Love2D Lua framework - Converting an unorganised rendering table into a map structure

Question

I'm turning a 2D rendered map which is unorganised into a string table, EG from:

"Render = {{Image,50,60,2}}"

Where Image is the image (I'm using Love2D Lua framework) 50 is the X axis 60 is the Y axis 2 is the Image ID (This is what will be in the actual table.)

But there's like 100 of these, all unorganised and stuff, and I need to oragnise them into a structured map.

Here's the odd bit: When I morph it into an organised string.. It.. Kinda rotates the table on a 90* angle anticlockwise.

Saying I want the result of

{ 
{7,6,5}, 
{6,5,4}, 
} 

I would get:

{ 
{5,4}, 
{6,5}, 
{7,6}, 
} 

Obviously no error since it technically works, just rotates wrongly. Here's the relevant code:

function OrganiseRenderIntoMap() 
    MapString = "" 

    Map2 = {} 
    MaxSoFarX = 0 
    MaxSoFarY = 0 
    for _,v in pairs(Render) do 
        if v[2] > MaxSoFarX then 
            MaxSoFarX = v[2] 
        elseif v[3] > MaxSoFarY then 
            MaxSoFarY = v[3] 
        end 
    end 

    for currx = 0, MaxSoFarX, 32 do 
        Map2[currx] = {} 
        MapString = MapString.."{" 
        for curry = 0, MaxSoFarY, 32 do 
            MapString = MapString..GetRenderPos(currx,curry).."," 
            Map2[currx][curry] = GetRenderPos(currx,curry) 
        end 
        MapString = MapString.."},\n" 
    end 

    return MapString 
end 


function GetRenderPos(locx,locy) 
    for _,v in pairs(Render) do 
        if v[2] == locx and v[3] == locy then 
            return v[4] 
        end 
    end 
end 

Answer 1

Give a look at my LÖVE tile tutorial. Section 1d-Strings speaks about how to handle the "switched x and y" problem.