Adding movement to the hero

Just like in the previous chapter, we will now add movement to our hero. He'll walk over the ground plane and turn around when he reaches the edge of the screen.

The Hero3D class

We'll start by creating a Hero3D class that will encapsulate all the behavior for movement. This class will inherit from GameObject3D class, and just like Hero2D, we will use composition.

Fields

The class has three fields, the model, the direction in which the player will move, and the walk speed.

private GameModel _heroModel;
private int _direction = 1; //1 = Right / -1 = Left
private const int Speed = 75;

Initialize

In the Initialize method we will create a new GameModel instance and set its position.

_heroModel = new GameModel("Game3D/Vampire");
_heroModel.Position = new Vector3(0, -147, -100);

LoadContent and Draw

In the LoadContent and Draw methods we just call LoadContent and Draw methods on _heroModel.

Update

The update is where all the magic happens. In this method, we will calculate the...