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Member Posts: 3514 From: Immigrant in the land of Deutsch Joined: Member Rating: 9.2 |
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Author | Topic: BoxCar2D - neat little genetic algorithm demonstration | |||||||||||||||||||||||
Dr Adequate Member (Idle past 315 days) Posts: 16113 Joined: |
Well, when I left it it was up to 1024, and its shape was similar to what it was at 900 and at 1002 --- a very low-slung motorcycle with the hind wheel half the size of the front wheel and a mudguard/tail over the hind wheel, and the suspension of the front wheel pointing upwards, so that it did not in fact function as suspension.
Now, about thirty generations later (and 1055) it's barely recognisable. The tail has gone, the rear wheel is three-quarters the size of the front wheel, the suspension of the front wheel points forwards, and nothing sticks out of the top, so that it can and does perform some of the journey upside down. And I missed all the intermediate forms, dagnammit.
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DBlevins Member (Idle past 3806 days) Posts: 652 From: Puyallup, WA. Joined: |
It appears that I have some 'cars' who now use what was once a useless? third wheel, now use it (as it grew a bit larger) to help them get over the humps. An example of exaptation?
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slevesque Member (Idle past 4671 days) Posts: 1456 Joined: |
I'm now at 1006,9, with great hope of going further since the hump that is stoping won't last long.
Main frame is just two sticks at an angle of about 150 degrees, with a single wheel at the back and a double wheel (single best mutation right here!) at the front.
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Dr Adequate Member (Idle past 315 days) Posts: 16113 Joined: |
It's interesting that you should have a three-wheeler --- Mr Jack was implying that they'd converge to two wheels.
This is a case of contingency in evolution which would doubtless delight Stephen Jay Gould.
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slevesque Member (Idle past 4671 days) Posts: 1456 Joined: |
I'm guessing two wheels can only get you so far, the double traction up front is definitely needed I think past 800
oh and I also put my max wheel to 8 Edited by slevesque, : No reason given.
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Dr Adequate Member (Idle past 315 days) Posts: 16113 Joined: |
I'm guessing two wheels can only get you so far, the double traction up front is definitely needed I think past 800 Far from it. My three-wheeled species started dying out around that mark, and my two-wheeled forms are now up to 1055, which is slightly better than you've managed. --- Note to all: you can take a screenshot of your cars by pressing the PrtScr button towards the top right of your keyboard, trim it in MS Paint, upload it to ImageShack or a similar website, and then link it here as an image.
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DBlevins Member (Idle past 3806 days) Posts: 652 From: Puyallup, WA. Joined: |
So far, at the 20th generation (with 5 wheel max) my best is the three wheel family at 842. The two front wheels are vertical to each other. The two wheel families suck
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slevesque Member (Idle past 4671 days) Posts: 1456 Joined: |
Yeah well my two front wheels significantly overlap, so it just makes a two-wheeler with much more power in front.
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Dr Adequate Member (Idle past 315 days) Posts: 16113 Joined: |
It's not so boring as it looks --- the indentation on the underside serves as a sort of grappling hook. This picture shows its furthest point of progress. I don't see how it can be improved, but am prepared to be surprised.
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Dr Jack Member Posts: 3514 From: Immigrant in the land of Deutsch Joined: Member Rating: 9.2 |
By now, I think you guys have more experience of what this will evolve than I do
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slevesque Member (Idle past 4671 days) Posts: 1456 Joined: |
I don't know how much speed it has when getting to that hill, but you should hope to see it evolve a second front wheel (maybe higher max wheel ?)
I'm starting a new one right now. Edited by slevesque, : No reason given.
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New Cat's Eye Inactive Member |
What am I actually supposed to DO?
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DBlevins Member (Idle past 3806 days) Posts: 652 From: Puyallup, WA. Joined: |
Set the parameters you want in/for your population (such as number of wheels, wheel frequency, mutation rate and environment) and then sit back and watch. The FAQ explains the process of crossover, mutation, and how breeds are chosen to 'mate', among other things.
Currently I am on the 40th generation, of course I let the computer run over night.
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New Cat's Eye Inactive Member |
...and then sit back and watch. Oh okay, I was all: am I just supposed to sit here and watch!? Thanks man.
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AZPaul3 Member Posts: 8564 From: Phoenix Joined: Member Rating: 5.1 |
Do you do pop. size of 20 or smaller ?
I use the default: 20. Sometimes I use 3 or 4 wheel, 50 - 60 wheel frequency, 5 -7 mutation then let 'em run for at least 15 generations. Never been over 1000. I did make a car. Nice three-wheeler with two wheels overlapping for extra drive, long wheel base, no spikes so it can tumble and not get spiked and most of the triangle area over the single wheel to help balance the mass of the two-wheel end. Worked real well and I was hoping for an evolved champion, but nooooo! De-evolved junque.
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