c# - 增加 Vector3 的 Y 值

Question

我现在正在使用 Unity 重新学习 3D 数学并修补示例相机 Controller 。默认情况下，它会聚焦在一个目标上，在本例中是玩家，但我想为其添加一个偏移量，使其聚焦在玩家头顶上方。

namespace UnityStandardAssets._2D
{
    public class Camera2DFollow : MonoBehaviour
    {
        public Transform target;
        public float damping = 1;
        public float lookAheadFactor = 3;
        public float lookAheadReturnSpeed = 0.5f;
        public float lookAheadMoveThreshold = 0.1f;

        private float m_OffsetZ;
        private Vector3 m_LastTargetPosition;
        private Vector3 m_CurrentVelocity;
        private Vector3 m_LookAheadPos;

        // Use this for initialization
        private void Start()
        {
            m_LastTargetPosition = target.position;
            m_OffsetZ = (transform.position - target.position).z;
            transform.parent = null;
        }


        // Update is called once per frame
        private void Update()
        {
            // only update lookahead pos if accelerating or changed direction
            float xMoveDelta = (target.position - m_LastTargetPosition).x;

            bool updateLookAheadTarget = Mathf.Abs(xMoveDelta) > lookAheadMoveThreshold;

            if (updateLookAheadTarget)
            {
                m_LookAheadPos = lookAheadFactor*Vector3.right*Mathf.Sign(xMoveDelta);
            }
            else
            {
                m_LookAheadPos = Vector3.MoveTowards(m_LookAheadPos, Vector3.zero, Time.deltaTime*lookAheadReturnSpeed);
            }

            Vector3 aheadTargetPos = target.position + m_LookAheadPos + Vector3.forward*m_OffsetZ;
            Vector3 newPos = Vector3.SmoothDamp(transform.position, aheadTargetPos, ref m_CurrentVelocity, damping);
            transform.position = newPos;

            m_LastTargetPosition = target.position;
        }
    }
}

我想我可以简单地添加以下几行，但是这样做时相机会垂直飞出屏幕。这种方法有什么问题，我怎样才能让这个偏移量真正起作用？

    Vector3 newPos = Vector3.SmoothDamp(transform.position, aheadTargetPos, ref m_CurrentVelocity, damping);
    Vector3 newPos2 = new Vector3(newPos.x, newPos.y + 1, newPos.z);
    transform.position = newPos2;

Answer 1

可以通过为玩家添加一个子GameObject并将其设置到所需位置，然后将其用作相机目标来解决此问题。

此外，这样做会使职位的进一步改变更容易进行。