Hitscan
From Doom Wiki
Hitscan attacks hit or miss their target the very moment the attack is launched, and therefore cannot be dodged. All melee and bullet attacks work like this; there are no projectiles involved, invisible or otherwise. Melee attacks have a range of 64 units and bullet attacks a range of 2048 units.
Melee attacks are monster and weapon specific, but the damage done by a single bullet is a fixed (though randomized) value. The damage caused by a ranged hitscan attack only varies (excluding the randomization) according to the number of bullets fired by the weapon or monster. In addition, the damage dealt by player and monster bullet hitscan attacks is slightly different: player bullets do 5 to 15 and monster bullets 3 to 15 hit points of damage.


