isPosition - is the position valid?

[Colandus]

Use this function to check whether a position is valid or not.

TFS 0.3+ put in data/lib/functions.lua
TFS 0.2 or other put in data/global.lua

do
    -- Function by Colandus!
    local validPositionKeys = {"x", "y", "z", "stackpos"}
    function isPosition(pos)
        local keyAmount = 0
        if (type(pos) == "table") then
            for key, val in pairs(pos) do
                if isInTable(validPositionKeys, key) == FALSE or isNumber(val) == FALSE then
                    return FALSE
                end
                keyAmount = keyAmount + 1
            end
            if (keyAmount ~= 3 and keyAmount ~= 4) then
                return FALSE
            end
            return TRUE
        end
        return FALSE
    end
end

 

[Syntax]

correct me if im wrong but doesnt querytileaddthing, or whatever, dont feel like looking it up, do the same thing? if i get the gist of this function, its the check if the position is a walkable tile?

 

[Colandus]

No it just check if the position table format is valid

But doing as you say you'd use "getTileThingByPos" with a position of stackpos 0 and check uid...

Example:

function positionExists(pos)
    if isPosition(pos) == FALSE then
        error("luaPositionExists: Invalid position format!", 2)
    end

    pos.stackpos = 0
    return getTileThingByPos(pos).uid > 0 and TRUE or FALSE
end

That'd check if a position exist (using this function to check if position is valid)

 

[Syntax]

oh I get it, its a checking function, gotcha.