code/modules/projectiles/projectile.dm

MOVES_HITSCAN	Not actually hitscan but close as we get without actual hitscan.
MUZZLE_EFFECT_PIXEL_INCREMENT	How many pixels to move the muzzle flash up so your character doesn't look like they're shitting out lasers.
/proc/calculate_projectile_angle_and_pixel_offsets	Calculates the pixel offsets and angle that a projectile should be launched at.

Define Details

Not actually hitscan but close as we get without actual hitscan.

How many pixels to move the muzzle flash up so your character doesn't look like they're shitting out lasers.