# 4.Managers

There are two main classes in the project responsible for **managing** the setup for the game including **movement speeds**, **player lives**, **scoring rules** and more.

The first class is the **LevelManager** which is responsible for exposing many of the important in **game variables** to the **editor**. However, it doesn’t manage the game during runtime, it provides the exposed variables to the **GameMode** class that acts as a kind of GameManager class.

**Level Manager Roles:**

* **Spawner Class Management** - When the game first runs the **LevelManager** will search for any class of type **Spawner**. It will then make **Interface** calls to begin the spawning logic and timers.
* **Bounds** - An in editor category to control the **Out of Bounds** collision wall details and the **location** for **Disabled Pooled objects** to be placed out of view ready for reuse.
* **Game Type Settings** - Providing access specific **GameType** settings, utilised mostly to demonstrate the multiple demos for the plugin. The important values here are the **GameTypeStartText** and **GameTypeLives**. These are used by the **GameMode** class to provide a message to the game widget when the game starts with a start message and also set the **maximum** number of **lives** the player will get during play.
* **Float times** - **CountDownTime** and **RespawnDelay** are both exposed for the editor here and used in the **GameMode** class during play to control how long the initial **intro countdown** into the level is and the **time between respawning** if player **lives** are available.
* **Level Speeds** - **InitialSpeed**, **MaxSpeed**, **SpeedAcceleration** and the **LevelMovementDirection** are exposed for the editor and used mainly by the **BP\_SpawnableBase** class and derived classes of that. They will check the speed variables and movement direction over time using interface getter functions from the **LevelManager** class to control the scrolling movement.

The second class used for game management is the **BP\_GameModeBase** which handles many of the in game management of things like **score**, **remaining lives** and **currency**.

Rather than creating a separate Game Manager class the project makes use of the built in Game Mode class type which every game needs as part of the basic engine requirements. This does mean that the GameMode you select will need to be the **BP\_GameModeBase** class found in the **Common** folder, or a child of that class.

**Game Mode Base Roles:**

* **Initialisation** - This will reset the **score**, check for a game to **load** and update the player collected **currency** if there was something to load.
* **Game Variables** - When the game starts, the GameMode will grab relevant information from the **LevelManager** from the exposed variables such as the **player lives** which will then be tracked and updated through the GameMode during play when the player dies.
* **Spawning/Respawning** - The GameMode classes are responsible for **spawning** the **player** by default in Unreal and this is extended to also handle **respawning** a **player** class of a certain type when the **player dies** and **remaining lives** are available.
* **Game Flow** - Handles the **start** and **end** of the game state as well as allowing for the game to **pause** and **resume**.
* **Save/Load** - As well as **loading** the game when the game starts it will also **save** the game when the application ends play for any reason using “**EventEndPlay**”