Initial project sync
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extends SceneTree
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## 第四轮修复契约（2026-07-05，07-06 修订）：
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## 1. 小怪击退：残速不再被 AI 每帧接管清零，产生实际水平滑行；
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## 垂直击退后假高度轴正常积分并落地复位 Grounded（修复"被剑雨/下砸
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## 打过一次后 ground_state 永久 Airborne、小怪从此不能出招"的隐藏 bug）。
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## 2. 趔趄门禁：击退滑行期间 Boss/小怪不得起手新动作（EnemyActionDriver
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## 钩子），否则动作突进立刻接管 velocity 冲回玩家，把击退整个吃掉
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## （真实 stage 实测净位移为负）；Boss 受击链强制撤退豁免（清残速标志）。
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## 3. 关卡背景单层视差：背景水平速度为相机 0.8 倍（0.92 肉眼难辨已加强），
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## 锚点 2047，无相机保持原位；脚下地砖轻微滑动是单张烙死原画的已知
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## 取舍，无伤视差待美术拆层。
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## （Boss 击退 ×9 的加码钉在 test_round3_fixes。）
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var failures: Array[String] = []
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func _init() -> void:
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_run.call_deferred()
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func _run() -> void:
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root.size = Vector2i(1152, 648)
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var settings := root.get_node_or_null("GameSettings")
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if settings != null:
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settings.call("set_difficulty", &"easy")
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await _check_minion_horizontal_knockback()
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await _check_minion_vertical_knockback_recovers()
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await _check_stagger_gates_enemy_actions()
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await _check_boss_to_player_knockback()
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await _check_background_parallax()
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_finish()
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func _make_minion() -> Node2D:
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var scene: PackedScene = load("res://scenes/enemies/minion.tscn")
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var minion := scene.instantiate() as Node2D
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root.add_child(minion)
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# 与 test_minion_phase_system 同款：关 AI，排除追击/巡逻对位移的污染。
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var behavior := minion.get_node_or_null("MinionBehavior")
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if behavior != null:
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behavior.set("enabled", false)
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minion.set("approach_direction", 0.0)
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return minion
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func _check_minion_horizontal_knockback() -> void:
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var minion := _make_minion()
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await process_frame
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minion.global_position = Vector2(500.0, 300.0)
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var motor := minion.get_node("MovementMotor")
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var start_x := minion.global_position.x
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motor.call("apply_knockback", Vector2(120.0, 0.0))
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await physics_frame
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await physics_frame
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await physics_frame
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_expect((minion as CharacterBody2D).velocity.x > 0.0, "小怪击退残速不再被 AI 每帧清零")
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for _index: int in range(40):
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await physics_frame
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var displacement := minion.global_position.x - start_x
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_expect(displacement > 5.0, "小怪击退产生实际水平滑行（got %.2f px）" % displacement)
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_expect(not bool(motor.call("has_knockback_stray")), "残速衰减完后 stray 标志自清（AI 可恢复接管）")
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minion.free()
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func _check_minion_vertical_knockback_recovers() -> void:
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var minion := _make_minion()
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await process_frame
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minion.global_position = Vector2(500.0, 300.0)
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var motor := minion.get_node("MovementMotor")
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var state_machine := minion.get_node("StateMachine")
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motor.call("apply_knockback", Vector2(0.0, 300.0))
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await physics_frame
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_expect_equal(state_machine.call("get_ground_state"), &"Airborne", "垂直击退令小怪进入 Airborne")
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var landed := false
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for _index: int in range(180):
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await physics_frame
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if state_machine.call("get_ground_state") == &"Grounded" \
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and is_zero_approx(float(minion.get("height"))) \
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and is_zero_approx(float(minion.get("height_speed"))):
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landed = true
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break
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_expect(landed, "垂直击退后小怪应自然落地复位 Grounded（旧版永久卡 Airborne 导致无法出招）")
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minion.free()
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func _check_stagger_gates_enemy_actions() -> void:
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# Boss：击退滑行期间不得起手新动作；强制撤退清残速后恢复。
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var boss_scene: PackedScene = load("res://scenes/enemies/boss.tscn")
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var boss := boss_scene.instantiate() as Node2D
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root.add_child(boss)
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await process_frame
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boss.set("combat_enabled", true)
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boss.set("stationary", false)
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# 用不解析的动作 ID 旁路 BossBehaviorTree 的相位限型分支（melee/ranged
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# 按时间相位限制与本契约无关），只隔离趔趄门禁本身。
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var boss_motor := boss.get_node("MovementMotor")
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_expect(bool(boss.call("can_start_enemy_action", &"__stagger_probe__")), "无击退时 Boss 可正常起手")
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boss_motor.call("apply_knockback", Vector2(120.0, 0.0))
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_expect(not bool(boss.call("can_start_enemy_action", &"__stagger_probe__")),
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"击退滑行（趔趄）期间 Boss 不得起手新动作——否则突进会吃掉击退位移")
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boss_motor.call("clear_knockback_stray")
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_expect(bool(boss.call("can_start_enemy_action", &"__stagger_probe__")),
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"清残速标志后恢复起手（受击链强制撤退走此豁免）")
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boss.free()
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# 小怪：同款门禁。
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var minion := _make_minion()
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await process_frame
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var minion_motor := minion.get_node("MovementMotor")
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_expect(bool(minion.call("can_start_enemy_action", &"__stagger_probe__")), "无击退时小怪可正常起手")
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minion_motor.call("apply_knockback", Vector2(120.0, 0.0))
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_expect(not bool(minion.call("can_start_enemy_action", &"__stagger_probe__")),
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"击退滑行期间小怪不得起手新动作")
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minion.free()
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func _check_boss_to_player_knockback() -> void:
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# 2026-07-06 策划（连续三轮）："Boss 对玩家没有任何击退效果"。两个根因：
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# ①Boss 近战沿用默认基准 120，普通连段倍率 0.4/0.5 → 位移仅 2~3px，且相机
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# 1:1 跟随玩家把位移完全吃进视觉；②敌方弹丸基准击退 (0,0)，未来相位
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# Boss 只用远程 → 恒为零。修复=Boss 近战基准 ×3 初速 + 敌弹补基准。
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var boss_scene: PackedScene = load("res://scenes/enemies/boss.tscn")
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var boss := boss_scene.instantiate()
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root.add_child(boss)
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await process_frame
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var emitter := boss.get_node("DamageEmitter")
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_expect((emitter.get("base_knockback") as Vector2).is_equal_approx(Vector2(360.0, 304.056)),
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"Boss 近战基准击退 ×3 初速（普通连段 2px→20~32px、重击 190~343px）")
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boss.free()
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var container: Node2D = (load("res://scenes/stage/actors_container.gd") as GDScript).new()
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root.add_child(container)
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container.call("_on_projectile_requested", null, Vector2.ZERO, Vector2.LEFT, {"team": &"enemy"})
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await process_frame
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var bullet := container.get_child(0)
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_expect((bullet.get("base_knockback") as Vector2).is_equal_approx(Vector2(360.0, 0.0)),
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"敌方弹丸补上基准击退（未来相位不再恒为零，弹丸不击飞）")
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_expect_float(float(bullet.get("speed")), 416.0, "敌弹速度保持 416 不受击退注入影响")
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container.free()
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func _check_background_parallax() -> void:
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var scene: PackedScene = load("res://scenes/ground/ground1.tscn")
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var ground := scene.instantiate()
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root.add_child(ground)
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await process_frame
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await process_frame
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var art_layer := ground.get_node("ArtLayer") as Node2D
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# 无相机：背景保持原位（headless/菜单兜底）。
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_expect_float(art_layer.position.x, 896.5, "无相机时背景保持基准位置")
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# 有相机：偏移 = (相机中心 - 1734.5) × 0.8——"远景天幕"语义，背景 80%
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# 跟随相机，仅 0.2 倍速随世界滚动，保证远景夕阳时刻在画面内（策划定案）。
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var camera := Camera2D.new()
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root.add_child(camera)
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camera.make_current()
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camera.global_position = Vector2(2547.0, 395.0)
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await process_frame
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await process_frame
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_expect_float(art_layer.position.x, 896.5 + (2547.0 - 1734.5) * 0.8, "背景 80% 跟随相机（天幕视差）")
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camera.global_position = Vector2(1547.0, 395.0)
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await process_frame
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await process_frame
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_expect_float(art_layer.position.x, 896.5 + (1547.0 - 1734.5) * 0.8, "相机左移时天幕对称跟随")
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camera.free()
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ground.free()
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func _expect(condition: bool, label: String) -> void:
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if not condition:
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failures.append(label)
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func _expect_equal(actual: Variant, expected: Variant, label: String) -> void:
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if actual != expected:
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failures.append("%s: expected %s, got %s" % [label, expected, actual])
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func _expect_float(actual: float, expected: float, label: String) -> void:
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if not is_equal_approx(actual, expected):
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failures.append("%s: expected %.4f, got %.4f" % [label, expected, actual])
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func _finish() -> void:
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paused = false
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if failures.is_empty():
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print("PASS round4 fixes")
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quit(0)
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else:
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for failure: String in failures:
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push_error(failure)
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quit(1)
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