我想将对象/ 3D模型保持在移动屏幕的中心，即使目标丢失（跟踪丢失（））以及目标找到的最后一个跟踪图像模型应该消失。我正在使用团结。
我试图关注cloudreco样本，但不能正确。
用于我正在使用的屏幕居中：
GameObject lost = GameObject.Find ("IT"+mTrackableBehaviour.TrackableName);
lost.transform.position=Camera.main.ScreenToWorldPoint(new Vector3(Screen.width/2, Screen.height/2, Camera.main.nearClipPlane) );
我有大约10个图像目标，最大同时图像跟踪设置为1。
寻找解决方案。
谢谢！
编辑：
using UnityEngine;
using UnityEngine.UI;
using System.Collections;
using System.Collections.Generic;
namespace Vuforia
{
/// <summary>
/// A custom handler that implements the ITrackableEventHandler interface.
/// </summary>
public class dtehedit : MonoBehaviour,
ITrackableEventHandler
{
#region PRIVATE_MEMBER_VARIABLES
private TrackableBehaviour mTrackableBehaviour;
private bool firsttime=false;
//private bool secondtime=false;
GameObject lost, lostclone;
#endregion // PRIVATE_MEMBER_VARIABLES
#region UNTIY_MONOBEHAVIOUR_METHODS
void Start()
{
Debug.Log ("start method before registring");
mTrackableBehaviour = GetComponent<TrackableBehaviour>();
if (mTrackableBehaviour)
{
mTrackableBehaviour.RegisterTrackableEventHandler(this);
}
Debug.Log ("start method after registring");
}
#endregion // UNTIY_MONOBEHAVIOUR_METHODS
#region PUBLIC_METHODS
/// <summary>
/// Implementation of the ITrackableEventHandler function called when the
/// tracking state changes.
/// </summary>
public void OnTrackableStateChanged(
TrackableBehaviour.Status previousStatus,
TrackableBehaviour.Status newStatus)
{
if (newStatus == TrackableBehaviour.Status.DETECTED ||
newStatus == TrackableBehaviour.Status.TRACKED ||
newStatus == TrackableBehaviour.Status.EXTENDED_TRACKED)
{
OnTrackingFound();
}
else
{
OnTrackingLost();
}
}
#endregion // PUBLIC_METHODS
#region PRIVATE_METHODS
private void OnTrackingFound()
{
firsttime = true;
if (lostclone != null) {
Debug.Log ("LOST CLONE otf ::" + lostclone.name);
DestroyObject (lostclone); // (1) if new object is scanned gameobject lostclone is not destroyed
}
Renderer[] rendererComponents = GetComponentsInChildren<Renderer>(true);
Collider[] colliderComponents = GetComponentsInChildren<Collider>(true);
// Enable rendering:
foreach (Renderer component in rendererComponents)
{
component.enabled = true;
}
// Enable colliders:
foreach (Collider component in colliderComponents)
{
component.enabled = true;
}
Debug.Log("Trackable " + mTrackableBehaviour.TrackableName + " found");
}
private void OnTrackingLost()
{
// Debug.Log (firsttime);
// if (!firsttime) {
// Renderer[] rendererComponents = GetComponentsInChildren<Renderer> (true);
// Collider[] colliderComponents = GetComponentsInChildren<Collider> (true);
//
// // Disable rendering:
// foreach (Renderer component in rendererComponents) {
// component.enabled = false;
// }
//
// // Disable colliders:
// foreach (Collider component in colliderComponents) {
// component.enabled = false;
// }
//
// } else {
// string itname = mTrackableBehaviour.TrackableName;
// Debug.Log ("lost trackable name " + itname);
// GameObject lost = GameObject.Find ("IT" + itname);
// (2) WOrking but dont know how to reposition gameobject after next tracker is found
// lost.transform.GetChild(0).transform.position=Camera.main.ScreenToWorldPoint(new Vector3(Screen.width/2, Screen.height/2, Camera.main.nearClipPlane+20) );
// (3) workinh but dont know how to reset camera position when next tracker is found
//// Camera.main.transform.position = lost.transform.GetChild(0).transform.position + lost.transform.GetChild(0).transform.forward * 25;
//// Camera.main.transform.LookAt (lost.transform.GetChild(0).transform);
// }
Renderer[] rendererComponents = GetComponentsInChildren<Renderer> (true);
Collider[] colliderComponents = GetComponentsInChildren<Collider> (true);
// Disable rendering:
foreach (Renderer component in rendererComponents) {
component.enabled = false;
}
// Disable colliders:
foreach (Collider component in colliderComponents) {
component.enabled = false;
}
if (firsttime) {
string itname = mTrackableBehaviour.TrackableName;
Debug.Log ("lost trackable name " + itname);
lost = GameObject.Find ("IT" + itname).transform.GetChild (0).gameObject;
lostclone = Instantiate (lost) as GameObject; //decoupling
Debug.Log ("LOST CLONE ::"+lostclone.name);
}
Debug.Log("Trackable " + mTrackableBehaviour.TrackableName + " lost");
}
#endregion // PRIVATE_METHODS
}
}
对于上面的代码，我尝试了三种方法/方法，在跟踪丢失后在屏幕上显示我的3D模型，但似乎没有一个完美或按照需要工作
我通过实例化方法解耦/克隆我的3d对象但是当我再次找到跟踪器时，最后一个没有被销毁（1）以及如何让它来到相机前面
我将3dobject移动到了跟踪丢失的相机上，但是当再次跟踪发现如何将我的3d模型再次移动到原始位置时（2）
我在跟踪丢失后将相机移动到我的3dobject但是再次跟踪发现如何将相机带到原始位置（3）
请看一下代码，请帮帮我..不知道我错过了什么......？
答案 0 :(得分：0)
我看了你的代码，修了一下，我相信这可以解决你的问题。
using UnityEngine;
using UnityEngine.UI;
using System.Collections;
using System.Collections.Generic;
namespace Vuforia
{
/// <summary>
/// A custom handler that implements the ITrackableEventHandler interface.
/// </summary>
public class dtehedit : MonoBehaviour,
ITrackableEventHandler
{
#region PRIVATE_MEMBER_VARIABLES
private TrackableBehaviour mTrackableBehaviour;
private bool firsttime = false;
string itname = "";
//private bool secondtime=false;
GameObject lost, lostclone;
#endregion // PRIVATE_MEMBER_VARIABLES
#region UNTIY_MONOBEHAVIOUR_METHODS
void Start()
{
Debug.Log("start method before registring");
mTrackableBehaviour = GetComponent<TrackableBehaviour>();
if (mTrackableBehaviour)
{
mTrackableBehaviour.RegisterTrackableEventHandler(this);
}
Debug.Log("start method after registring");
}
#endregion // UNTIY_MONOBEHAVIOUR_METHODS
#region PUBLIC_METHODS
/// <summary>
/// Implementation of the ITrackableEventHandler function called when the
/// tracking state changes.
/// </summary>
public void OnTrackableStateChanged(
TrackableBehaviour.Status previousStatus,
TrackableBehaviour.Status newStatus)
{
if (newStatus == TrackableBehaviour.Status.DETECTED ||
newStatus == TrackableBehaviour.Status.TRACKED ||
newStatus == TrackableBehaviour.Status.EXTENDED_TRACKED)
{
OnTrackingFound();
}
else
{
OnTrackingLost();
}
}
#endregion // PUBLIC_METHODS
#region PRIVATE_METHODS
private void OnTrackingFound()
{
// This is wrong because you never set it to false. Every time a tracker(image) is found it will be the first time - wrong.
// firsttime = true;
if (lostclone != null)
{
Debug.Log("LOST CLONE otf ::" + lostclone.name);
// DestroyObject(lostclone); // (1) if new object is scanned gameobject lostclone is not destroyed
}
//Here you can reset the position of the GameObject back to the parent(tracker)'s position.
this.transform.GetChild(0).transform.position = new Vector3(0, 0, 0);
Renderer[] rendererComponents = GetComponentsInChildren<Renderer>(true);
Collider[] colliderComponents = GetComponentsInChildren<Collider>(true);
// Enable rendering:
foreach (Renderer component in rendererComponents)
{
component.enabled = true;
}
// Enable colliders:
foreach (Collider component in colliderComponents)
{
component.enabled = true;
}
Debug.Log("Trackable " + mTrackableBehaviour.TrackableName + " found");
}
private void OnTrackingLost()
{
Renderer[] rendererComponents = GetComponentsInChildren<Renderer>(true);
Collider[] colliderComponents = GetComponentsInChildren<Collider>(true);
// What you can do is not disable this
//foreach (Renderer component in rendererComponents)
//{
// component.enabled = false;
//}
// Disable colliders: Disable this if you need it diabled only
foreach (Collider component in colliderComponents)
{
component.enabled = false;
}
string itname = mTrackableBehaviour.TrackableName;
Debug.Log("lost trackable name " + itname);
GameObject lost = GameObject.Find("IT" + itname);
//(2) WOrking but dont know how to reposition gameobject after next tracker is found
// This is not decoupling but it should work ( you dont need to find the gameobject you can use [this] instead)
this.transform.GetChild(0).transform.position = Camera.main.ScreenToWorldPoint(new Vector3(Screen.width / 2, Screen.height / 2, Camera.main.nearClipPlane + 20));
// Disable rendering:
itname = mTrackableBehaviour.TrackableName;
Debug.Log("lost trackable name " + itname);
lost = GameObject.Find("IT" + itname).transform.GetChild(0).gameObject;
// this is not I ment by decoupling sory, I ment de parenting -> (gameObject.parent = null)
//lostclone = Instantiate(lost) as GameObject; //decoupling
}
#endregion // PRIVATE_METHODS
}
}