Abacus.DoublePrecision.QuaternionTests.AssertEqualOrNegatedWithinReason C# (CSharp) Method

        internal static void AssertEqualOrNegatedWithinReason (Quaternion a, Quaternion b)
        {
            Double tolerance; MathsTests.TestTolerance(out tolerance);

            Boolean pass1 =
                Math.Abs (a.I - b.I) <= tolerance &&
                Math.Abs (a.J - b.J) <= tolerance &&
                Math.Abs (a.K - b.K) <= tolerance &&
                Math.Abs (a.U - b.U) <= tolerance;

            Quaternion c;
            Quaternion.Negate (ref b, out c);

            Boolean pass2 =
                Math.Abs (a.I - c.I) <= tolerance &&
                Math.Abs (a.J - c.J) <= tolerance &&
                Math.Abs (a.K - c.K) <= tolerance &&
                Math.Abs (a.U - c.U) <= tolerance;

            Assert.That(pass1 || pass2, Is.EqualTo (true));
        }