Collider2D.bounds 是检查地面脚本中非静态字段所必需的

Question

我正在创建检查地面脚本，但在 Collider2D.bounds 上显示错误 非静态字段、方法或属性需要对象引用 'Collider2D.bounds'

有剧本：

public class PlayerScript : MonoBehaviour
{
    [SerializeField] float speed = 10f;
    
    private Animation rotate_anim;
    // Start is called before the first frame update
    void Start()
    {
        rotate_anim = GetComponent<Animation>();
    }

    // Update is called once per frame
    void Update()
    {
        Jump();
    }
    void Jump(){
        //not there
    }
    private bool isGrounded(){
        RaycastHit2D raycasthit2d = Physics2D.BoxCast(CircleCollider2D.bounds.center, CircleCollider2D.bounds.size, 0f, Vector2.down * 1f);
        return raycasthit2d.collider !=null;
    }
 }

Answer 1

在尝试访问 class 本身时，您需要访问 CircleCollider2D class 的实例。当您尝试访问 class 时，您只能使用静态方法，因为运行时无法知道您正在尝试访问 class 的哪个实例。首先，您需要在 Start 方法中将碰撞器组件附加到您的播放器，就像您对 Animation

所做的那样

private Animation rotate_anim;
private CircleCollider2D collider;
// Start is called before the first frame update
void Start()
{
    rotate_anim = GetComponent<Animation>();
    collider = GetComponent<CircleCollider2D>();
}

接下来需要给BoxCast函数提供collider

RaycastHit2D raycasthit2d = Physics2D.BoxCast(collider.bounds.center, collider.bounds.size, 0f, Vector2.down * 1f);

Collider2D.bounds 是检查地面脚本中非静态字段所必需的

Collider2D.bounds is required for non static field on check ground script

c#

unity3d