libigl_Martin/include/igl/cross.cpp

// This file is part of libigl, a simple c++ geometry processing library.
// 
// Copyright (C) 2013 Alec Jacobson <alecjacobson@gmail.com>
// 
// This Source Code Form is subject to the terms of the Mozilla Public License 
// v. 2.0. If a copy of the MPL was not distributed with this file, You can 
// obtain one at http://mozilla.org/MPL/2.0/.
#include "cross.h"

// http://www.antisphere.com/Wiki/tools:anttweakbar
IGL_INLINE void igl::cross(
  const double *a, 
  const double *b,
  double *out)
{
  out[0] = a[1]*b[2]-a[2]*b[1];
  out[1] = a[2]*b[0]-a[0]*b[2];
  out[2] = a[0]*b[1]-a[1]*b[0];
}