/// <summary>
/// This method actually does the transition. It is run in a coroutine and therefore needs to do
/// yield returns to play an animation or do another progress over time. When this method returns
/// the transition is expected to be finished.
/// </summary>
/// <returns>
/// A <see cref="IEnumerator"/> for showing the transition status. Use yield return statements to keep
/// the transition running, otherwise simply end the method to stop the transition.
/// </returns>
protected virtual IEnumerator DoTransition()
{
// make sure the transition doesn't get lost when switching the level.
DontDestroyOnLoad(gameObject);
#if !UNITY_3_5
AsyncOperation asyncOperation = null;
if (prefetchLevel)
{
state = SMTransitionState.Prefetch;
SendMessage("SMBeforeTransitionPrefetch", this, SendMessageOptions.DontRequireReceiver);
yield return(0); // wait one frame
SendMessage("SMOnTransitionPrefetch", this, SendMessageOptions.DontRequireReceiver);
var loadLevel = DoLoadLevel();
while (loadLevel.MoveNext())
{
var current = loadLevel.Current;
if (asyncOperation == null) // try to find the actual level loading operation
{
asyncOperation = current as AsyncOperation;
if (asyncOperation != null)
{
// hold on level switch until the transition is in hold state.
asyncOperation.allowSceneActivation = false;
}
}
yield return(0);
}
}
#endif
state = SMTransitionState.Out;
SendMessage("SMBeforeTransitionOut", this, SendMessageOptions.DontRequireReceiver);
Prepare();
SendMessage("SMOnTransitionOut", this, SendMessageOptions.DontRequireReceiver);
float time = 0;
while (Process(time))
{
time += DeltaTime * 2f;
// wait for the next frame
yield return(0);
}
SendMessage("SMAfterTransitionOut", this, SendMessageOptions.DontRequireReceiver);
// wait another frame...
yield return(0);
StageMgr.ExcuteBeginLoadEvent();
Resources.UnloadUnusedAssets();
state = SMTransitionState.Hold;
SendMessage("SMBeforeTransitionHold", this, SendMessageOptions.DontRequireReceiver);
SendMessage("SMOnTransitionHold", this, SendMessageOptions.DontRequireReceiver);
// wait another frame...
yield return(0);
#if !UNITY_3_5
if (!prefetchLevel)
{
#endif
// level is not prefetched, load it right now.
var loadLevel = DoLoadLevel();
while (loadLevel.MoveNext())
{
yield return(loadLevel.Current);
}
#if !UNITY_3_5
}
else
{
if (asyncOperation != null) // this should always be true, but you never know...
// level was prefetched, so activate level switch now.
{
asyncOperation.allowSceneActivation = true;
ScenePreloader.Instance.AllowEnter();
}
}
#endif
while (true)
{
if (StageMgr.Scene_name.Equals(Application.loadedLevelName))
{
break;
}
yield return(0);
}
System.GC.Collect();
StageMgr.ExcuteLoadedEvent();
SendMessage("SMAfterTransitionHold", this, SendMessageOptions.DontRequireReceiver);
// wait another frame...
yield return(0);
//LoadingScene.Instance.EnterScene(asyncOperation);
state = SMTransitionState.In;
SendMessage("SMBeforeTransitionIn", this, SendMessageOptions.DontRequireReceiver);
Prepare();
SendMessage("SMOnTransitionIn", this, SendMessageOptions.DontRequireReceiver);
time = 0;
while (Process(time))
{
time += DeltaTime;
// wait for the next frame
yield return(0);
}
SendMessage("SMAfterTransitionIn", this, SendMessageOptions.DontRequireReceiver);
// wait another frame...
yield return(0);
Destroy(gameObject);
StageMgr.ExcuteAllLoadedEvent();
}
