I need some help, I wanted to get a seed from my map that was made before the Halloween update, and I figured out that all my great chucks were deleted(most of them) and I cant get them back... or can I?
HELP!! I love this map and I want to use it on my server.
In order to convert the world to the new save file format, Minecraft had to essentially load each chunk in your save, read it, and write it back out.
Unfortunately, one of the major flaws of the old format was that with so many file operations going on, it was possible for a single chunk file to get corrupted now and then. If that happened, when Minecraft did the conversion, it simply skipped over the file and moved to the next.
If you've been 'diligent' and kept copies of your old saves, you can try to find out the actual chunk file names using F3 while standing in the affected area, and then work backward looking through your saves for a backup of the file that isn't corrupted, and then reconvert using that.
If you haven't kept backups, unfortunately those chunks will be lost. The conversion process, AFAIK, did not make backups of the old saves.
Is there a way to see what the seed of a world is from before seeds were implemented? I have a really super amazing one with a giant floating island right above my spawn.
The map was made probably less than a week before seeds were introduced.
If the map wasn't created AFTER 1.3 was introduced, then that seed isn't going to help you because the generator has changed many many times since then. However there is a way to pull your seed, it's stored in the level.dat for your world. Use a NBT Editor like NTB Edit and it should be fairly well labeled.
*Edit - When I read your post originally I thought you meant it was created shortly after Notch changed the format from the limited map style of creative to the currently 'infinite maps with seeds' style of today. Instead of "I created this world a few days before beta 1.3.
The seed still will probably not do you any good, as I do think the generator has changed as of 1.3, but it's not as hopeless as I was painting it.
You should add to the original post that the seed is stored in a long variable and a long variable is 2^64 in side meaning there are 2^64 different worlds you can generate through seeding. I am curious if you can also find out how it converts things over this number into a number in the range of a long variable.
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MOD EDIT: Saying this is unnecessary and rude. If people are willing to discuss it, let them discuss it. There's a whole wide world of other topics you could explore and contribute to that you might even be interested in! How exciting!
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Will the same seed always result in the same World?
Short answer yes, long answer sometimes. Different operating systems may give different results for the same seed. This is untested though, so for now, just assume that it should give the same world, but is not guaranteed.
This I can confirm.
On Win7, seed Amanda: you'll get Snow and ice, on cords 0:0
On WinXP, same cords you'll get Woods and mountains.
Have not tried on Ubuntu, cus' it only crashes.
Going to ask again. I know that letters in seeds are converted into numbers when you make the world, but what about math symbols? Do those affect in a different way? Please just respond with a simple "yes" or "no". I think it's a no, but I'm not sure.
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"Look at me still talking when there's science to do. When I look out there it makes me glad I'm not you."
Could you add something in the FAQ about how the seed affects generation outside the original spawn chunks? Like If I keep exploring out and generating new chunks, will they always be the same if I made a new world and explored more? Sorry if that made no sense, I can't think this morning haha.
Good FAQ, there could be a lot more added though. From the very newby stuff like 'how to enter a seed' to other things like 'how to extract a seed from a map'. After all, this is a Frequently Asked Questions thread.