这两个指针是什么意思？ [关闭]

Question

港铁 2.7.3 对象操纵器.cs pointerIdToPointerMap.Add(id, new PointerData(eventData.Pointer, eventData.Pointer.Result.Details.Point)); 这两个指针是什么意思？ 1、eventData.Pointer 2、eventData.Pointer.Result.Details.Point

enter code here

    public void OnPointerDown(MixedRealityPointerEventData eventData)
    {
        if (eventData.used ||
                (!allowFarManipulation && eventData.Pointer as IMixedRealityNearPointer == null))
        {
            return;
        }

        // If we only allow one handed manipulations, check there is no hand interacting yet.
        if (manipulationType != ManipulationHandFlags.OneHanded || pointerIdToPointerMap.Count == 0)
        {
            uint id = eventData.Pointer.PointerId;
            // Ignore poke pointer events
            if (!pointerIdToPointerMap.ContainsKey(id))
            {
                // cache start ptr grab point
                pointerIdToPointerMap.Add(id, new PointerData(eventData.Pointer, eventData.Pointer.Result.Details.Point));

                // Re-initialize elastic systems.
                if (elasticsManager)
                {
                    elasticsManager.InitializeElastics(HostTransform);
                }

                // Call manipulation started handlers
                if (IsTwoHandedManipulationEnabled)
                {
                    if (!isManipulationStarted)
                    {
                        HandleManipulationStarted();
                    }
                    HandleTwoHandManipulationStarted();
                }
                else if (IsOneHandedManipulationEnabled)
                {
                    if (!isManipulationStarted)
                    {
                        HandleManipulationStarted();
                    }
                    HandleOneHandMoveStarted();
                }
            }
        }

        if (pointerIdToPointerMap.Count > 0)
        {
            // Always mark the pointer data as used to prevent any other behavior to handle pointer events
            // as long as the ObjectManipulator is active.
            // This is due to us reacting to both "Select" and "Grip" events.
            eventData.Use();
        }
    }

enter code here
   private struct PointerData
    {
        public IMixedRealityPointer pointer;
        private Vector3 initialGrabPointInPointer;

        public PointerData(IMixedRealityPointer pointer, Vector3 worldGrabPoint) : this()
        {
            this.pointer = pointer;
            this.initialGrabPointInPointer = Quaternion.Inverse(pointer.Rotation) * (worldGrabPoint - pointer.Position);
        }

        public bool IsNearPointer => pointer is IMixedRealityNearPointer;

        /// Returns the grab point on the manipulated object in world space
        public Vector3 GrabPoint => (pointer.Rotation * initialGrabPointInPointer) + pointer.Position;
    }

我很想知道答案