184 lines
5.7 KiB
GDScript
184 lines
5.7 KiB
GDScript
@tool
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extends Node2D
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@export var enabled := true
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# 老鼠活动区域
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@export var action_area := Vector2(200, 30):
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set(val):
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action_area = val
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queue_redraw()
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@export var gizmo_outline_color := Color(0.565, 0.271, 0.318, 0.8):
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set(val):
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gizmo_outline_color = val
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queue_redraw()
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@export var move_speed := 70.0
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@export var distance_to_player_range := Vector2(50, 270)
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@export var random_wait_time_range := Vector2(0.5, 1.0)
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@export var random_wait_possibility := 0.4
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@export var random_mov_distace_range := Vector2(20, 50)
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@export var scatter_on_start := false
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@export var debug_scatter := false:
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set(val):
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debug_scatter = false
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if Engine.is_editor_hint():
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_init_mice(true)
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var mice = []
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# 大于 0 时等待，小于 0 时移动，abs()<0.1 时重新生成时间
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var random_wait_time: Array[float] = []
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var random_directions: Array[Vector2] = []
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var random_positions: Array[Vector2] = []
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var player
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func _ready() -> void:
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if Engine.is_editor_hint():
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queue_redraw()
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_init_mice()
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visibility_changed.connect(_on_visibility_changed)
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func _on_visibility_changed() -> void:
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if visible and is_node_ready() and not Engine.is_editor_hint():
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_init_mice()
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func _enter_tree() -> void:
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if is_node_ready() and not Engine.is_editor_hint():
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_init_mice()
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func flush_right_and_disable(_res = null) -> void:
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enabled = false
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var tween = create_tween()
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for i in range(mice.size()):
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var m = mice[i]
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m.flip_h = true
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if i == 0:
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tween.tween_property(m, "position:x", m.position.x + 10000, 100.0)
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else:
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tween.parallel().tween_property(m, "position:x", m.position.x + 10000, 100.0)
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func _init_mice(scatter := scatter_on_start) -> void:
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mice.clear()
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for c in get_children():
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if c is Node2D:
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mice.append(c)
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random_wait_time.resize(mice.size())
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random_directions.resize(mice.size())
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random_positions.resize(mice.size())
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for i in range(mice.size()):
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var m = mice[i]
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# clamp to action area
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if scatter:
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var pos = Vector2(randf() * action_area.x, randf() * action_area.y)
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m.position = pos
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random_positions[i] = m.position
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random_directions[i] = Vector2.ONE
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random_wait_time[i] = 0
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func _physics_process(delta: float) -> void:
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if Engine.is_editor_hint() or not enabled or not visible:
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return
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if not player:
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player = SceneManager.get_player()
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if not player:
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return
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var player_global_position = player.global_position
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# clamp to action area, 允许稍微大一点，防止卡位
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player_global_position.x = clampf(
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player_global_position.x, global_position.x - 2, global_position.x + action_area.x + 4
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)
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for i in range(mice.size()):
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var m = mice[i]
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var m_pos = m.position
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var m_global_pos = m.global_position
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var squared_distance = m_global_pos.distance_squared_to(player_global_position)
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var facing_right := true
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var direction = m_global_pos.direction_to(player_global_position)
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if squared_distance < pow(distance_to_player_range.x, 2):
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# move away
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facing_right = direction.x < 0
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if facing_right:
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m.position.x += move_speed * delta
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else:
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m.position.x -= move_speed * delta
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m.position.y -= direction.y * move_speed * delta
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random_wait_time[i] = -0.5 # 进入运动状态
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random_positions[i] = m.position
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elif squared_distance > pow(distance_to_player_range.y, 2):
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# move closer
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facing_right = direction.x > 0
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if facing_right:
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m.position.x += move_speed * delta
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else:
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m.position.x -= move_speed * delta
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m.position.y += direction.y * move_speed * delta
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random_wait_time[i] = -0.5 # 进入运动状态
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random_positions[i] = m.position
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else:
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if abs(random_wait_time[i]) < 0.1:
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random_wait_time[i] = (
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random_wait_time_range.x
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+ randf() * (random_wait_time_range.y - random_wait_time_range.x)
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)
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if randf() > random_wait_possibility:
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random_wait_time[i] *= -1
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# 一半概率等待，一半概率移动
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elif random_wait_time[i] > 0:
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random_wait_time[i] -= delta
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# random move, 每次移动后随机生成新的目标位置，避免老鼠在原地打转
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else:
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random_wait_time[i] += delta
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var target = random_positions[i]
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if target.distance_squared_to(m_pos) < 9:
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direction.y = randf_range(-0.5, 0.5)
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var x_diff = player_global_position.x - m_global_pos.x
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var diff_sign = signf(x_diff)
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# 大概率向 distance_to_player_range 的中间移动
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x_diff = (
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x_diff
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- (
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diff_sign
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* (distance_to_player_range.x + distance_to_player_range.y)
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* 0.5
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)
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)
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# 75% 的概率向 x_diff 移动
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if signf(x_diff) > 0:
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direction.x = 1 if randf() < 0.7 else -1
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else:
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direction.x = -1 if randf() < 0.7 else 1
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random_directions[i] = direction
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var random_dis = (
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random_mov_distace_range.x
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+ randf() * (random_mov_distace_range.y - random_mov_distace_range.x)
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)
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target = direction * random_dis + m_pos
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# clamp to action area，稍小于 action_area，避免老鼠在边缘打转
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# random_positions[i] = target.clamp(Vector2(2, 2), action_area - Vector2(4, 4))
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random_positions[i] = target.clamp(Vector2.ZERO, action_area)
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facing_right = target.x > m_pos.x
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var delta_max = move_speed * delta
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m_pos = m.position
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m.position.x = move_toward(m_pos.x, target.x, delta_max)
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m.position.y = move_toward(m_pos.y, target.y, delta_max)
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# set flip h
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m.flip_h = not facing_right
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# clamp to action area
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m.position = m.position.clamp(Vector2.ZERO, action_area)
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func _draw() -> void:
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if Engine.is_editor_hint():
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# draw gizmo: 老鼠活动区域
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var action_area_rect = Rect2(Vector2.ZERO, action_area)
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# fill
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var fill_color = gizmo_outline_color
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fill_color.a = 0.4
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draw_rect(action_area_rect, fill_color)
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# outline
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draw_rect(action_area_rect, gizmo_outline_color, false, 1.0)
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