local off,res,range = Vector3.new(0,10,40),.1,10
local wm = Instance.new("WorldModel",script)

function trunc(n,d)
    return math.round(n*d)/d
end
function createPart(pos,re)
    local p = Instance.new("Part")
    p.Size = Vector3.one/(1/(re or res))
    p.Anchored = true
    p.Position = off+Vector3.new(-pos.X,pos.Y,0)
    return p
end
local parts = {}
function rend()
    for i,v in parts do v.Parent = wm end
    table.clear(parts)
end
function draw(func)
    for x=-range,range,res do
        for y=-range,range,res do
            local pos = Vector2.new(x,y)
            if func(pos) then
                table.insert(parts,createPart(pos))
            end
        end
    end
    rend()
end
function reset()
    wm:ClearAllChildren()
    -- axees
    for y=-range*1.5,range*1.5,.05 do
        local p = createPart(Vector2.new(0,y),.05)
        p.Color = Color3.fromRGB(255,0,0)
        p.Position = p.Position+(Vector3.zAxis/(1/res))
        table.insert(parts,p)
    end
    for x=-range*1.5,range*1.5,.05 do
        local p = createPart(Vector2.new(x,0),.05)
        p.Color = Color3.fromRGB(0,0,255)
        p.Position = p.Position+(Vector3.zAxis/(1/res))
        table.insert(parts,p)
    end
    rend()
    --
end
owner.Chatted:Connect(function(w)
    local s = w:split(" ")
    if s[1]=="/e" or s[1]=="/emote" then table.remove(s,1) end
    if s[1]:sub(1,2)~="f/" then return end
    if s[1]=="f/reset" then
        reset()
    elseif s[1]=="f/graph" then
        local ff,err = loadstring("local x,y=(...).X,(...).Y;return "..table.concat(s,' ',2))
        if ff==nil then return print('err',err) end
        draw(ff)
    elseif s[1]=="f/equal" then
        local ff,err = loadstring("local x,y=(...).X,(...).Y;return y == ("..table.concat(s,' ',2)..")")
        if ff==nil then return print('err',err) end
        draw(ff)
    elseif s[1]:sub(1,6)=="f/set/" then
        if s[1]:sub(7)=="res" then
            local n = tonumber(s[2])
            if n then res=n;print('set res') else print('failed tonumber') end
        elseif s[1]:sub(7)=="range" then
            local n = tonumber(s[2])
            if n then range=n;print('set range') else print('failed tonumber') end
        end
    end
end)