"PropName": "梦境楼梯",
 "AssetPath": "/Game/Props/SceneProps/Items/BP_Steps.BP_Steps",

定义场景A与场景B，A=>B。
1. 创建一个和A或者B相同的场景道具。使用LevelInstance。
2. 制作渐变效果，在A或者B溶解完成后，进行一次切换区域。     
	1. 或者使用一个其他模型做过度。
3. 物理问题可以使用 Ignore Component Transform 来解决。

manager.LayerManager.EnterLevelArea(this.preset.LevelAreaPreset.UUID, manager.LevelSwitchType);

# 角色会隐藏问题解决
1. TsIdolControllerActor.ts中绑定了若干事件
```typescript
RegisterEventListener(): void 
{
	this.ListenerWrapper_SwitchLiveArea = (liveAreaUUID: UE.Guid) => { this.SwitchToLiveArea(liveAreaUUID) }
	this.ListenerWrapper_OnFinishCreateTmpArea = (liveAreaUUID: UE.Guid) => { this.RequireSwitchToLiveArea(liveAreaUUID) }
	this.ListenerWrapper_SceneChanged =  (levelName:string)=>{this.OnSceneChanged() };
	this.ListenerWrapper_BeforeSceneChanged = (levelName:string)=>{this.BeforeSceneChanged() };
	DirectorEventSystem.RegisterEventListener(this, DirectorEvent.OnFinishSwitchLiveAreaLocal, this.ListenerWrapper_SwitchLiveArea)
	DirectorEventSystem.RegisterEventListener(this, DirectorEvent.OnFinishSwitchSubLevelLocal,this.ListenerWrapper_SceneChanged)
	DirectorEventSystem.RegisterEventListener(this, DirectorEvent.BeforeSwitchLevel,this.ListenerWrapper_BeforeSceneChanged)
	DirectorEventSystem.RegisterEventListener(this, DirectorEvent.OnFinishCreateTmpLiveAreaLocal,this.ListenerWrapper_OnFinishCreateTmpArea)
}
```

- ListenerWrapper_SwitchLiveArea：角色移动到其他LiveArea的核心逻辑。
- ListenerWrapper_OnFinishCreateTmpArea：无逻辑。
- ListenerWrapper_SceneChanged：卸载所有道具？this.PropComp.OnSceneChanged()
- ListenerWrapper_BeforeSceneChanged：将角色与衣服从LiveAreaDetach? this.DressModel.K2_DetachFromActor()

## ListenerWrapper_SwitchLiveArea
```c++
    SwitchToLiveArea(TargetLiveAreaGUID: UE.Guid): void {
        console.warn(this.Identity.RootTag.TagName.toString() + ' switch to live area ' + TargetLiveAreaGUID.ToString())
        this.LiveAreaGIUD = TargetLiveAreaGUID
        this.SetTransformToLiveArea()
        if (this.PropComp.DressModel && this.PropComp.DressModel.MovementComp&&this.PropComp.DressModel.MovementComp.ManulMovement) {
            console.warn(this.PropComp.DressModel.GetName() + ' is in free move mode, will not teleport to new area!')
            return
        }
        var liveAreaMgr = LiveAreaUtils.GetLievAreaManagerInstance(this)
        if (liveAreaMgr && liveAreaMgr.IsTmpLiveArea(TargetLiveAreaGUID)) {
            // teleport to the target live area without fx
            this.PropComp.Teleport(TargetLiveAreaGUID)
        } else {
            this.PropComp.DressModelTeleport(TargetLiveAreaGUID)
        }
    }
```

## 相关事件
- BeforeSwitchArea_Multicast 

## 笔记
- SwitchToLiveArea()
	- 设置Idol的位置。
	- this.OnSwitchLiveArea.Broadcast(oriUUID, uuid);
        - DirectorEventSystem.Emit(this, DirectorEvent.OnFinishSwitchLiveAreaLocal, this.CurrentLiveAreaUUID)                           TsDirectorCamManagerActor.ts
	        - console.log('切换直播区域,area=[' + (liveArea as UE.LiveAreaActor).Title + ']')
	        - DirectorCamUtil.EnsureWorkShopReady(this, placement.UUID, () => { this.SwitchWorkShopInAreaServer(0) })           ***TsDirectorCamManagerActor.ts***
		        - SwitchWorkShopInAreaServer
		        - this.HandlePreviewTaskDataMulticast(newPreviewTaskData);
		        - this.RequestPVWTaskServer(newPVWTaskData);


```ts
    //推流
    E_StartCut(progress: number): void {
        this.camManagerCache = DirectorCamUtil.PushStreamOnServerAsync(this, UE.EPushStreamMethod.Cut, false, this.camManagerCache)
    }

	function PushStreamOnServerAsync(context:UE.Object, method:UE.EPushStreamMethod,bForce:boolean, camManagerCache? : TsDirectorCamManagerActor):TsDirectorCamManagerActor{
        let camManager = GetCamManager(context, camManagerCache)
        if(camManager){
            camManager.PushStreamOnServerAsync(method, bForce)
        }
        return camManager
    }
    
    // Server端判断是否可以推流。（存在网络延迟�?
    @ufunction.ufunction(ufunction.Reliable, ufunction.ServerAPI)
    PushStreamOnServerAsync(method:UE.EPushStreamMethod, bForce : boolean):void{
        let newPGMTaskData = DirectorCamUtil.CopyTaskData(this.prestreamTaskData)
        this.RequestPGMTaskServer(newPGMTaskData, method, bForce)
    }
```

## TsMovableLiveAreaComponent
- TsMovableLiveAreaComponent
## 
```ts
    /** 使用cmd进入区域，跳过加载等待， 其他方法不可调用 */
    @ufunction.ufunction(ufunction.ServerAPI, ufunction.Reliable)
    EnterAreaByCMD(areaUUIDStr: string): void {

        let areaManager = this.GetLevelAreaManager();
        if (!areaManager) {
            return;
        }

        let area: UE.LiveAreaActor = null;
        if (areaUUIDStr != null || areaUUIDStr != "") {
            let uuid = new UE.Guid();
            if (UE.Guid.Parse(areaUUIDStr, $ref(uuid))) {
                area = areaManager.GetLiveArea(uuid);
            }
        }

        if (area == null) {
            area = areaManager.GetAllLiveAreas().GetRef(0)
        }

        if (area == null) {
            console.error("no area")
            return
        }

        if (area.UUID.op_Equality(areaManager.CurrentLiveAreaUUID)) {
            return
        }

        let bHasData = false;
        let presetId:UE.Guid;
        let manager = this.GetManager()
        for (let index = 0; index < manager.Config.AreaPresets.Num(); index++) {
            const element = manager.Config.AreaPresets.GetRef(index);
            if (element.AreaGuid.op_Equality(area.UUID)) {
                presetId = element.UUID;
                bHasData = true;
                break;
            }
        }

        let levelName = UE.GameplayStatics.GetCurrentLevelName(this, true);

        if (!bHasData) {
            manager.AddAreaPreset( levelName, area.UUID, area.Title)

            for (let index = 0; index < manager.Config.AreaPresets.Num(); index++) {
                const element = manager.Config.AreaPresets.GetRef(index);
                if (element.AreaGuid.op_Equality(area.UUID)) {
                    presetId = element.UUID;
                    break;
                }
            }
        }

        let viewTarget = areaManager.GetViewTarget(area.UUID)
        if (!viewTarget) {
            this.AddViewTarget(area.UUID, area.Title);
        }


        manager.AddConfigLevelSetting(levelName);
        this.BeforeSwitchArea_Multicast(manager.CurPresetId);

        manager.CurPresetId = presetId;
        areaManager.SwitchToLiveArea(area.UUID);
    }
}
```