为什么变量的值不变

Question

((对不起我的英语不好)) 我在其中一个脚本中创建了一个公共静态布尔变量并将其命名为

inDamage

。然后我根据价值使用它。在另一个脚本中，我使用 RayCast，如果光线撞击对撞机，

inDamage = true

，否则 - 错误。这个脚本（带有 RayCast）在几个对象上，也许这就是问题所在。但是如果我删除了这个脚本的所有副本，除了一个，它就不会工作。那么为什么变量的值没有改变呢？

有脚本：

Ray2D ray2D = new Ray2D(transform.position, transform.right); 
RaycastHit2D hitInfo = Physics2D.Raycast(ray2D.origin, ray2D.direction, 10); 
if (hitInfo.collider.CompareTag("Player")) 
{     
    ScriptName.inDamage = true; 
} 
else 
{     
    ScriptName.inDamage = false; 
}

我试图让这个变量不是静态的，并在声明它的脚本中更改值，它起作用了。但我需要从 RayCast 获取信息。

完整脚本：

public class Light : MonoBehaviour
{
    public int DefaultLenght = 10; // Length of ray if it doesn't hit anything
    public int MaxReflectionCount = 5; // Max count of ray reflections

    private List<Vector3> _hitPoints = new List<Vector3>();
    private LineRenderer _lineRenderer;

    void Awake()
    {
        _lineRenderer = GetComponent<LineRenderer>();
    }

    void FixedUpdate()
    {
        RaycastWithReflection();
    }

    private void RaycastWithReflection()
    {
        _hitPoints.Clear(); // Clearing array of points to move line in a new frame
        _hitPoints.Add(transform.position); // Adding starting point into the array

        Ray2D ray2D = new Ray2D(transform.position, transform.right);

        while (_hitPoints.Count <= MaxReflectionCount) // Line will reflect till it reaches the max count of ray reflections
        {
            RaycastHit2D hitInfo = Physics2D.Raycast(ray2D.origin, ray2D.direction, 10); // Variable with an information about raycast


            if (hitInfo.collider.CompareTag("Mirror")) // Ray will reflect if it hits the mirror
            {
                _hitPoints.Add(hitInfo.point);
                ray2D.origin = hitInfo.point - ray2D.direction * 0.01f;
                ray2D.direction = Vector2.Reflect(ray2D.direction, hitInfo.normal);
            }
            else if (hitInfo.collider.CompareTag("Untagged")) // Ray ends if it collides with a regular wall
            {
                _hitPoints.Add(hitInfo.point);
            }
            else // If ray is not colliding with anything its length equals DefaultLength
            {
                _hitPoints.Add(ray2D.origin + ray2D.direction * DefaultLenght);
            }
            
         Vampire.inDamage = hitInfo.collider.CompareTag("Player");
        }

        _lineRenderer.positionCount = _hitPoints.Count;
        _lineRenderer.SetPositions(_hitPoints.ToArray()); // Finally, rendering the ray itself
    }
}

Answer 1

我认为问题在于静态 bool 是由 while 循环中的几个光线投射设置的。他们中的大多数将值设置为 false。因此，当光线命中并且 inDamage 设置为 true 时，它会立即被下一个光线投射覆盖为 false。

Answer 2

我想你想要达到的目标是用镜子中的一些反射等来击中玩家

所以实际上，一旦你击中玩家，我猜你只是不想进一步处理任何光线，只是做例如

private void RaycastWithReflection()
{
    _hitPoints.Clear(); // Clearing array of points to move line in a new frame
    _hitPoints.Add(transform.position); // Adding starting point into the array

    Ray2D ray2D = new Ray2D(transform.position, transform.right);

    // Line will reflect till it reaches the max count of ray reflections
    // OR hits the player
    while (_hitPoints.Count <= MaxReflectionCount) 
    {
        var hitInfo = Physics2D.Raycast(ray2D.origin, ray2D.direction, 10); 

        // Ray will reflect if it hits the mirror
        if (hitInfo.collider.CompareTag("Mirror")) 
        {
            _hitPoints.Add(hitInfo.point);
            ray2D.origin = hitInfo.point - ray2D.direction * 0.01f;
            ray2D.direction = Vector2.Reflect(ray2D.direction, hitInfo.normal);
        }
        // Ray ENDS if it collides with a regular wall
        else if (hitInfo.collider.CompareTag("Untagged")) 
        {
            _hitPoints.Add(hitInfo.point);
            // leave the while loop -> no further raycasts!
            break;
        }
        // Ray ENDS if it hits the player and sets Vampire.inDamage
        else if(hitInfo.collider.CompareTag("Player"))
        {
            Vampire.inDamage = true;
            // leave the while loop -> no further raycasts!
            break;
        }
        // If ray is not colliding with anything its length equals DefaultLength and ENDS
        else
        {
            _hitPoints.Add(ray2D.origin + ray2D.direction * DefaultLenght);
            // leave the while loop -> no further raycasts!
            break;
        }
    }

    // Finally, rendering the ray itself
    _lineRenderer.positionCount = _hitPoints.Count;
    _lineRenderer.SetPositions(_hitPoints.ToArray()); 
}

然后实际处理

Vampire.inDamage

的人也将负责事后重置它，这样可能有多个此脚本实例就不会成为问题