Restrict gameobject inside a radius around my player

Question

I need to restrict my Players hand inside a radius around the character. The game is 2D and the hand movement is basically exactly the same as: Madness Interactive (https://www.newgrounds.com/portal/view/118826)

[SerializeField] private float speed = 2f;
[SerializeField] private GameObject radiusCenter;
[SerializeField] private float radius = 0.5f;


void Start()
{
    Cursor.visible = false;
}



void Update()
{

    Vector3 playerPos = radiusCenter.transform.position;
    Vector3 playerToHand = this.transform.position - playerPos;


    var moveDirection = new Vector3(Input.GetAxis("Mouse X"), Input.GetAxis("Mouse Y"), 0);

    float DistanceToRadius = Vector3.Distance(playerPos, playerToHand);


    transform.position += moveDirection * speed * Time.deltaTime;
    
    

    float angle = Mathf.Atan2(playerToHand.y, playerToHand.x) * Mathf.Rad2Deg;
    transform.rotation = Quaternion.AngleAxis(angle, Vector3.forward);

}

I cant figure out the way to keep my players hand inside a set radius around my player, see pictures below for further explanation:

I thought maybe I could get a float value from playerPos and playerToHand and create a IF-statement that restricts the hand from going outside the set radius float, but I didnt get it to work...

EDIT 1: The hand is a child of my player. I use a gameObject in the center of my player as radiusCenter which my hand rotates around.

Maybe this helps you to figure out the logic [how to limit and clamp distance between two points in a Line renderer unity2d](https://stackoverflow.com/questions/56317745/how-to-limit-and-clamp-distance-between-two-points-in-a-line-renderer-unity2d) — derHugo, Mar 29 '21 at 17:12

Simonster · Accepted Answer · 2021-03-29T17:40:10.337

2

One very simple way to check if the hand is too far away is to use this line of code:

<movement code here>
if (Vector3.distance(playerPos, transform.position) > radius)
{
    transform.localPosition = transform.localPosition.normalized * radius;
{

This will make it so if the hand will be outside the circle after the move, it will just put the hand on the circle.

edited Mar 29 '21 at 17:40

answered Mar 29 '21 at 17:08

Simonster

593
4
10

I tried your code with some minor tweaks:if (Vector3.Distance(playerPos, transform.position) < radius) The issue now is that as soon as i reach the radius outer limit the hand just stops moving at all... I just want it to be restricted inside the circle, but still move even tho its on the outer most edge! – Sam Andersson Mar 29 '21 at 17:15
I your hand a child of your player? – Simonster Mar 29 '21 at 17:19
Yes! I should mention that in the question. – Sam Andersson Mar 29 '21 at 17:20
Ok. Then, you can use the code I wrote but instead of putting your moving code inside it, you should put `transform.localPosition = transform.localPosition.normalized * radius` so if the hand is out of range, it will just put it back to the circle around your player. – Simonster Mar 29 '21 at 17:26
Hmm, now the hand wont enter the circle. I think it should be the other way around! I want to restrict the hand inside the circle. Now its outside – Sam Andersson Mar 29 '21 at 17:29
Then I think the condition is wrong because then it is only putting the hand on the circle if it is inside the circle. They reversing the sign. – Simonster Mar 29 '21 at 17:32
Ah now it works! I had the "<" wrong! Can you please Edit your answer and I accept it as the solution! – Sam Andersson Mar 29 '21 at 17:37
if (Vector3.Distance(playerPos, transform.position) > radius) transform.localPosition = transform.localPosition.normalized * radius; – Sam Andersson Mar 29 '21 at 17:38
2

Ok. Finished Editing. – Simonster Mar 29 '21 at 17:40

Restrict gameobject inside a radius around my player

1 Answers1