From fd1b5772af95933673248c6450c3115f994ff70b Mon Sep 17 00:00:00 2001
From: Eric Bechet <eric.bechet@ulg.ac.be>
Date: Wed, 16 Dec 2009 17:36:09 +0000
Subject: [PATCH] dot product
---
Geo/STensor3.h | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/Geo/STensor3.h b/Geo/STensor3.h
index d5bfbc4a1a..63413901ce 100644
--- a/Geo/STensor3.h
+++ b/Geo/STensor3.h
@@ -266,5 +266,14 @@ inline void tensprod(const SVector3 &a, const SVector3 &b, STensor3 &c)
c(i,j)=a(i)*b(j);
}
+inline double dot(const STensor3 &a, const STensor3 &b)
+{
+ double prod=0;
+ for (int i = 0; i < 3; i++)
+ for (int j = 0; j < 3; j++)
+ prod+=a(i,j)*b(i,j);
+ return prod;
+}
+
#endif
--
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