SpaceshipDemo/Assets/Scripts/AxelF/Code/AudioSlapback.cs

using System.Collections.Generic;
using UnityEngine;
using NonSerializedAttribute = System.NonSerializedAttribute;

namespace AxelF {

public class AudioSlapback : Zone {
    public static readonly HashSet<AudioSlapback> allSlapbacks = new HashSet<AudioSlapback>();

    public static AudioSlapback FindClosest(Vector3 p, out Vector3 rp, out Vector3 rd) {
        var lp = Heartbeat.listenerTransform.position;
        float dp = Mathf.Infinity;
        AudioSlapback z = null;

        rp = Vector3.zero;
        rd = Vector3.zero;
        p.y = 0f;

        foreach (var i in allSlapbacks) {
            var t = i.transform;
            var qq = t.position;
            var q = qq;
            q.y = 0f;

            var d = q - p;
            float e = d.sqrMagnitude;
            if (dp <= e)
                continue;

            var fwd = t.forward;
            if (Vector3.Dot(d.normalized, fwd) >= 0f)
                continue;

            var ld = q - lp;
            if (Vector3.Dot(ld.normalized, fwd) >= 0f)
                continue;

            dp = e;
            rp = qq;
            rd = d;
            z = i;
        }

        return z;
    }

    protected new void OnEnable() {
        base.OnEnable();
        allSlapbacks.Add(this);
    }

    protected new void OnDisable() {
        allSlapbacks.Remove(this);
        base.OnDisable();
    }
}

} // AxelF