85 lines
2.1 KiB
GDScript
85 lines
2.1 KiB
GDScript
extends CameraToolBasic
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class_name ReedCameraFollowController
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const _CONSTANTS := preload("res://addons/reedcamera/_data/CameraSystemConst.gd")
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@export_group("Dead Zone")
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@export var dead_zone_ratio := Rect2(
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Vector2.ZERO, # 屏幕中心
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Vector2(0.4, 0.4) # 宽高（屏幕比例）
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)
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@export_group("Follow")
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@export var enabled_follow: bool = true
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@export var follow_lerp := 0.12 # 0~1，越大越“跟手”，越小越“蔚蓝感”的滞后
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var _follow_node2d : Node2D = null
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var _desired_pos := Vector2.ZERO
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var _camera: Camera2D = null
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func _update_follow(delta: float) -> void:
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if not enabled_follow:
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return
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if not _follow_node2d:
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return
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var cam := _get_camera_from_pointer()
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if not cam:
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return
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# 初始化
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if not _initialized:
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_pos = cam.global_position
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_desired_pos = _pos
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_initialized = true
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var view_rect := _get_camera_view_rect(cam)
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var dead_rect := _get_dead_zone_world_rect(view_rect)
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var p := player.global_position
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var delta_move := Vector2.ZERO
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if p.x < dead_rect.position.x:
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delta_move.x = p.x - dead_rect.position.x
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elif p.x > dead_rect.position.x + dead_rect.size.x:
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delta_move.x = p.x - (dead_rect.position.x + dead_rect.size.x)
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if p.y < dead_rect.position.y:
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delta_move.y = p.y - dead_rect.position.y
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elif p.y > dead_rect.position.y + dead_rect.size.y:
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delta_move.y = p.y - (dead_rect.position.y + dead_rect.size.y)
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if delta_move != Vector2.ZERO:
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_desired_pos += delta_move
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# 可选 room clamp
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if use_room_clamp:
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_desired_pos = _desired_pos.clamp(
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room_world_rect.position,
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room_world_rect.position + room_world_rect.size
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)
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# 蔚蓝感：滞后 lerp
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_pos = _pos.lerp(_desired_pos, follow_lerp)
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func _get_camera_from_pointer() -> Camera2D:
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if _camera:
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return _camera
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var p := get_parent()
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if p and p.has_method("get_camera"):
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_camera = p.get_camera() as Camera2D
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return _camera
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return _camera
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func _get_camera_view_rect(cam: Camera2D) -> Rect2:
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var screen_size := cam.get_viewport_rect().size
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var zoom := cam.zoom
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zoom.x = maxf(zoom.x, 0.001)
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zoom.y = maxf(zoom.y, 0.001)
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var size := screen_size / zoom
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return Rect2(cam.global_position - size * 0.5, size)
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