射线检测-unity

与最近物体碰撞取得位置：

    private Vector3 GetMousePoint()
    {
        Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
        RaycastHit hit;
        bool isCollider = Physics.Raycast(ray, out hit);
        if (isCollider)
        {
            return hit.point;
        }
        return Vector3.zero;
    }

与指定层的物体碰撞：

bool isCollider =Physics.Raycast(ray, out hit, 1000, LayerMask.GetMask("your define"));

另外collider相当于游戏物体了

hit.collider.GetComponent();