Strafing next to a wall and jumping makes player avoid damage

[Descen]

To say, "strafehumping" a wall then jumping at the right moment let's you avoid the damage from the projectile. Noticed this while testing my map, having a narrow 64 units wide corridor with the shooter at the end. Inside the corridor I pressed my move left key (A) next to the wall to gain extra momentum and when the projectile was near I jumped while still holding the strafe key. (I made the corridor in a way it's impossible to actually jump over the projectile). The projectile hit me while I was airborne, but dealt no damage, just simply ceased with the sound and impact sprite.
Jumping and strafing without "humping" the wall, the projectile can hurt you.

[Adambean]

The damage is dealt when something touches the projectile and a valid trace line can be made to the touching entity:

svencoop-script-projectile-shooter/scripts/maps/projectile_shooter.as

Lines 1304 to 1309 in 22441cf

	// Damage
	TraceResult tr;
	if (pOther !is null and pOther.pev.takedamage != DAMAGE_NO) {
	// Hit an entity
	g_Utility.TraceLine(self.pev.origin, pOther.pev.origin, dont_ignore_monsters, self.edict(), tr);
	if (g_EntityFuncs.Instance(tr.pHit) == pOther) {

If you're seeing the projectile vanish on touch (e.g. an impact sprite/sound/trigger plays) this will mean there isn't a valid trace line between the projectile and hit entity.

Does armor damage work in this case? That doesn't depend on a trace line.

[Descen]

Tried out with armor. No damage dealt to armor either.