第一次提交作业
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extends CharacterBody2D
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@export_category("移动参数")
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@export var double_press_interval := 0.3
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@export var move_speed: float = 75.0
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@export var acceleration: float = 600.0
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@export var deceleration: float = 800.0
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@export var jump_velocity: float = -190.0
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@onready var sprite: Sprite2D = $Sprite2D
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var flying : bool = false
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var last_space_press_time := -1000
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func _physics_process(delta: float) -> void:
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if !flying:
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apply_gravity(delta)
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handle_jump()
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else:
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handle_vertical_movement(delta)
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handle_horizontal_movement(delta)
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update_sprite_direction()
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move_and_slide()
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func apply_gravity(delta: float) -> void:
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if not is_on_floor():
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velocity += get_gravity() * delta
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func handle_vertical_movement(delta:float) -> void:
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var direction := Input.get_axis("squat", "jump")
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var target_speed := direction * jump_velocity
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if direction != 0.0:
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velocity.y = move_toward(
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velocity.y,
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target_speed,
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acceleration * delta
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)
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else:
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velocity.y = move_toward(
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velocity.y,
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0.0,
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acceleration * delta
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)
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func handle_horizontal_movement(delta: float) -> void:
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var direction := Input.get_axis("move_left", "move_right")
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var target_speed := direction * move_speed
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if direction != 0.0:
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velocity.x = move_toward(
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velocity.x,
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target_speed,
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acceleration * delta
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)
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else:
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velocity.x = move_toward(
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velocity.x,
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0.0,
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deceleration * delta
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)
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func handle_jump() -> void:
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if Input.is_action_just_pressed("jump") and is_on_floor():
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velocity.y = jump_velocity
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func update_sprite_direction() -> void:
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if velocity.x != 0.0:
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sprite.flip_h = velocity.x < 0.0
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func _unhandled_input(event: InputEvent) -> void:
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if event.is_action_pressed("fly") and !event.is_echo():
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handle_space_pressed()
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if event.is_action_pressed("dash") and not is_dashing:
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start_dash()
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func handle_space_pressed() -> void:
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var current_time := Time.get_ticks_msec()
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var elapsed_time := current_time - last_space_press_time
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if elapsed_time <= double_press_interval * 1000.0:
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flying = not flying
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last_space_press_time = -1000
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else:
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last_space_press_time = current_time
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signal died
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signal health_changed(current: int, max_hp: int)
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@export var max_hp: int = 3
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@export var knockback_force: float = 150.0
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var hp : int
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func _ready() -> void:
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hp = max_hp
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health_changed.emit(hp, max_hp)
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func take_damage():
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hp -= 1
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hp = max(hp, 0)
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health_changed.emit(hp, max_hp)
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apply_knockback()
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sprite.modulate = Color(1, 0, 0) # 变红
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await get_tree().create_timer(0.5).timeout # 等 0.5 秒
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sprite.modulate = Color(1, 1, 1)
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if hp <= 0:
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died.emit()
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queue_free()
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func apply_knockback():
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# 取当前水平运动方向，反方向给速度
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var dir = sign(velocity.x) # -1 或 1
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if dir == 0:
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dir = -1 # 静止时默认往左击退
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velocity.x = -dir * knockback_force
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velocity.y = -100
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func _on_spikes_01_body_entered(body: Node2D) -> void:
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if body.has_method("take_damage"):
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body.take_damage()
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print("你受伤了，还剩",hp,"点血") # Replace with function body.
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func _on_spikes_03_body_entered(body: Node2D) -> void:
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if body.has_method("take_damage"):
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body.take_damage()
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print("你受伤了，还剩",hp,"点血") # Replace with function body.
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func _on_spikes_02_body_entered(body: Node2D) -> void:
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if body.has_method("take_damage"):
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body.take_damage()
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print("你受伤了，还剩",hp,"点血") # Replace with function body.
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func _on_spikes_05_body_entered(body: Node2D) -> void:
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if body.has_method("take_damage"):
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body.take_damage()
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print("你受伤了，还剩",hp,"点血")
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func _on_spikes_04_body_entered(body: Node2D) -> void:
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if body.has_method("take_damage"):
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body.take_damage()
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print("你受伤了，还剩",hp,"点血")
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signal coin_changed(total: int) # 金币变化时通知 UI
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var coins: int = 0
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func add_coin(amount: int = 1) -> void:
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coins += amount
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coin_changed.emit(coins)
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print("金币：", coins)
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@export var dash_speed: float = 600.0 # 闪现速度
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@export var dash_time: float = 0.1 # 持续时间（秒）
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var is_dashing := false
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func start_dash():
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is_dashing = true
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# 朝当前面朝方向闪现
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var dir = 1 if not sprite.flip_h else -1
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velocity.x = dir * dash_speed
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velocity.y = 0
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await get_tree().create_timer(dash_time).timeout
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velocity.x = 0
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is_dashing = false
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func _on_spikes_06_body_entered(body: Node2D) -> void:
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if body.has_method("take_damage"):
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body.take_damage()
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print("你受伤了，还剩",hp,"点血")# Replace with function body.
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func _on_spikes_07_body_entered(body: Node2D) -> void:
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if body.has_method("take_damage"):
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body.take_damage()
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print("你受伤了，还剩",hp,"点血") # Replace with function body.
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func _on_spikes_08_body_entered(body: Node2D) -> void:
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if body.has_method("take_damage"):
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body.take_damage()
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print("你受伤了，还剩",hp,"点血") # Replace with function body.
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