ARUP.IssueTracker.Navisworks.NavisWindow.MultiplyRotation3D C# (CSharp) Method

MultiplyRotation3D() private method

private MultiplyRotation3D ( Rotation3D r2, Rotation3D r1 ) : Rotation3D
r2 Rotation3D
r1 Rotation3D
return Rotation3D
        private Rotation3D MultiplyRotation3D(
            Rotation3D r2,
            Rotation3D r1)
        {

            Rotation3D oRot =
                new Rotation3D(r2.D * r1.A + r2.A * r1.D +
                                    r2.B * r1.C - r2.C * r1.B,
                                r2.D * r1.B + r2.B * r1.D +
                                    r2.C * r1.A - r2.A * r1.C,
                                r2.D * r1.C + r2.C * r1.D +
                                    r2.A * r1.B - r2.B * r1.A,
                                r2.D * r1.D - r2.A * r1.A -
                                    r2.B * r1.B - r2.C * r1.C);

            oRot.Normalize();

            return oRot;

        }
            private double GetGunits()