Created
November 11, 2010 01:03
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-- transforms a pretty-but-difficult string into an ugly-but-easy array for tilemaps | |
local function string2Tiles(str) | |
local tiles = {} | |
local row_length = #(str:match("[^\n]+")) | |
for x = 1,row_length,1 do | |
tiles[x] = {} | |
end | |
local x,y = 1,1 | |
for row in str:gmatch("[^\n]+") do | |
assert(#row == row_length, 'Map is not squared: length of row ' .. tostring(y) .. ' should be ' .. tostring(row_length) .. ', but it is ' .. tostring(#row)) | |
x = 1 | |
for tile in row:gmatch(".") do | |
tiles[x][y] = tile | |
x = x + 1 | |
end | |
y=y+1 | |
end | |
setmetatable(tiles, { __call = function(self, x,y) return self[x][y] end }) | |
return tiles | |
end | |
local function printMap(map) | |
local buffer = {} | |
for x,column in ipairs(map) do | |
table.insert(buffer, "\n { '" .. table.concat(column, "', '") .. "' }") | |
end | |
print( '{' .. table.concat(buffer, ',\n') .. '\n}' ) | |
end | |
local str = [[ | |
1***2 | |
* * | |
* 0 * | |
* * | |
3***4 | |
]] | |
local tiles = string2Tiles(str) | |
print('string:') | |
print(str) | |
print('tiles:') | |
printMap(tiles) | |
print('tiles[5][3]:', tiles[5][3]) | |
print('tiles(5,3):', tiles(5,3)) | |
--[[ Output: | |
string: | |
1***2 | |
* * | |
* 0 * | |
* * | |
3***4 | |
tiles: | |
{ | |
{ ' ', ' ', ' ', ' ', ' ' }, | |
{ ' ', ' ', ' ', ' ', ' ' }, | |
{ '1', '*', '*', '*', '3' }, | |
{ '*', ' ', ' ', ' ', '*' }, | |
{ '*', ' ', '0', ' ', '*' }, | |
{ '*', ' ', ' ', ' ', '*' }, | |
{ '2', '*', '*', '*', '4' }, | |
{ ' ', ' ', ' ', ' ', ' ' }, | |
{ ' ', ' ', ' ', ' ', ' ' } | |
} | |
tiles[5][3]: 0 | |
tiles(5,3): 0 | |
]] |
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