tpt ruler

ruler = {}

ruler.active = false
ruler.aHeld = false
ruler.sHeld = false
ruler.rx = 0
ruler.ry = 0

function ruler.draw()
    if ruler.active then
        local mx, my =  tpt.mousex, tpt.mousey
        tpt.drawline(ruler.rx - 2, ruler.ry, ruler.rx + 2, ruler.ry, 255, 255, 255, 127)
        tpt.drawline(ruler.rx, ruler.ry - 2, ruler.rx, ruler.ry + 2, 255, 255, 255, 127)
        if ruler.aHeld then
            tpt.drawline(ruler.rx, ruler.ry, mx, my, 49, 193, 226, 95)
        end
        tpt.drawtext(mx + 11, my + 11, tostring(math.floor(((ruler.rx - mx) ^ 2 + (ruler.ry - my) ^ 2) ^ 0.5 * 100) / 100), 49, 193, 226, 159)
    end
end

function ruler.key(_, key, _,event)
    local e = (event + 2) % 2 == 1
    if key == 304 then
        ruler.sHeld = e
    end
    if key == 308 then
        ruler.aHeld = e and not ruler.sHeld
    end
end

function ruler.mouse(mx, my, _, e)
    if e == 1 or e == 3 then
        if ruler.aHeld then
            if not ruler.active then
                ruler.active = true
            end
            ruler.rx = mx
            ruler.ry = my
            return false
        elseif ruler.active then
            ruler.active = true
            return false
        end
    end
end


tpt.register_mouseclick(ruler.mouse)
tpt.register_keypress(ruler.key)
tpt.register_step(ruler.draw)

tpt.log("ruler loaded")