  So far it seems I have very little patience for child-sims, which is perhaps telling insofar as I have very little patience for real children.  Pescado's Baby Controller is very useful, but apart from that... meh.  I've mostly been force-fulfilling their wants and cheating their motive bars up, in the absence of the (surprisingly unlikely) situation that their parents actually desire to do anything with them.

Deep, nerdy background: I was hoping the genders were random because one of the households is, in fact, a shard of an Antaran Hive, a race of humanoid aliens that have a gender orientation similar to Earthly honeybees (they (coincidentally, like most sims) are largely females, although the vast majority of the reproduction is done by active female Queens and whatever drones the colony is privileged to have.)  When the Queen suddenly started spawning twin drones, I started getting a little bit concerned.  Add to that a healthy dose of "fugly baby disorder" and I decided to quit out of the lot without saving.  So if I go back and play again, will both babies be the same once they are born, or will the genetic dice get another toss?  For that matter, is there any way to force the gender of a spawn?  My general method of introducing new genetic material to a population is via the CAS screen... :p

(and yes, I do spend too much time thinking about this crap, because otherwise the game gets a tad bit dull.)

J. M. Pescado:
All characteristics of the spawn are decided at birth, but the quantity of spawn are predetermined based on data imprinted onto the token in advance. Be aware of the "Firstborn Effect", as the sim-generation sequence is actually deterministic and starts from the same seed value at every boot.

chintznibbles:
Awesome, thanks.  I've already done the "Randomize Sim Generation" deal from the Lot Debugger, so I assume that will avert the whole firstborn thing?  Assuming I understand the purpose of that function, of course. ;)

sloppyhousewife:
Quote from: chintznibbles on 2008 August 07, 10:55:08

Awesome, thanks.  I've already done the "Randomize Sim Generation" deal from the Lot Debugger, so I assume that will avert the whole firstborn thing?  Assuming I understand the purpose of that function, of course. ;)


That's what it does, yes. But if I recall correctly, you have to run it for every game session in which you expect spawn, because the stats are reset to sadorandom on game startup (i.e. you're back to the firstborn effect).

Zazazu:
Quote from: J. M. Pescado on 2008 August 07, 09:14:20

All characteristics of the spawn are decided at birth, but the quantity of spawn are predetermined based on data imprinted onto the token in advance. Be aware of the "Firstborn Effect", as the sim-generation sequence is actually deterministic and starts from the same seed value at every boot.

It should be noted that any spawn-number hacks you have may screw with this. For example, TJ's Trips & Quads rolls during birth, or can be set during birth if you use the non-random version.

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