通过方向计算四元数旋转

        // 已知方向,求物体的旋转
        public static Quaternion GetRotation(Vector3 knownDirection)
        {
            knownDirection.Normalize();
            // Unity中的世界坐标系中，正前方通常为Vector3.forward (0, 0, 1)
            Vector3 forward = Vector3.forward;

            // 计算旋转轴（叉乘结果）和旋转角度（通过点乘）
            Vector3 rotationAxis = Vector3.Cross(forward, knownDirection).normalized;
            float angle = Mathf.Acos(Vector3.Dot(forward, knownDirection) / (forward.magnitude * knownDirection.magnitude));

            // 将轴角转换为四元数
            Quaternion rotation = Quaternion.AngleAxis(angle * Mathf.Rad2Deg, rotationAxis);

            // 输出四元数
            //Debug.Log("Calculated Quaternion Rotation: " + rotation);

            return rotation;
        }