-- RunBullets
-- TracerCalc
-- Tracer
-- Fire
-- GetCameraLookVector
local c_workspace = game:GetService("Workspace");
local run_service = game:GetService("RunService");
local vector2 = Vector2.new;
local getinfo = debug.getinfo;
local cframenew = CFrame.new;
local camera = c_workspace.CurrentCamera;
local closest_player = nil;
local function get_closest_player()
    local closest, distance = nil, math.huge;
    for _, character in c_workspace:GetChildren() do
        if (character and character:FindFirstChild("Head")) then
            local w2s, onscreen = camera:WorldToViewportPoint(character.Head.Position);
            if onscreen then
                local dist = (vector2(w2s.X, w2s.Y) - vector2(camera.ViewportSize.X / 2, camera.ViewportSize.Y / 2)).Magnitude;

                if dist < distance then
                    closest = character;
                    distance = dist;
                end
            end
        end
    end
    return closest;
end
run_service.RenderStepped:Connect(function()
    closest_player = get_closest_player();
end)
local old_index; old_index = hookmetamethod(game, "__index", function(self, index)
    local func = getinfo(3, "n");
    if func and func.name then
        if (func.name == "Fire" and index == "CFrame") and (closest_player and closest_player:FindFirstChild("Head")) then
            return cframenew(closest_player.Head.Position); -- gun fight arena vs the notorious cframe.new...
        end
    end
    return old_index(self, index);
end)