class_name EmitContext
extends RefCounted
## Everything an emitter is allowed to see. Keeping this narrow is what lets a
## unit test fire a boss pattern into a bare [BulletPool] with no world at all.

var pool: BulletPool
## Where the shots come from (the emitting actor's position).
var origin := Vector2.ZERO
## Nearest live player, used by aimed emitters. Falls back to [member origin]
## plus a down vector when nobody is alive.
var target := Vector2.ZERO
var has_target := false
## Ticks since the emitting actor entered its current phase.
var local_tick := 0
## How many times this emitter has fired in this phase. Drives spin/step.
var shot_index := 0
var rng: RandomNumberGenerator


func aim_angle() -> float:
	if not has_target:
		return PI * 0.5
	return (target - origin).angle()