Phillipes_Fablab/Assets/Catalog.cs

using System.Collections;
using UnityEngine;
using Valve.VR.InteractionSystem;

public class Catalog : MonoBehaviour
{
    private Player player = null;
    public int maxShownObjects = 5;
    public int angle = 180;
    public float distance = .5f;
    public float objectScale = .1f;
    // Start is called before the first frame update
    void Start()
    {
        player = Player.instance;
        if (player == null)
        {
            Debug.LogError("<b>[SteamVR Interaction]</b> Teleport: No Player instance found in map.", this);
            Destroy(this.gameObject);
            return;
        }
        ShowCatalog();
    }

    // Update is called once per frame
    void Update()
    {
    }

    private void ShowCatalog()
    {
        gameObject.transform.SetParent(player.hands[0].transform);
        gameObject.transform.localPosition = Vector3.zero;
        float radians = angle * Mathf.Deg2Rad;
        float angleIncrement = radians / (maxShownObjects - 1);

        for (float i = 0 / 2; i < maxShownObjects; i++)
        {
            var j = i * angleIncrement - radians / 2;
            var sphere = GameObject.CreatePrimitive(PrimitiveType.Sphere);
            sphere.transform.parent = transform;
            sphere.transform.localScale = Vector3.one * objectScale;
            sphere.transform.localPosition = new Vector3(Mathf.Sin(j), 0, Mathf.Cos(j)) * distance;
        }

        StartCoroutine(CatalogCoroutine());
    }

    private IEnumerator CatalogCoroutine()
    {
        var hand = player.hands;
        while (true)
        {

            transform.rotation = Quaternion.LookRotation(transform.position - player.hmdTransform.position);
            transform.rotation = new Quaternion(0, transform.rotation.y, 0, transform.rotation.w);
            yield return null;
        }
    }

    private void OnDrawGizmosSelected()
    {
        float radians = angle * Mathf.Deg2Rad;
        float angleIncrement = radians / (maxShownObjects - 1);
        for (float i = 0 / 2; i < maxShownObjects; i++)
        {
            var j = i * angleIncrement - radians / 2;
            Gizmos.DrawWireSphere(transform.position + new Vector3(Mathf.Sin(j), 0, Mathf.Cos(j)) * distance, objectScale / 2);
        }
    }
}