feat: add witnessed knowledge and wind ambience

simulation/knowledge/EventKnowledgeSystem.gd

@@ -0,0 +1,105 @@
+class_name EventKnowledgeSystem
+extends RefCounted
+
+const WITNESS_RADIUS := 10.0
+
+var known_events: Dictionary = {}
+
+
+func observe_event(event: EconomicEventRecord, npcs: Array[SimNPC]) -> Array[KnownEventStateRecord]:
+	var learned: Array[KnownEventStateRecord] = []
+	if not _is_witnessable(event):
+		return learned
+	var actor := _find_npc(int(event.data["actor_id"]), npcs)
+	if actor == null:
+		return learned
+	var actor_record := _remember(actor.id, int(event.data["event_id"]))
+	if actor_record != null:
+		learned.append(actor_record)
+	var witness_radius_squared := WITNESS_RADIUS * WITNESS_RADIUS
+	var event_position := event.get_world_position()
+	for npc in npcs:
+		if npc.id == actor.id or npc.is_dead:
+			continue
+		if npc.position.distance_squared_to(event_position) > witness_radius_squared:
+			continue
+		var witness_record := _remember(npc.id, int(event.data["event_id"]))
+		if witness_record != null:
+			learned.append(witness_record)
+	learned.sort_custom(_sort_records)
+	return learned
+
+
+func knows_event(knower_id: int, event_id: int) -> bool:
+	return known_events.has(_key(knower_id, event_id))
+
+
+func get_knowers(event_id: int) -> Array[int]:
+	var knower_ids: Array[int] = []
+	for record in known_events.values():
+		if record.get_event_id() == event_id:
+			knower_ids.append(record.get_knower_id())
+	knower_ids.sort()
+	return knower_ids
+
+
+func get_known_event_ids(knower_id: int, max_count: int = 3) -> Array[int]:
+	var event_ids: Array[int] = []
+	for record in known_events.values():
+		if record.get_knower_id() == knower_id:
+			event_ids.append(record.get_event_id())
+	event_ids.sort()
+	if max_count <= 0 or event_ids.size() <= max_count:
+		return event_ids
+	var recent_ids: Array[int] = []
+	for index in range(event_ids.size() - max_count, event_ids.size()):
+		recent_ids.append(event_ids[index])
+	return recent_ids
+
+
+func get_all_sorted() -> Array[KnownEventStateRecord]:
+	var records: Array[KnownEventStateRecord] = []
+	for record in known_events.values():
+		records.append(record)
+	records.sort_custom(_sort_records)
+	return records
+
+
+func restore(records: Array[KnownEventStateRecord]) -> void:
+	known_events.clear()
+	for record in records:
+		known_events[_key(record.get_knower_id(), record.get_event_id())] = record
+
+
+func _remember(knower_id: int, event_id: int) -> KnownEventStateRecord:
+	var key := _key(knower_id, event_id)
+	if known_events.has(key):
+		return null
+	var record := KnownEventStateRecord.create(knower_id, event_id)
+	known_events[key] = record
+	return record
+
+
+func _is_witnessable(event: EconomicEventRecord) -> bool:
+	return (
+		StringName(event.data["event_type"]) == SimulationIds.EVENT_STORAGE_DEPOSITED
+		and StringName(event.data["item_id"]) == SimulationIds.RESOURCE_FOOD
+		and float(event.data["amount"]) > 0.0
+	)
+
+
+static func _find_npc(npc_id: int, npcs: Array[SimNPC]) -> SimNPC:
+	for npc in npcs:
+		if npc.id == npc_id:
+			return npc
+	return null
+
+
+static func _key(knower_id: int, event_id: int) -> String:
+	return "%d:%d" % [knower_id, event_id]
+
+
+static func _sort_records(first: KnownEventStateRecord, second: KnownEventStateRecord) -> bool:
+	if first.get_knower_id() != second.get_knower_id():
+		return first.get_knower_id() < second.get_knower_id()
+	return first.get_event_id() < second.get_event_id()