场景切换的淡入淡出
两个场景需要跳转，如果直接跳过去，那么就会显得很生硬，使用一个过渡，就会使整体切换显得很自然。
using UnityEngine;
using System.Collections;
/*
* 使用方法：将该脚本附在镜头下面，然后切换场景时镜头不销毁
* 要调用的时候获得该脚本，然后调用StartSplash（）
*/
public class SceneLoad : MonoBehaviour {
public int guiDepth = 0;
// private string levelToLoad = "";
//将要加载的场景序号
public int levelToLoadInt;
//切换场景的纹理
public Texture2D splashLogo;
//淡入淡出的速度
float fadeSpeed = 0.8f;
//保持纹理最高透明度的时间
float waitTime = 0f;
//是否要等待输入
public bool waitForInput = false;
//public bool startAutomatically = false;
public bool IsDealPlayer=false;
private float timeFadingInFinished = 0.0f;
//处理切换场景后需要实现的事件
public delegate void EventHandler();
public event EventHandler trigger;
public delegate void EventHandler2nd();
public event EventHandler2nd triggerAtLoading;
//淡入淡出方式
public enum SplashType
{
LoadNextLevelThenFadeOut,
FadeOutThenLoadNextLevel
}
public SplashType splashType;
private float alpha = 0.0f;
//纹理的状态
private enum FadeStatus
{
Paused,
FadeIn,
FadeWaiting,
FadeOut
}
private FadeStatus status = FadeStatus.Paused;
private Rect splashLogoPos = new Rect();
//是否要自适应屏幕大小
public enum LogoPositioning
{
Centered,
Stretched
}
public LogoPositioning logoPositioning;
// private bool loadingNextLevel = false;
void Start ()
{ if(logoPositioning == LogoPositioning.Centered)
{
splashLogoPos.x = (Screen.width * 0.5f) - (splashLogo.width * 0.5f);
splashLogoPos.y = (Screen.height * 0.5f) - (splashLogo.height * 0.5f);
splashLogoPos.width = splashLogo.width;
splashLogoPos.height = splashLogo.height;
}
else
{
splashLogoPos.x = 0;
splashLogoPos.y = 0;
splashLogoPos.width = Screen.width;
splashLogoPos.height = Screen.height;
}
if(splashType == SplashType.LoadNextLevelThenFadeOut)
{
DontDestroyOnLoad(this);
}
if(Application.levelCount <= 1)
{
Debug.LogWarning("Invalid levelToLoad value.");
}
}
//开始切换，要跳转的场景和设置对应的切换速率
public void StartSplash (int level,int i)
{
status = FadeStatus.FadeIn;
levelToLoadInt=level;
SetValue(i);
}
public void setIsDealPlayer(bool isDealPlayer)
{
IsDealPlayer=isDealPlayer;
}
public void SetValue(int i)
{
switch(i)
{
case 1:
fadeSpeed=1f;
waitTime=0.5f;
break;
case 2:
fadeSpeed=1.5f;
waitTime=0.8f;
break;
case 3:
fadeSpeed=2.5f;
waitTime=0.5f;
break;
}
}
void Update ()
{
switch(status)
{
case FadeStatus.FadeIn:
alpha += fadeSpeed*Time.deltaTime;
break;
case FadeStatus.FadeWaiting:
if((!waitForInput && Time.time >= timeFadingInFinished + waitTime)||(waitForInput && Input.anyKey))
{
status = FadeStatus.FadeOut;
}
break;
case FadeStatus.FadeOut:
alpha += -fadeSpeed*Time.deltaTime*2;
if(alpha<=0.0f)
{
if(trigger!=null){
trigger();
}
status=FadeStatus.Paused;
}
break;
}
}
void OnGUI()
{
GUI.depth = guiDepth;
if(splashLogo != null)
{
GUI.color = new Color(GUI.color.r,GUI.color.g,GUI.color.b,Mathf.Clamp01(alpha));
GUI.DrawTexture(splashLogoPos,splashLogo);
}
if(alpha > 1.0f)
{
status = FadeStatus.FadeWaiting;
timeFadingInFinished = Time.time;
alpha = 1.0f;
if(splashType == SplashType.LoadNextLevelThenFadeOut)
{
//loadingNextLevel = true;
if((Application.levelCount) >= 1)
{
// print(levelToLoadInt);
Application.LoadLevel(levelToLoadInt);
if(triggerAtLoading!=null)
triggerAtLoading();
}
}
}
if(alpha < 0.0f)
{
if(splashType == SplashType.FadeOutThenLoadNextLevel)
{
if(Application.levelCount >= 1)
{
Application.LoadLevel(levelToLoadInt);
}
}
else
{
}
}
}
}
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