Quick definition:A method of registering shots in which a bullet is treated as an instant line from the weapon to its target, so the hit is decided immediately with no travel time.
Meaning
Hit scan is a way of handling gunfire in a game. When a player fires, the game immediately draws an invisible line from the weapon along the aiming direction and checks the first object it meets. If that object is an opponent, the damage is applied at once, and no bullet has to travel anywhere.
The alternative is a projectile weapon, where a bullet or rocket exists as an object that moves through the world over time, can be dodged, and drops or curves along its path. Many games mix both types, giving rifles a hit scan behaviour and launchers or bows a travelling projectile.
Hit scan is simpler for computers to calculate and tends to feel responsive in online play, since the result does not depend on a bullet travelling across a lagging connection. Visual effects such as tracer lines are often added so that players can see where a shot went.
Origin:The term describes how the game scans along a line in the direction the weapon points, checking whether anything lies in the way, a technique closely related to ray casting in computer graphics. It became a common description among players and developers of shooters, usually as a contrast to weapons whose bullets travel through the world as visible projectiles.
Example:In a competitive shooter, Chloe fires a rifle at an enemy across the map. Because the weapon uses hit scan, the shot lands the instant she clicks, and she does not need to aim ahead of a moving target. Her teammate, using a slower rocket launcher, has to predict where the enemy will be when the projectile arrives.
Did you know?Hit scan weapons are often seen as rewarding pure aim, while projectile weapons reward prediction. Balancing the two is a long-running design question, because an instant weapon with long range can become very powerful, so designers often limit it with low damage, slow firing or ammunition.
