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Added Norm Function

This commit is contained in:
Nico Pietroni 2005-06-10 11:46:49 +00:00
parent 4ae07c24c1
commit 47b654861c
1 changed files with 14 additions and 0 deletions
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14
vcg/math/matrix33.h
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@ -24,6 +24,9 @@
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$Log: not supported by cvs2svn $
Revision 1.6 2005/06/07 14:29:56 ganovelli
changed from Matrix33Ide to MatrixeeDiag
Revision 1.5 2005/05/23 15:05:26 ganovelli
Matrix33Diag Added: it implements diagonal matrix. Added only operator += in Matrix33
@ -375,6 +378,17 @@ void ExternalProduct(const Point3<S> &a, const Point3<S> &b)
(*this)[i][j] = a[i]*b[j];
}
/* Compute the Frobenius Norm of the Matrix
*/
ScalarType Norm()
{
ScalarType SQsum=0;
for(int i=0;i<3;++i)
for(int j=0;j<3;++j)
SQsum += a[i]*a[i];
return (math::Sqrt(SQsum));
}
/*
It compute the cross covariance matrix of two set of 3d points P and X;
it returns also the barycenters of P and X.