Merged branch 'dev_native' into lm_sla_supports_auto

Added igl library files

src/igl/sortrows.h

@@ -0,0 +1,42 @@
+// 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_SORTROWS_H
+#define IGL_SORTROWS_H
+#include "igl_inline.h"
+
+#include <vector>
+#include <Eigen/Core>
+namespace igl
+{
+  // Act like matlab's [Y,I] = sortrows(X)
+  //
+  // Templates:
+  //   DerivedX derived scalar type, e.g. MatrixXi or MatrixXd
+  //   DerivedI derived integer type, e.g. MatrixXi
+  // Inputs:
+  //   X  m by n matrix whose entries are to be sorted
+  //   ascending  sort ascending (true, matlab default) or descending (false)
+  // Outputs:
+  //   Y  m by n matrix whose entries are sorted (**should not** be same
+  //     reference as X)
+  //   I  m list of indices so that
+  //     Y = X(I,:);
+  template <typename DerivedX, typename DerivedI>
+  IGL_INLINE void sortrows(
+    const Eigen::DenseBase<DerivedX>& X,
+    const bool ascending,
+    Eigen::PlainObjectBase<DerivedX>& Y,
+    Eigen::PlainObjectBase<DerivedI>& I);
+}
+
+#ifndef IGL_STATIC_LIBRARY
+#  include "sortrows.cpp"
+#endif
+
+#endif
+