Understanding the base scripts

The interactive Object class is the base script that enables a player in our game to have meaningful gameplay interactions. To meet the design needs of our game, this script provides an interface with which the game designer can specify how the player will interact with an object as it is picked up. In addition to this, it also permits subtle rotation on the object for a nice effect. The CustomGameObj and ObjectInteraction helper classes are used by the object class to define the specific nature of the interactions and how the object behaves in the inventory when collected.

The MissionMgr class is the system that tracks the user's progress through the game and rewards him or her on achieving success. When a user interacts with an interactive object, MissionToken attached to it (if any) is collected and tracked by MissionMgr. The MissionMgr class has a template of all missions, the tokens that each mission is composed of, and the reward that should be given when a mission is satisfied. When the MissionMgr class determines that a mission is complete and that all of the tokens from that mission have been collected, it gives a reward to the user.

Lastly, InventoryMgr is the system that handles the display of the interactive objects that have been collected. If an object is permitted to be collected, it will be added to the inventory according to its CustomGameObj and then displayed in the inventory at the bottom of the screen.

The following list outlines the classes that we will develop in this chapter:

The CustomGameObj and InteractiveObj systems will interact with one another because our game's collecting mechanism is based on how the user primarily acquires and interacts with mission objectives. Once we have this core mechanism coded, with a couple of simple collection missions, we will illustrate how it works: