在Unity增强现实中显示屏幕UI按钮

1 回答

• 2

  找到可跟踪的“ImageTarget”时，您需要显示按钮 . 即按钮应该在可追踪事件上弹出 .

  • 如果您在统一中创建这样简单的UI，无论您将其放置在层次结构中 . 无论标记检测如何，它都将始终显示 .

  • 您首先需要使用Vuforia提供的方法知道是否检测到标记，然后必须语法创建按钮 .

  • 为此，您必须了解如何跟踪可跟踪事件，例如可跟踪发现或可跟踪丢失 . Vuforia通过提供名为DefaultTrackableEventHandler的模板脚本为我们提供了便利 .

  • 此脚本默认附加到任何ImageTarget预制件 . 您可以使用此脚本或类似脚本，如下所示 .

  if（newStatus == TrackableBehaviour.Status.DETECTED || newStatus == TrackableBehaviour.Status.TRACKED || newStatus == TrackableBehaviour.Status.EXTENDED_TRACKED）

  你必须编写C＃脚本并将其附加到 "ImageTarget"

  下面的脚本描述了如何使用Vuforia SDK的thre Unity扩展显示（弹出）覆盖在3D视图顶部以响应目标检测事件的GUI按钮 .

  Here is the Script

  using UnityEngine;
  using System.Collections;
  using Vuforia;
  using System;
  
  public class ButtonPopup : MonoBehaviour, ITrackableEventHandler {
  
      float native_width= 1920f;
      float native_height= 1080f;
      public Texture btntexture;
      public Texture LogoTexture;
      public Texture MobiliyaTexture;
  
  
      private TrackableBehaviour mTrackableBehaviour;
  
      private bool mShowGUIButton = false;
  
  
      void Start () {
  
  
          mTrackableBehaviour = GetComponent<TrackableBehaviour>();
          if (mTrackableBehaviour) {
              mTrackableBehaviour.RegisterTrackableEventHandler(this);
          }
      }
  
      public void OnTrackableStateChanged(
          TrackableBehaviour.Status previousStatus,
          TrackableBehaviour.Status newStatus)
      {
          if (newStatus == TrackableBehaviour.Status.DETECTED ||
              newStatus == TrackableBehaviour.Status.TRACKED ||
              newStatus == TrackableBehaviour.Status.EXTENDED_TRACKED)
          {
              mShowGUIButton = true;
          }
          else
          {
              mShowGUIButton = false;
          }
      }
  
      void OnGUI() {
  
          //set up scaling
          float rx = Screen.width / native_width;
          float ry = Screen.height / native_height;
  
          GUI.matrix = Matrix4x4.TRS (new Vector3(0, 0, 0), Quaternion.identity, new Vector3 (rx, ry, 1));
  
          Rect mButtonRect = new Rect(1920-215,5,210,110);
          GUIStyle myTextStyle = new GUIStyle(GUI.skin.textField);
          myTextStyle.fontSize = 50;
          myTextStyle.richText=true;
  
          GUI.DrawTexture(new Rect(5,1080- 115,350,110),LogoTexture); 
          GUI.DrawTexture (new Rect (1530, 970, 350, 110), MobiliyaTexture);
  
  
          if (!btntexture) // This is the button that triggers AR and UI camera On/Off
          {
              Debug.LogError("Please assign a texture on the inspector");
              return;
          }
  
          if (mShowGUIButton) {
  
              GUI.Label(new Rect(40, 25, 350, 70), "<b> G E  9 1 0 0 C </b>",myTextStyle);
  
              //GUI.Box (new Rect (0,0,100,50), "Top-left");
              //GUI.Box (new Rect (1920 - 100,0,100,50), "Top-right");
              //GUI.Box (new Rect (0,1080- 50,100,50), "Bottom-left");
              //GUI.Box (new Rect (Screen.width - 100,Screen.height - 50,100,50), "Bottom right");
  
              // draw the GUI button
              if (GUI.Button(mButtonRect, btntexture)) {
                  // do something on button click 
                  OpenVideoActivity();
              }
          }
      }
  
      public void OpenVideoActivity()
      {
          var androidJC = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
          var jo = androidJC.GetStatic<AndroidJavaObject>("currentActivity");
          // Accessing the class to call a static method on it
          var jc = new AndroidJavaClass("com.mobiliya.gepoc.StartVideoActivity");
          // Calling a Call method to which the current activity is passed
          jc.CallStatic("Call", jo);
      }
  
  }
  

  回复于 2024-04-27T20:28:06+08:00