How do I save and load a 2D array?

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So, first off, I know t$$anonymous$$s is a duplicate but none of the answers I found on Google or similar helped me with my problem.

I have a sandbox game where the player places blocks in a 2D space. Every time a block is placed, it saves t$$anonymous$$s to a 2D array called blocks. T$$anonymous$$s is how the array looks: public static int[,] blocks = new int[999,999];

Let's say a player places a block at x500/y500: blocks[500,500] will be set to "1" saying that the block with the ID "1" was placed there.

It all works fine, yet, I still have to save the arrays so that my player won't have to start over every time again! Now, if t$$anonymous$$s would be a 1D array, it would be very easy. T$$anonymous$$s is a 2D array though and I can't simply save it all to PlayerPrefs, nor PlayerPrefsX.

I tried figuring out a way to convert the 2D array to a 1D array, saving that, and then on load converting it back to 1D.

For example by making two arrays, one called blocksX and one called blocksY, but I would have to access the two dimensions individually (like, only the "X" dimension of blocks[x,y] and only the "Y" dimension of blocks[x,y]). How would I do it? And is there a better/easier way?

Many thanks, Sincerely, aleichert

Answer 1

Answer by piotrlipert · Mar 10, 2018 at 05:59 PM

I've done tutorial on that, with compression: https://www.youtube.com/watch?v=AFmk70693Zw

Here's the code: http://www.psilocybegames.com/tutorials/saveloadmultiarray/HowToSaveLoadAnArrayWithCompression.cs

Use it to generate a string, than save it to a file.

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