Method isSceneActive

packages/core/src/ECS/World.ts:288–290

* 检查Scene是否激活

(sceneName: string)

     * 检查Scene是否激活
     */
    public isSceneActive(sceneName: string): boolean {
        return this._activeScenes.has(sceneName);
    }

    /**
     * 获取活跃Scene数量