public static bool AreCoplanar <V> (this IEnumerable <V> vertices)
where V : struct, IVertex <Vec3>
{
if (vertices.Count() < 4)
{
return(true);
}
var first = EnumerableExt.Next(ref vertices).position;
var ab = EnumerableExt.Next(ref vertices).position - first;
var ac = EnumerableExt.Next(ref vertices).position - first;
var normal = ab.Cross(ac);
return(vertices.All(v => normal.Dot(v.position - first).ApproxEquals(0f, 0.1f)));
}
