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bug #977: avoid division by 0 in normalize() and normalized().

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This commit is contained in:
Gael Guennebaud
2016-01-21 20:43:42 +01:00
parent 7cae8918c0
commit ee37eb4eed
2 changed files with 25 additions and 3 deletions
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9
test/adjoint.cpp
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@@ -42,6 +42,15 @@ template<> struct adjoint_specific<false> {
VERIFY_IS_APPROX(v1, v1.norm() * v3);
VERIFY_IS_APPROX(v3, v1.normalized());
VERIFY_IS_APPROX(v3.norm(), RealScalar(1));
// check null inputs
VERIFY_IS_APPROX((v1*0).normalized(), (v1*0));
RealScalar very_small = (std::numeric_limits<RealScalar>::min)();
VERIFY( (v1*very_small).norm() == 0 );
VERIFY_IS_APPROX((v1*very_small).normalized(), (v1*very_small));
v3 = v1*very_small;
v3.normalize();
VERIFY_IS_APPROX(v3, (v1*very_small));
// check compatibility of dot and adjoint
ref = NumTraits<Scalar>::IsInteger ? 0 : (std::max)((std::max)(v1.norm(),v2.norm()),(std::max)((square * v2).norm(),(square.adjoint() * v1).norm()));