How to create a Circle around object ?

[BDV]

Hi guys , i have some scanner models in my scene and i need to create a circle that shows the distance from the scanner (attachment)… so i also need to have the option to scale the circle any ideas ?? thanks

[mhtraylor]

You could create another GameObject (such as a flattened Cube or some custom low-poly Plane) with a transparent material and circle texture, and parent it to your scanner object. Then you can access it in script and modify its local scale, position, etc. like so (this script spins the circle and scales it based on input):

using UnityEngine;

public class TestScript : MonoBehaviour
{
    Transform circle;
    public float scaleSpeed, rotSpeed;

    void Awake()
    {
        circle = transform.Find("Circle");
    }

    void Update()
    {

        float dxz = Input.GetAxis("Vertical") * scaleSpeed * Time.deltaTime;
        circle.localScale += new Vector3(dxz, 0.0f, dxz);
        circle.Rotate(Vector3.up * rotSpeed * Time.deltaTime);
    }
}

Here’s what mine looks like: