I am following an eBook called "Learning Libgdx Game Development"

In it, the author implements a CameraHelper class that implements Zoom, target-following behaviour, and probably some other things along the way.

Can I do this just by extending the camera class, or using composition?

Approaching it like this seems like a clearer code to me:

public class Camera extends OrthographicCamera {
    GameObject target;
    boolean followTarget;

    Camera(float viewWidth, float viewHeight){
        super(viewWidth, viewHeight);

    public void setTarget(GameObject target) {
        this.target = target;

    public GameObject getTarget() {
        return target;

    public void update(){
        if(followTarget && target != null){
            this.position.x = target.position.x;
            this.position.y = target.position.y;

Any problems with this that I can expect?

  • \$\begingroup\$ You don't need to ask us for permission to write code that you personally find clearer. If it looks clearer to you, go for it. If you run into a problem along the way, ask about that concrete problem and we can help you find concrete solutions. \$\endgroup\$ – DMGregory Jul 28 '19 at 19:13

Yes, you can. I don't see any extra problems. It is OOP way.

  • Camera extends OrthographicCamera -> Camera IS OrthographicCamera
  • CameraHelper isn't Camera it Helps to work with camera. This is like lib with commonly used stuff. For example if camera doesn't follow player (no need), you don't use/call method from CameraHelper class.
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