VR 獲取EyeController的關注事件

1. 創建一個LookPoint指示點

LookPoint配置信息

Image配置信息

調整Image的Rotation Z 爲-180度, 爲了接下來的進度條 符合大家所熟悉的順時針慢慢填滿.

這裏需要先創建一個 Sprite, 稱之爲lookPoint, 也就是EyeController的焦點位置

這裏Material 使用的shader如下,目的是爲了讓這個指示點始終顯示, 即使被物體遮擋.

創建好LookPoint之後, 運行,你會發現視線中心有一個圓圈指示點, 調整Panel的 scale ,讓圓圈顯示到合適大小, 接下來在代碼裏處理EyeController的關注事件

2 獲取EyeController的關注事件

using UnityEngine;
using System.Collections;
using UnityEngine.UI;

public class EyeController : MonoBehaviour {

    public GameObject cameraRig;

    public GameObject image;


    public Sprite initSprite;
    public Sprite watchingSprite;
    // Use this for initialization
    private Image img;

    private bool isWatching;

    private string lastObjName;
    private GameObject lastWatchedObj;

    public delegate void WatchingObjectDelegate();
    public static event WatchingObjectDelegate watchingObject;

    void Start () {
         img = image.GetComponent<Image>();
    }

    // Update is called once per frame
    void Update()
    {

        //射線
        Ray ray = new Ray(this.transform.position, transform.forward );

        RaycastHit hit;//存儲發射射線後產生的碰撞信息hit.point /hit.distance /hit.collider
        //發生碰撞
        if (Physics.Raycast(ray, out hit, Mathf.Infinity))
        {
            WatchableObject obj = hit.collider.gameObject.GetComponent<WatchableObject>();
            if (obj && obj.enabled == true)//有WatchableObject組件的物體,並且組件有效
            {

                if(lastObjName == obj.name)//爲同一個物體
                {
                    img.sprite = watchingSprite;
                    if (!isWatching)//第一次進入視野
                    {
                        if (obj.gameObject.GetComponent<TeleportPointObject>() == null)//如果不是TeleportPoint
                        {
                            cloneObject(obj);
                        }


                        img.fillAmount = 0f;
                        isWatching = true;
                    }
                    else
                    {
                        if (img.fillAmount < 1f)
                        {
                            img.fillAmount += 0.00833333333f;
                        }
                        else
                        {
                            destroyCloneObj();
                            //注視時間1.5s後
                            if (obj.gameObject.GetComponent<TeleportPointObject>() != null)//如果是TeleportPoint
                            {
                                //cameraRig.transform.position = obj.transform.position;
                                Vector3 vec = transform.position - cameraRig.transform.position; //先計算偏移量
                                Vector3 newPos = obj.transform.position;//獲取新的position
                                newPos.y = transform.position.y;//Eye的Y值並不改變
                                transform.position = newPos;//設置Eye的新position
                                cameraRig.transform.position = transform.position - vec;//調整cameraRig的position,防止定位重新改變Eye的位置

                            }

                            if (EyeController.watchingObject == null)
                            {
                                EyeController.watchingObject += obj.WatchingObjectDelegate;
                            }

                            watchingObject();


                        }

                    }
                }else
                {
                    lastObjName = obj.name;
                    initImage();
                    destroyCloneObj();
                    if(EyeController.watchingObject != null)
                    {
                        EyeController.watchingObject -= obj.WatchingObjectDelegate;
                    }

                }
            }else//爲其他Collider ,但是沒有WatchableObject組件
            {
                initImage();
                destroyCloneObj();
                EyeController.watchingObject = null;
            }

        }else//沒有碰撞
        {
            initImage();
            destroyCloneObj();
            EyeController.watchingObject = null;
        }
    }
    //還原image爲初始狀態
    private void initImage()
    {
        if (img.type == Image.Type.Filled)
        {
            img.fillAmount = 1f;
            img.sprite = initSprite;
        }
        isWatching = false;
    }

    //克隆物體 
    private void cloneObject(WatchableObject collidedItem)
    {
        GameObject cloneObj = Object.Instantiate(collidedItem.transform.gameObject, collidedItem.transform.position, collidedItem.transform.rotation) as GameObject;
        if (collidedItem.transform.parent)
        {
            cloneObj.transform.SetParent(collidedItem.transform.parent);
            cloneObj.transform.localScale = collidedItem.transform.localScale;
        }
        foreach (Component comp in cloneObj.GetComponents<Component>())
        {
            if (!(comp is Transform) && !(comp is Renderer))
            {
                Destroy(comp);
            }
        }
        Shader shader = Shader.Find("Valve/VR/Silhouette");

        Material material = new Material(shader);
        material.name = "silhouette";
        material.SetColor("g_vOutlineColor", Color.green);
        cloneObj.GetComponent<Renderer>().material = material;

        lastWatchedObj = cloneObj;
    }

    //銷燬克隆的物體
    private void destroyCloneObj()
    {
        if (lastWatchedObj)
        {
            Destroy(lastWatchedObj);
        }
    }

}