---For Developers--- The aiming mechanic in Doom is kindof infamous. To aim, lining up the gun was all that mattered. No being on the same height, you couldn't even look up. So to say, you could be on the floor, the enemy at the ceiling, and you be lined up and kill the enemy. Wooh, that was an explaination to end all explainations. A nutshell explaination will be provided.