Merged branch 'dev_native' into lm_sla_supports_auto

Added igl library files

src/igl/is_symmetric.h

@@ -0,0 +1,34 @@
+// 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/.
+#ifndef IGL_IS_SYMMETRIC_H
+#define IGL_IS_SYMMETRIC_H
+#include "igl_inline.h"
+#define EIGEN_YES_I_KNOW_SPARSE_MODULE_IS_NOT_STABLE_YET
+#include <Eigen/Sparse>
+namespace igl
+{
+  // Returns true if the given matrix is symmetric
+  // Inputs:
+  //   A  m by m matrix
+  // Returns true if the matrix is square and symmetric
+  template <typename AT>
+  IGL_INLINE bool is_symmetric(const Eigen::SparseMatrix<AT>& A);
+  // Inputs:
+  //   epsilon threshold on L1 difference between A and A'
+  template <typename AT, typename epsilonT>
+  IGL_INLINE bool is_symmetric(const Eigen::SparseMatrix<AT>& A, const epsilonT epsilon);
+  template <typename DerivedA>
+  IGL_INLINE bool is_symmetric(
+    const Eigen::PlainObjectBase<DerivedA>& A);
+}
+
+#ifndef IGL_STATIC_LIBRARY
+#  include "is_symmetric.cpp"
+#endif
+
+#endif