public void validate_static_method_updatedirectionafterrotatingaroundzaxis()
        {
            var dir = _direction.Clone();

            SourceToolbox.UpdateDirectionAfterRotatingAroundZAxis(_angRot.ZRotation, dir);

            Assert.Less(Math.Abs(dir.Ux - _tp[94]), ACCEPTABLE_PRECISION);
            Assert.Less(Math.Abs(dir.Uy - _tp[95]), ACCEPTABLE_PRECISION);
            Assert.Less(Math.Abs(dir.Uz - _tp[96]), ACCEPTABLE_PRECISION);
        }