Function nalgebra::to_rot_mat

pub fn to_rot_mat<N, LV, AV, R, M>(r: &R) -> M where R: RotationMatrix<N, LV, AV, Output=M>, M: SquareMat<N, LV> + Rotation<AV> + Copy, LV: Mul<M, Output=LV>

Builds a rotation matrix from r.