Newbie question: how to use setActorToFollow?

[Alex Rudenko]

I am doing the following:

game.input.keyboard.on("press", (evt: any) => {
  console.log('here')
  ball.once('update', () => {
    ball.vel.setTo(50, 50);
  });
});


game.rootScene.camera.setActorToFollow(ball);

And I am expecting to the camera to follow the ball as it moves. But it's not working (the ball moves and leaves the viewport eventually). Could someone explain how to make it work?

[Erik Onarheim]

Hi Alex, 

I can't fault you, the documentation is wrong here sadly. I've opened an issue to address this https://github.com/excaliburjs/Excalibur/issues/908

In order for `setActorToFollow()` to work the base camera needs to be replaced with a new implementation called `ex.LockedCamera`. I have a pen with an example here: 

https://codepen.io/eonarheim/pen/gXogGp?editors=0010

Let me know if this works out for you.

Cheers,
Erik