commit 823b2105b660ad9953036eea00da61bd2822d7e0
author Gael Guennebaud <g.gael@free.fr> Thu Sep 22 17:34:25 2011 +0200
committer Gael Guennebaud <g.gael@free.fr> Thu Sep 22 17:34:25 2011 +0200
tree e2c081a4893fd774c8376f40e94d1d146846256c
parent b0adbfbae716bbeac362aae1d931de24b8bb83f5

fix atan2 when tmp4==0

unsupported/Eigen/src/AutoDiff/AutoDiffScalar.h

diff --git a/unsupported/Eigen/src/AutoDiff/AutoDiffScalar.h b/unsupported/Eigen/src/AutoDiff/AutoDiffScalar.h
index 3510fba..0afea3b 100644
--- a/unsupported/Eigen/src/AutoDiff/AutoDiffScalar.h
+++ b/unsupported/Eigen/src/AutoDiff/AutoDiffScalar.h
@@ -569,6 +569,7 @@
 atan2(const AutoDiffScalar<DerTypeA>& a, const AutoDiffScalar<DerTypeB>& b)
 {
   using std::atan2;
+  using std::max;
   typedef typename internal::traits<DerTypeA>::Scalar Scalar;
   typedef AutoDiffScalar<Matrix<Scalar,Dynamic,1> > PlainADS;
   PlainADS ret;
@@ -580,8 +581,6 @@
   
   if (tmp4!=0)
     ret.derivatives() = (a.derivatives() * b.value() - a.value() * b.derivatives()) * (tmp2+tmp3);
-  else
-    ret.derivatives().setZero();
 
   return ret;
 }