From ad3c7520f8afddafb629bb12871ba7a6208ba1f3 Mon Sep 17 00:00:00 2001
From: Oliver Sander <sander@igpm.rwth-aachen.de>
Date: Sun, 7 Mar 2010 18:06:42 +0000
Subject: [PATCH] use new method derivativeofArcCosSquared in second derivative
of distance
[[Imported from SVN: r5672]]
---
src/unitvector.hh | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/src/unitvector.hh b/src/unitvector.hh
index 446a6a30..f433d64a 100644
--- a/src/unitvector.hh
+++ b/src/unitvector.hh
@@ -115,7 +115,7 @@ public:
// Bring it all together
result = A;
result *= -2;
- result.axpy(-2*std::acos(sp)/std::sqrt(1-sp*sp), B);
+ result.axpy(derivativeOfArcCosSquared(sp), B);
return result;
}
--
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