Rotation on y axis or freezing a child object's y axis

Unity Engine
,
1

Hi!

1517×503 101 KB

I need to keep the arrow, which is a child of the sphere, facing forward. The sphere is linked to the player via the code.

void Update()
{
Vector3 directionToPlayer = playerBody.position - transform.position;
transform.forward = -directionToPlayer;
}

The problem is that when the player gets too close the arrow goes into the ground.

1519×567 110 KB

I’ve tried a handful of different things but I don’t know how to get it to work the way I need it to. I think if I could get the ball to only rotate on the y-axis, that would work, but I’m unsure how to do that and still have the player movement decide the sphere’s movement.

2

Don’t make the arrow the child of the sphere. Make them both siblings of a parent object. The arrow can follow the sphere’s position, and be rotated towards the target.

3

Sorry I think I didn’t explain what I needed well, or I’m misunderstanding your solution, I need the arrow to rotate around the ball like this:

The problem is when I get close and when the player passes over the sphere the arrow goes under the ground like this:

The expected behaviour of the arrow when the player is passing over it is that it quickly rotates around the y-axis of the ball and is facing 180 degrees from where it was pointing.

4

Right, I didn’t realise the ‘player’ is the camera.

You just need to flatten your direction, which is super simple:

Vector3 directionToPlayer = playerBody.position - transform.position;
directionToPlayer.y = 0f;
transform.forward = -directionToPlayer;
5

Yeah I realized and ended up with this

void Update()
{
Vector3 playerVecNoY =
new Vector3(playerBody.position.x, 0.0f, playerBody.position.z);

Vector3 ballVecNoY =
new Vector3(transform.position.x, 0.0f, transform.position.z);

Vector3 directionToPlayer = playerVecNoY - ballVecNoY;
transform.forward = -directionToPlayer;
}

which is the same but 10x the code, yikes. Thank you so much!

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