Question

我创建了一个小型的侧面滚动运动。

private Rigidbody2D rigid;
private BoxCollider2D playerCollider;
private bool isMovingRight = false;
private Vector2 movement;
private bool jumpPressed;

private const int MOVEMENT_SPEED = 5;
private const int JUMP_POWER = 5;
private const float GROUNDCHECK_TOLERANCE_SIDE = 0.05f;
private const float GROUNDCHECK_TOLERANCE_BOTTOM = 0.05f;

private void Start()
{
    rigid = GetComponent<Rigidbody2D>();
    playerCollider = GetComponent<BoxCollider2D>();
}

private void Update()
{
    SetMovement();
}

private void FixedUpdate()
{
    Move();
}

private void SetMovement()
{
    float horizontalMovement = Input.GetAxis("horizontal") * MOVEMENT_SPEED;

    if (Input.GetButtonDown("Jump"))
    {
        jumpPressed = true;
    }

    movement = new Vector2(horizontalMovement, rigid.velocity.y);
}

private void Move()
{
    if (GroundCheck(true) || GroundCheck(false))
    {
        if (jumpPressed)
        {
            movement.y = JUMP_POWER;
            jumpPressed = false;
        }
    }

    rigid.velocity = movement;
}

private bool GroundCheck(bool checkLeftSide)
{
    Bounds colliderBounds = playerCollider.bounds;
    Vector2 rayPosition = colliderBounds.center;

    float horizontalRayPosition = colliderBounds.extents.x + GROUNDCHECK_TOLERANCE_SIDE;

    if (checkLeftSide)
    {
        rayPosition.x -= horizontalRayPosition;
    }
    else
    {
        rayPosition.x += horizontalRayPosition;
    }

    return Physics2D.Raycast(rayPosition, Vector2.down, (playerCollider.size.y / 2) + GROUNDCHECK_TOLERANCE_BOTTOM);
}

我在Update中注册输入并在FixedUpdate中处理Physics。当按下跳跃按钮时，玩家跳跃工作正常。

但是当多次按下跳跃时，玩家会在空中跳起来，然后再跳下来跳一次。

因此，如果按下按钮超过1次，玩家将在完成第一次跳跃后再次跳跃。

我该如何避免这种行为？

Answer 1

使用您的代码，我添加了2条评论和其他声明，以澄清我在评论中的含义。这应该可以解决您的问题。

private void SetMovement()
{
    float horizontalMovement = Input.GetAxis("horizontal") * MOVEMENT_SPEED;

    if (Input.GetButtonDown("Jump"))
    {
        // Only ever gets set to false if you are grounded and it makes you jump.  
        // Should only be set to true if you can jump.  So you could add your groundChecks here... 
        // or use the method I am showing
        jumpPressed = true;   
    }

    movement = new Vector2(horizontalMovement, rigid.velocity.y);
}

private void Move()
{
    if (GroundCheck(true) || GroundCheck(false))
    {
        if (jumpPressed)
        {
            movement.y = JUMP_POWER; 
            // This was the only place this every was set to false, and 
            // specific conditions were required to make this happen.
            jumpPressed = false; 
        }
    }
    // fastest way to test
    else 
    {
         // yes they pressed jump but they can't jump so reset it, now 
         // they wont jump as soon as they land. just because they got 
         // trigger happy.
         jumpPressed = false; 
    }

    rigid.velocity = movement;
}

Unity输入触发两次

1 个答案: