Unity Artificial Intelligence Programming
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The player's tank

Before writing the script for our player's tank, let's take a look at how we set up the PlayerTank game object. Our Tank object is a simple Mesh with the Rigidbody and Box Collider components. The Tank object is composed of two separate meshes, Tank and Turret, such that Turret is a child of Tank. This structure allows for the independent rotation of the Turret object using the mouse movement and, at the same time, will follow automatically the Tank body wherever it goes. Then, we create an empty game object for our SpawnPoint transform. We use it as a reference position point when shooting a bullet. Finally, for the player's Tank, we need to assign the Player tag to our Tank object. Now let's take a look at the controller class:

Our tank entity

The player's Tank is controlled by the PlayerTankController class. We are using the W, A, S, and D keys to move and steer the tank, and the left mouse button to aim and shoot from the Turret object.

In this book, we assume the use of a QWERTY keyboard, as well as the use of a two-button mouse, with the left mouse button set to the primary mouse button. For those readers who use a different keyboard, all you have to do is pretend that you are using a QWERTY keyboard or try to modify the code to adapt it to your keyboard layout. It is pretty easy!