全球访问者状态机处理程序move_and_slide问题

Question

我目前正在对我正在编码的statemachine遇到问题，发生的问题是，当我将move_and_slide添加到移动状态时，代码块的最后一个条件是遇到错误：

方法“ move_and_slide isn isn isn '当前课程中宣布

    extends Node2D

    class_name State

    var state_machine = null
    var player_velocity = Vector2()
    var player_speed = 200

    enum playerStates{IDLE, WALK, RUN, USE, SHOOT}
    enum ItemStates{ITEM_ON_GROUND, IS_EQUIPED}

   func _ready():
        if Global.player_isIdle == State.state_machine == playerStates.IDLE:
            pass
        if Global.player_isWalking == State.state_machine == playerStates.WALK:
            player_velocity = Global.player_velocity
    func handle_input(_event: InputEvent):
        if player_velocity != player_velocity.ZERO:
            if Global.player_isWalking == State.state_machine == playerStates.WALK:
                pass
            if Global.player_isRunning == State.state_machine == playerStates.RUN:
               if Input.is_action_pressed("sprint"):
                    player_speed = 300
            Global.player_velocity = Global.player_velocity.normalized() * player_speed
            Global.player_velocity = move_and_slide(Global.player_velocity)
    func _physics_process(_delta):
        pass

Answer 1

有一种称为move_and_slide的方法，但它属于kinematicbody2d（或其3D对应方）。

但是，您是在node2d中编写代码。正如错误消息告诉您的那样，对于node2d，没有move_and_slide。

由于在node2d中没有move_and_slide，因此您可以编写自己的方法称为move_and_slide可以执行任何操作。但是，我相信您想使用一种表单Kinematicbody2d。

因此，将node从node2d更改为kinematicbody2d（并在顶部更新脚本，在其中说扩展了Node2d说Kinematic Body2D）。在Godot编辑器中，您可以找到一个选项，以更改称为“ Change Type”的A Node的类型，它位于场景中的Node的上下文菜单中。

Answer 2

extends Node2D
class_name State

您的类正在扩展Node2D，但MOVE_AND_SLIDE来自Kinematicbody2d
尝试：

extends KinematicBody2D
class_name State

并且还使用move_and_slide在_PHYSICS_UPDATE函数中。
另外，不要忘记将播放器节点更改为 Kinematicbody2d

，如果您的班级是 player 节点的孩子，请喜欢：

extends Node2D

class_name State

    var state_machine = null
    var player_velocity = Vector2()
    var player_speed = 200

    var parent = get_parent() <<<<<<<<<<<<<<<< 

    enum playerStates{IDLE, WALK, RUN, USE, SHOOT}
    enum ItemStates{ITEM_ON_GROUND, IS_EQUIPED}

   func _ready():
        if Global.player_isIdle == State.state_machine == playerStates.IDLE:
            pass
        if Global.player_isWalking == State.state_machine == playerStates.WALK:
            player_velocity = Global.player_velocity
    
func handle_input(_event: InputEvent):
        if player_velocity != player_velocity.ZERO:
            if Global.player_isWalking == State.state_machine == playerStates.WALK:
                pass
            if Global.player_isRunning == State.state_machine == playerStates.RUN:
               if Input.is_action_pressed("sprint"):
                    player_speed = 300
            Global.player_velocity = Global.player_velocity.normalized() * player_speed
            
    
func _physics_process(_delta):
    Global.player_velocity = parent.move_and_slide(Global.player_velocity) <<<<<<<<<<