69 lines
2.6 KiB
GDScript
69 lines
2.6 KiB
GDScript
extends Node2D
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## 2026-07-07 视差修正：当前美术图里地面/步道和远景烙在同一张图上。
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## 为了让角色脚下参照物保持 1:1 世界坐标，ArtLayer 先作为 WorldGroundLayer
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## 固定不随相机做视差。未来美术拆出天空/夕阳后，把远景节点放入
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## SkyParallaxLayer，即可继续按 0.2 倍世界滚动（80% 跟随相机）。
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## 勿用 Parallax2D（历史上因 CanvasModulate/wipe 兼容性移除过，见 decisions.md）。
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const PARALLAX_SCROLL_SCALE := 0.2
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const PARALLAX_ANCHOR_X := 1734.5
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@onready var past_background: CanvasItem = $ArtLayer/PastBackground
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@onready var future_background: CanvasItem = $ArtLayer/FutureBackground
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@onready var _world_ground_layer: Node2D = $ArtLayer
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@onready var _sky_parallax_layer: Node2D = get_node_or_null("SkyParallaxLayer") as Node2D
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var _world_ground_base_x := 0.0
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var _sky_parallax_base_x := 0.0
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func _ready() -> void:
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_world_ground_base_x = _world_ground_layer.position.x
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if _sky_parallax_layer != null:
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_sky_parallax_base_x = _sky_parallax_layer.position.x
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_set_time_phase(_current_time_phase())
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var bus := _event_bus_or_null()
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if bus != null and bus.has_signal("time_phase_changed") and not bus.is_connected("time_phase_changed", _on_time_phase_changed):
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bus.connect("time_phase_changed", _on_time_phase_changed)
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func _process(_delta: float) -> void:
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_world_ground_layer.position.x = _world_ground_base_x
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if _sky_parallax_layer == null:
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return
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var camera := get_viewport().get_camera_2d()
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if camera == null:
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# headless 测试/无相机场景：远景层也保持原位。
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_sky_parallax_layer.position.x = _sky_parallax_base_x
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return
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# get_screen_center_position 含 limit 夹取，玩家贴墙时远景不会继续滑。
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var center_x := camera.get_screen_center_position().x
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_sky_parallax_layer.position.x = _sky_parallax_base_x + (center_x - PARALLAX_ANCHOR_X) * (1.0 - PARALLAX_SCROLL_SCALE)
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func _on_time_phase_changed(_previous: StringName, current: StringName, _reason: StringName) -> void:
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_set_time_phase(current)
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func _set_time_phase(time_phase: StringName) -> void:
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var use_future := time_phase == &"future"
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if past_background != null:
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past_background.visible = not use_future
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if future_background != null:
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future_background.visible = use_future
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func _current_time_phase() -> StringName:
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if not is_inside_tree():
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return &"past"
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var manager := get_tree().root.get_node_or_null("TimePhaseManager")
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if manager != null:
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return StringName(str(manager.get("current_time_phase")))
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return &"past"
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func _event_bus_or_null() -> Node:
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if not is_inside_tree():
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return null
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return get_tree().root.get_node_or_null("EventBus")
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