/// Create a rotation matrix from a rotation around the `x` axis (pitch).
Create a rotation matrix from a rotation around the `x` axis (pitch).
Create a rotation matrix from a rotation around the ` x ` axis ( pitch ) .
pub fn from_angle_x(theta: Rad<S>) -> Matrix3<S> {
        // http://en.wikipedia.org/wiki/Rotation_matrix#Basic_rotations
        let (s, c) = Rad::sin_cos(theta);
        Matrix3::new(S::one(), S::zero(), S::zero(),
                     S::zero(), c, s,
                     S::zero(), -s, c)
    }
pub fn from_angle_x ( theta : Rad < S > ) -> Matrix3 < S > { // http://en.wikipedia.org/wiki/Rotation_matrix#Basic_rotations let ( s , c ) = Rad :: sin_cos ( theta ) ; Matrix3 :: new ( S :: one ( ) , S :: zero ( ) , S :: zero ( ) , S :: zero ( ) , c , s , S :: zero ( ) , - s , c ) }
Create a rotation matrix from a rotation around the `x` axis (pitch).
Create a rotation matrix from a rotation around the ` x ` axis ( pitch ) .
theta
Rad<S>