libigl_Martin/include/igl/find_zero.h

#ifndef IGL_FIND_ZERO_H
#define IGL_FIND_ZERO_H
#include "igl_inline.h"
#include <Eigen/Core>
#include <Eigen/Sparse>
namespace igl
{
  // Find the first zero (whether implicit or explicitly stored) in the
  // rows/columns of a matrix.
  // Inputs:
  //   A  m by n sparse matrix
  //   dim  dimension along which to check for any (1 or 2)
  // Output:
  //   I  n-long vector (if dim == 1)  {m means no zeros found}
  //   or
  //   I  m-long vector (if dim == 2)  {n means no zeros found}
  //
  template <typename AType, typename DerivedI>
  IGL_INLINE void find_zero(
    const Eigen::SparseMatrix<AType> & A,
    const int dim,
    Eigen::PlainObjectBase<DerivedI> & I);
}
#ifndef IGL_STATIC_LIBRARY
#  include "find_zero.cpp"
#endif
#endif