-// Copyright (C) 2007-2015 CEA/DEN, EDF R&D
+// Copyright (C) 2007-2016 CEA/DEN, EDF R&D
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
#ifndef __VECTORUTILS_HXX__
#define __VECTORUTILS_HXX__
+#include <algorithm>
#include <sstream>
#include <numeric>
#include <string>
#include <cmath>
#include <map>
+
namespace INTERP_KERNEL
{
/// Precision used for tests of 3D part of INTERP_KERNEL
// return std::fabs(x - y) < errTol;
}
+
+ /**
+ * Test whether two 3D vectors are colinear. The two vectors are expected to be of unit norm (not checked)
+ * Implemented by checking that the norm of the cross product is null.
+ */
+ inline bool isColinear3D(const double *v1, const double *v2, const double eps = DEFAULT_ABS_TOL)
+ {
+ double cros[3];
+ cross(v1, v2, cros);
+ return epsilonEqual(dot(cros, cros), 0.0, eps);
+ }
+
+
/**
* Compares doubles using a relative tolerance
* This is suitable mainly for comparing larger values to each other. Before performing the relative test,
