Merged branch 'dev_native' into lm_sla_supports_auto

Added igl library files

src/igl/invert_diag.h

@@ -0,0 +1,36 @@
+// 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_INVERT_DIAG_H
+#define IGL_INVERT_DIAG_H
+#include "igl_inline.h"
+#define EIGEN_YES_I_KNOW_SPARSE_MODULE_IS_NOT_STABLE_YET
+#include <Eigen/Sparse>
+
+namespace igl
+{
+  // Invert the diagonal entries of a matrix (if the matrix is a diagonal
+  // matrix then this amounts to inverting the matrix)
+
+  // Templates:
+  //   T  should be a eigen sparse matrix primitive type like int or double
+  // Inputs:
+  //   X  an m by n sparse matrix
+  // Outputs:
+  //   Y  an m by n sparse matrix
+  template <typename T>
+  IGL_INLINE void invert_diag(
+    const Eigen::SparseMatrix<T>& X, 
+    Eigen::SparseMatrix<T>& Y);
+}
+
+#ifndef IGL_STATIC_LIBRARY
+#  include "invert_diag.cpp"
+#endif
+
+#endif
+