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caterpillar simulation

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jknilinux:
Hey guys,

I'm trying to get a working evolution simulation of peter's caterpillars, but I'm kind of a newb to long-term evosims. Practically every sim I make seems to die out in like 10 kilocycles. So, I was wondering if someone might be able to help me with some suggestions and, if possible, a working evosim with caterpillars. I've looked at all the other threads on the topic, but nothing really seems to work...

Thanks!

Numsgil:
Can you tell why they die?

If they run out of food, consider keeping the veggy population higher (or costs lower).  If there's food but they don't seem to be able to reach it, you need to tweak the genome to add some chance of exploration.  If one goes on a genocidal rampage and kills everyone else, you need to make the field bigger and/or add some shapes (assuming caterpillar is shape aware).

jknilinux:
Well, they seem to kill themselves in a lot of creative ways...

Some caterpillars seem to lose their ability to contract, so they just keep lengthening, and eventually become immobile bars.
Others seem to have reproduction problems, and keep dividing until they become a huge ugly ball of fungus. Then they sit there in a unicellular cluster and do nothing...

Still others seem to break their tie-forming code, and form a pretty cool-looking "spider web", snatching any caterpillars that pass by and getting them tangled in it's mess. These guys not only kill themselves, but kill any caterpillars in tying range as well... which is annoying...

I guess these signs mean that the genome is too fragile? How do I make a genome more durable? I can't just make it have five copies of every gene, can I?

TY!

Numsgil:
You could try 5 copies of every gene.  But mostly I'd suggest lowering the mutation rates by quite a bit.  The default rates were really just picked randomly, and are in now was a "suggestion" as to what a proper rate actually looks like.

jknilinux:
Woohoo, got up to 27 kCycles before they all died!

I had to make a caterpillar with 5 copies of every gene, turn mutation rate down to 1/32x, and they still ultimately died because their movement genes broke...

Perhaps caterpillar is just innately too fragile? Kinda like trying to evolve Vermis P.?

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