Interaction detection

local objectList = {
    ['2291']          = true,
    ['2343']          = true,
    ['2723']          = true,
    ['2724']          = true,
    ['2356']          = true,
    ['1761']          = true,
    ['1762']          = true,
    ['2290']          = true,
    ['2124']          = true,
    ['1708']          = true,
    ['1713']          = true,
    ['1739']          = true,
    ['2090']          = true,
    ['2298']          = true,
    ['1798']          = true
};

local showingBar = false;

function hideBar()
    toggleInfoBar();
    showingBar = false;
end

function checkInteractableObjects( )
    local x, y, z, lx, ly, lz, roll, fov = getCameraMatrix()
    local fromX, fromY, fromZ = getElementPosition(getLocalPlayer())
    local toX = fromX + (lx - x)*3
    local toY = fromY + (ly - y)*3
    local toZ = fromZ + (lz - z)*3
    local hit, hitX, hitY, hitZ, hitlineElement, normalX, normalY, normalZ, material, lighting, piece, wmid, wmx, wmy, wmz, wmrx, wmry, wmrz   = processLineOfSight(fromX, fromY, fromZ+1, toX, toY, toZ, true, false, false, true, false, false, false, true, getLocalPlayer(), true)

    if hit then
        if hitlineElement then
            model = getElementModel( hitlineElement );
        elseif wmid ~= false then
            model = wmid;
        end

        if not showingBar and objectList[tostring(model)] == true then
             toggleInfoBar("Press 'B' to interact with this object!");
             setTimer(hideBar, 5000, 1);
            showingBar = true;
        end
    end
end

addEventHandler("onClientHUDRender", getRootElement(), checkInteractableObjects);