def testNormalNullVector(self): assert_equal(util.normal(self.e1, self.null), 0.0)
def testNormal(self): assert_equal(util.normal(self.e1, self.e2), self.e3)
def testNormalNullVector(self): assert_equal(util.normal(self.e1, self.null), 0.0)
def testNormal(self): assert_equal(util.normal(self.e1, self.e2), self.e3)