public _Collider[] getFrontierColliders(_Collider c)
{
List <_Collider> cols = new List <_Collider>();
foreach (_Collider other in colliders)
{
if (c.Equals(other))
{
continue;
}
float distance = (c.Transform.position - other.Transform.position).magnitude;
if (distance < c.Extent + other.Extent)
{
cols.Add(other);
}
}
return(cols.ToArray());
}