/// <summary>
/// Returns a value indicating the concavity of the vectors.
/// 1 = Pointing the same way.
/// > 0 = Concave.
/// 0 = Orthogonal.
/// < 0 = Convex.
/// -1 = Pointing the exact opposite way.
/// </summary>
/// <param name="vector"></param>
/// <returns></returns>
public double ConcavityColinearity(NVector vector)
{
return(_vector.ConcavityCollinearity(vector));
}