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添加啟動游戲過渡場景Default Splash Scene（Unity3D開發之十三）

來源：程序員人生發布時間：2015-04-09 08:48:56 閱讀次數：4092次

添加啟動游戲過渡場景Default Splash Scene（Unity3D開發之103）

猴子原創，歡迎轉載。轉載請注明：轉載自Cocos2Der-CSDN，謝謝！

原文地址: http://blog.csdn.net/cocos2der/article/details/44099095

Unity5個人版會添加Unity Logo作為啟動畫面，我們既然沒花錢，打個廣告也應當。但Unity Logo結束后可以再添加1個自己的啟動畫面。

下面是添加1個簡單的FadeIn->FadeOut過渡場景。

先看下效果圖：
Unity啟動過渡場景

代碼以下 LHSplashScreens.cs：

using UnityEngine;
using System.Collections;

public enum FadeStatus
{
    FadeIn,
    FadeWaiting,
    FadeOut
}

public class LHSplashScreens : MonoBehaviour 
{
    public string levelToLoad;
    public bool waitForInput;
    public float timeFadingInFinished;
    public Sprite splashSprite;

    private float m_fadeSpeed;
    private float m_waitTime;
    private float m_alpha;
    private FadeStatus m_status;
    private SpriteRenderer m_splashSpriteRenderer;

    public LHSplashScreens()
    {
        levelToLoad = "";
        m_fadeSpeed = 0.3f;
        m_waitTime = 0.5f;
        m_status = FadeStatus.FadeIn;
    }

    void Awake()
    {
        Application.targetFrameRate = 60;
    }

    // Use this for initialization
    void Start () 
    {
        if (Application.levelCount <= 1 || levelToLoad == "")
        {
            Debug.LogWarning("Invalid levelToLoad value.");
        }

        GameObject m_splashSpriteGO = new GameObject("SplashSprite");
        m_splashSpriteGO.AddComponent<SpriteRenderer>();
        m_splashSpriteRenderer = m_splashSpriteGO.GetComponent<SpriteRenderer>();
        m_splashSpriteRenderer.sprite = splashSprite;

        Transform m_splashSpriteTransform = m_splashSpriteGO.gameObject.transform;
        m_splashSpriteTransform.position = new Vector2(0f, 0f);
        m_splashSpriteTransform.parent = this.transform;
    }

    // Update is called once per frame
    void Update () 
    {
        FadeStatus fadeStatus = m_status;
        if (fadeStatus == FadeStatus.FadeIn)
        {
            m_alpha += m_fadeSpeed * Time.deltaTime;
        }
        else if (fadeStatus == FadeStatus.FadeWaiting)
        {
            if ((!waitForInput && Time.time >= timeFadingInFinished + m_waitTime) || (waitForInput && Input.anyKey))
            {
                m_status = FadeStatus.FadeOut;
            }
        }
        else if (fadeStatus == FadeStatus.FadeOut)
        {
            m_alpha -= m_fadeSpeed * Time.deltaTime;
        }

        UpdateSplashAlpha();
    }

    private void UpdateSplashAlpha()
    {
        if (m_splashSpriteRenderer != null)
        {
            Color spriteColor = m_splashSpriteRenderer.material.color;
            spriteColor.a = m_alpha;
            m_splashSpriteRenderer.material.color = spriteColor;

            if (m_alpha > 1f)
            {
                m_status = FadeStatus.FadeWaiting;
                timeFadingInFinished = Time.time;
                m_alpha = 1f;
            }

            if (m_alpha < 0)
            {
                if (Application.levelCount >= 1 && levelToLoad != "")
                {
                    Application.LoadLevel(levelToLoad);
                }
            }
        }
    }
}