2D array? 3D array? What?

[Afr0]

Alright, I needed a way to fill out my map array, but I couldn't understand the way the Löve filesystem worked, so I sort of hacked together my own file loading, which seems to work;

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--Must be called before TileMap:Draw()!
function TileMap:LoadMap(Path)
	local File = assert(io.open(Path, "r"))
	local Lines = {}
	
	for Line in File:lines() do
		Lines[Line] = File:read()
	end
	
	for i = 1,table.getn(Lines) do
		for j = 1,strlen(Lines[i]) do
		end
	end
end]

Now what I need to know is; How do I fill in the Map array from the Tilemap tutorial?

That array looks like this:

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map={
   { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, 
   { 0, 1, 0, 0, 2, 2, 2, 0, 3, 0, 3, 0, 1, 1, 1, 0, 0, 0, 0, 0},
   { 0, 1, 0, 0, 2, 0, 2, 0, 3, 0, 3, 0, 1, 0, 0, 0, 0, 0, 0, 0},
   { 0, 1, 1, 0, 2, 2, 2, 0, 0, 3, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0},
   { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0},
   { 0, 1, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0},
   { 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
   { 0, 1, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
   { 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
   { 0, 1, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
   { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
   { 0, 2, 2, 2, 0, 3, 3, 3, 0, 1, 1, 1, 0, 2, 0, 0, 0, 0, 0, 0},
   { 0, 2, 0, 0, 0, 3, 0, 3, 0, 1, 0, 1, 0, 2, 0, 0, 0, 0, 0, 0},
   { 0, 2, 0, 0, 0, 3, 0, 3, 0, 1, 0, 1, 0, 2, 0, 0, 0, 0, 0, 0},
   { 0, 2, 2, 2, 0, 3, 3, 3, 0, 1, 1, 1, 0, 2, 2, 2, 0, 0, 0, 0},
   { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
   { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
   { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
   { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
   { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
}

I've never seen an array declared this way before. How many dimentions does it have, and how do I fill it in?

My current map file looks like:

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11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111

[bartbes]

but I couldn't understand the way the Löve filesystem worked, so I sort of hacked together my own file loading

WTF
Anyway, let's take care of that first:

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--Must be called before TileMap:Draw()!
function TileMap:LoadMap(Path)
	local File = love.filesystem.newFile(Path)
        File:open("r")

The rest should be the same.

Then

How many dimentions does it have

Just.. count.. you know, the structure is like this:
{ { } }, so 2 dimensions, wasn't that hard after all..

and how do I fill it in?

Fill it in?

[Afr0]

Yeah, how do I put the values into the array once I extract them from a line in the file with strsub()?

edit: My current Map array looks like:

Code: Select all

TileMap.Map = {}

Thinking about it, I'm guessing I'd have to pluck out two values at once, and then put them each into the X and Y dimension of the array?
I'm not sure how the code would look though :\

[bartbes]

Code: Select all

        for y, t in ipairs(Lines) do --table.getn is deprecated, at least use the replacement (#)
                TileMap.Map[y] = {}
                for x, v in ipairs(t) do
                        TileMap.Map[y][x] = v
                end
        end

Probably

[kikito]

I guess that what you are trying to do is this:

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TileMap.Map = {
  {0,0,0,1,1,0,1,0},
  {0,0,1,0,0,1,1,0},
  {0,1,0,0,0,0,1,0},
  {1,1,1,1,1,1,1,1},
  {0,1,0,0,0,0,1,0},
  {0,1,0,0,0,0,1,0},
  {0,1,0,1,1,0,1,0},
  {0,1,1,1,1,1,1,0},
}

This will give you a 2D (8x8) level with tiles resembling a house with a chimney.

You can make the level bigger than 8x8, and also use different numbers to code different tiles.

[Afr0]

Thanks!

How come you're not using strsub() at all here?
ipairs() is kind of confusing to me, but the first loop seems to be iterating through all the lines, correct?
And then the second call, ipairs(t), iterates through every letter in the current line?

kikito: Yes I'm trying to do that, but I'm trying to load the values for the array from an external file!

[kikito]

kikito: Yes I'm trying to do that, but I'm trying to load the values for the array from an external file!

Have you considered using a lua file, then?

I mean, this could be your directory structure:

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[root]
  |
  +-- main.lua
  |
  `-- [levels]
      |
      +-- level1.lua
      |
      `-- level2.lua

In that case, if level1 had the code I just put on my previous post, you could do just this on main.lua:

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  dofile('levels.level1')

And then you would have the level loaded on the variable TileMap.Map.

Then if you want to load level two, you can do:

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  dofile('levels.level2')

Now the TileMap.Map variable will have level two.

Note: I use dofile instead of require just in case you want to load the same level more than once.

[bartbes]

Yeah and it doesn't work within love, use love.filesystem.load("file")() instead.

[Afr0]

Thanks guys!