Configuring the Game - Learning LibGDX Game Development - page 123

private Sprite target;
public CameraHelper () {
position = new Vector2();
zoom = 1.0f;
}
public void update (float deltaTime) {
if (!hasTarget()) return;
position.x = target.getX() + target.getOriginX();
position.y = target.getY() + target.getOriginY();
}
public void setPosition (float x, float y) {
this.position.set(x, y);
}
public Vector2 getPosition () { return position; }
public void addZoom (float amount) { setZoom(zoom + amount); }
public void setZoom (float zoom) {
this.zoom = MathUtils.clamp(zoom, MAX_ZOOM_IN, MAX_ZOOM_OUT);
}
public float getZoom () { return zoom; }
public void setTarget (Sprite target) { this.target = target; }
public Sprite getTarget () { return target; }
public boolean hasTarget () { return target != null; }
public boolean hasTarget (Sprite target) {
return hasTarget() && this.target.equals(target);
}
public void applyTo (OrthographicCamera camera) {
camera.position.x = position.x;
camera.position.y = position.y;
camera.zoom = zoom;
camera.update();
}
}