1. extends Node2D
  3. onready var dd= $"Rect739"
  4. var vel = Vector2.RIGHT.rotated(deg2rad(-45)) * 10
  5. var g = 9.8
  6. var start_pos
  8. func _ready():
  9.     start_pos = dd.position
  10.     set_process(false)
  12. func _process(delta):
  13.     vel.y += g * delta
  14.     dd.position += vel
  16. func _on_Button_pressed():
  17.     dd.position = start_pos
  18.     vel = Vector2.RIGHT.rotated(deg2rad(-45)) * 10
  19.     set_process(true)
  20.     pass

screenshots.gif

  1. extends Node2D
  3. var speed = 10.0  # 移动速度
  4. var vel = Vector2.ZERO  # 速度向量
  5. var g = 9.8 # 重力加速度
  6. var start_pos # 子弹的初始位置，用于复位
  9. onready var dd= $"dd" # 子弹
  11. func _ready():
  12.     # 水平向右逆时针旋转45度，也就是斜向上45度
  13.     vel = Vector2.RIGHT.rotated(deg2rad(-45)) * speed
  14.     start_pos = dd.position   # 记录子弹初始位置，用于复位
  15.     dd.rotation_degrees = rad2deg(vel.angle()) # 设置初始朝向
  16.     set_process(false) # 禁用帧处理
  18. func _process(delta):
  19.     vel.y += g * delta  # 每帧加上重力影响
  20.     dd.rotation_degrees = rad2deg(vel.angle()) # 更新子弹朝向
  21.     dd.position += vel  # 移动
  23. # 按下开始按钮
  24. func _on_Button_pressed():
  25.     vel = Vector2.RIGHT.rotated(deg2rad(-45)) * speed
  26.     dd.position = start_pos  # 子弹复位
  27.     dd.rotation_degrees = rad2deg(vel.angle()) # 设置初始朝向
  28.     set_process(true)
  29.     pass

screenshots.gif

继续改进

image.pngimage.pngimage.png

  1. extends Node2D
  3. var speed = 50.0  # 移动速度
  4. var vel = Vector2.ZERO  # 速度向量
  5. var g = 9.8 # 重力加速度
  6. var is_dd_flying = false # 子弹在飞:)
  8. onready var dd= $"dd" # 子弹
  9. onready var pos2d= $"base/body/Position2D"
  10. onready var pao_body= $"base/body"
  12. func _unhandled_input(event):
  13.     if event is InputEventMouseButton:
  14.         if event.button_index == BUTTON_LEFT:
  15.             if event.is_pressed():
  16.                 if not is_dd_flying:
  17.                     is_dd_flying = true
  19. func _process(delta):
  21.     if is_dd_flying:
  22.         vel = Vector2.RIGHT.rotated(deg2rad(dd.rotation_degrees)) 
  23.         vel.y += g * delta  # 每帧加上重力影响
  24.         dd.rotation_degrees = rad2deg(vel.angle()) # 更新子弹朝向
  25.         dd.global_position += vel * speed# 移动
  26.     else:
  27.         pao_body.look_at(get_global_mouse_position())
  28.         dd.global_position= pos2d.global_position  # 子弹跟随炮筒的尖端位置
  29.         dd.rotation_degrees = pos2d.global_rotation_degrees # 朝向与炮筒一致
  33. func _on_VisibilityNotifier2D_screen_exited():
  34.     is_dd_flying = false
  35.     pass

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