How to make sprite follow other sprite.

1

Looking for a way to have a sprite follow another sprite. I have some somewhat unique code that detects collision and position in a public method for the class.

   public Player(Vector2 Position, Rectangle CollisionBox)
        {

            GetCollider = CollisionBox;
            GetPosition = Position;
            

        }

The same is true for the enemy Tracker class

public Tracker(Vector2 Position, Rectangle CollisionBox)
{
GetCollider = CollisionBox;
GetPosition = Position;
}

How would I get it so that the Tracker class basically follows the Player class when nearby?

2

I don’t entirely understand your code (the name of a variable or field should be a noun, never a command (“GetCollider” is a confusing name for a field)),

… but ONE tracking approach would be (in pseudocode):

In game Initialize():

  • tracker.SetTarget(player); // which assigns “player” to a “_target” private field inside Tracker

In tracker.Update(GameTime gameTime):

var toTarget = _target.Position - Position;
if (toTarget .Length <= MinDistanceToFollowTarget)
{
// target in reach
var targetDirection = toTarget;
targetDirection.Normalize();
_velocity = targetDirection * FollowSpeed; // set private field _velocity to pursuit the target
}
else
{
_velocity = Vector2.Zero; // target too far, stop moving…
}
// integrate movement for the current frame:
Position += _velocity * gameTime.ElapsedGameTime.TotalSeconds;

… where MinDistanceToFollowTarget and FollowSpeed are constants you need to declare and choose a value for that fits your needs

4

So the tracker.update would be in the Tracker Class or the game class?

5

cleanest code would be if indeed that update code is in the tracker class yes. and in your game class, you can instantiate a tracker and call tracker.update from game.update

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