VR游乐园学习（2）—游乐设备选择场景

（一）基础设置

拖入资源库中的“银河”材质球，设置放大参数，使相机包裹其中；

设置Canvas分辨率为1920*1080，RenderMode选为世界空间；调整位置，视图以下所示。

 

 （二）场景选择设置须要设置一个面片，position（0,0，-2000），设置一个空物体（0,0,0），将面片做为空物体的子物体。将GameItem做为预制体，使用代码自动生成。

在游戏运行时，在GameItemSpan下生成GameItem，定义一个Material[]，每次选择旋转的角度private float m_Angle;

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using DG.Tweening;

public class GameItemSelect : MonoBehaviour
{
    public static GameItemSelect _Instance;

    public Material[] m_gameItemMatArr;
    public GameObject go_GameItem;
    private float m_Angle;
    public int Index = 0;


    private void Awake()
    {
        _Instance = this;
        m_Angle = 360.0f / m_gameItemMatArr.Length;
        for (int i = 0; i < m_gameItemMatArr.Length; i++)
        {
            GameObject go = Instantiate(go_GameItem, transform);
            go.transform.localEulerAngles = new Vector3(0, i * m_Angle, 0);
            go.GetComponentInChildren<MeshRenderer>().material = m_gameItemMatArr[i];
            go.GetComponentInChildren<GameItem>().SetVideoName(m_gameItemMatArr[i].name);
            go.GetComponentInChildren<GameItem>().Index = i;
        }

    }

    public void RotateForWord()
    {
        Index++;
        if (Index >= m_gameItemMatArr.Length)
        {
            Index = 0;
        }
        transform.DORotate(new Vector3(0, -Index * m_Angle, 0), 0.3f);
    }
    public void RotateBack()
    {
        Index--;
        if (Index < 0)
        {
            Index = m_gameItemMatArr.Length - 1;
        }
        transform.DORotate(new Vector3(0, -Index * m_Angle, 0), 0.3f);
    }
}

（三）使用DOTwing实现游乐项目切换

transform.DORotate(new Vector3(0, -Index * m_Angle, 0), 0.3f);

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

public class GameItemPanel : MonoBehaviour {

    private Button btn_Forword;
    private Button btn_Back;
    private Button btn_Select;
    private Text txt_Title;
    private string[] m_GameItemNameArr; 

    private void Awake()
    {
        ReadGameItemNameText();
        Init();
    }
    private void Update()
    {
        txt_Title.text = m_GameItemNameArr[GameItemSelect._Instance.Index];
    }


    private void ReadGameItemNameText()
    {
        TextAsset textAsset= Resources.Load < TextAsset >( "游乐项目名字");
        m_GameItemNameArr = textAsset.text.Split('\n');
    }

    private void Init()
    {
        txt_Title = transform.Find("txt_Title").GetComponent<Text>();
        btn_Forword = transform.Find("btn_forward").GetComponent<Button>();
        btn_Forword.onClick.AddListener(() =>
        {
            GameItemSelect._Instance.RotateForWord();
        });

        btn_Back = transform.Find("btn_back").GetComponent<Button>();
        btn_Back.onClick.AddListener(() =>
        {
            GameItemSelect._Instance.RotateBack();
        });
        btn_Select = transform.Find("btn_select").GetComponent<Button>();
        btn_Select.onClick.AddListener(() =>
        {
            LoadingPanel._instance.LoadScene();
        });
    }

}

 （4）项目名称的展现

 新建”游乐项目”文档，顺序与材质球的顺序一致。文档的编码为“UTF_8”，文件放在Resous文件夹中

private void ReadGameItemNameText()
    {
        TextAsset textAsset= Resources.Load < TextAsset >( "游乐项目名字"); m_GameItemNameArr = textAsset.text.Split('\n'); }

TextAsset为文本资源，Split（）方法为切割；