VRTK3.3.0-003發出一條簡單射線和監聽

1丶在Right下繼續添加腳本VRTK_Pointer和VRTK_StraightPointerRenderer

運行后默認是按住圓盤鍵出現射線，松開消失，大家可以自定義

2丶射線的監聽事件

（1）在場景中創建一個Cube用來觸發射線檢測用，位於相機前方([VRTK_SDKManager]的Z軸方向)

（2）在Right上新建腳本SimplePointerEvents，通過得到VRTK_DestinationMarker組件注冊方法，就可以監聽射線的觸發了

　　注意：VRTK_Pointer組件是繼承於VRTK_DestinationMarker組件

using UnityEngine;
using VRTK;//   引用VRTK命名空間

    public class SimplePointerEvents : MonoBehaviour
    {
    private VRTK_DestinationMarker destinationMarker;
    private void Awake()
    {
        destinationMarker = GetComponent<VRTK_DestinationMarker>();
        destinationMarker.DestinationMarkerEnter += DestinationMarker_DestinationMarkerEnter;
        destinationMarker.DestinationMarkerExit += DestinationMarker_DestinationMarkerExit;
        destinationMarker.DestinationMarkerHover += DestinationMarker_DestinationMarkerHover;
        destinationMarker.DestinationMarkerSet += DestinationMarker_DestinationMarkerSet;
    }

    private void DestinationMarker_DestinationMarkerSet(object sender, DestinationMarkerEventArgs e)
    {
        Debug.Log("與物體交互");
    }
    private void DestinationMarker_DestinationMarkerHover(object sender, DestinationMarkerEventArgs e)
    {
        Debug.Log("射線懸停物體");
    }
    private void DestinationMarker_DestinationMarkerExit(object sender, DestinationMarkerEventArgs e)
    {
        Debug.Log("射線退出物體");
    }

    private void DestinationMarker_DestinationMarkerEnter(object sender, DestinationMarkerEventArgs e)
    {
        Debug.Log("射線進入物體");
    }
}