inline float Vector2F::Angle (Vector2F const& other) const
{
// P.Q = ||P|| * ||Q|| * cos(theta)
// P.Q/(||P|| * ||Q||) = cos(theta)
// Therefore, theta = arccos( P.Q/(||P|| * ||Q||) )
return acos(Dot(other)/(Norm() * other.Norm()));
}
inline float Vector2F::Angle (Vector2F const& other) const
{
// P.Q = ||P|| * ||Q|| * cos(theta)
// P.Q/(||P|| * ||Q||) = cos(theta)
// Therefore, theta = arccos( P.Q/(||P|| * ||Q||) )
return acos(Dot(other)/(Norm() * other.Norm()));
}