Projectiles that pierce, bounce off enemies and wait to turn back

This is Apoli 1.117.0 and Origins 1.47.10, on Fabric 1.20.1, Fabric 1.21.1 and NeoForge 1.21.1. Origins only moves up to build against the new Apoli, so update both sides together.

All three additions are fields on apoli:fire_projectile, as a power and as an entity action. Together they're enough for a proper boomerang: one that cuts through a crowd, comes back through it, and stays out for as long as you hold the key.

Passing through

pierce lets a projectile fly on through the entities it hits. Each one takes the hit actions once, and can only be hit again after the projectile bounces off a block or turns back, so a returning shot cuts through the same crowd on its way home. -1 passes through everything, and a positive number through that many. See Passing through.

Bouncing off enemies

The reflective object has a new entities field. With it, a projectile glances off the side of the hitbox it struck, after the hit actions have run, and bounces off walls and enemies alike until max_bounces is spent. It can't hit the enemy it just bounced off again straight away, so paired with homing it ricochets from one target to the next. See Bouncing off enemies.

Holding a projectile out

return takes a condition, a bi-entity condition with the owner as the actor and the projectile as the target. A turn that after or max_distance calls for waits until it passes, so "keep the boomerang out while the key is held" is one field instead of a return you write by hand. A hit that turns the projectile around is never held back, and lifetime still ends a shot that is held out too long.

Summons appear where they're put

A minion or clone that its bientity_action moves, such as a wall raised in front of you or a trap placed under an enemy, used to show up at its summoner's feet for a few ticks before sliding to its spot. Players watching now see it appear in place. Nothing changes for summons that stay where they were spawned.