Merged branch 'dev_native' into lm_sla_supports_auto

Added igl library files

src/igl/harwell_boeing.h

@@ -0,0 +1,48 @@
+// 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_HARWELL_BOEING_H
+#define IGL_HARWELL_BOEING_H
+#include "igl_inline.h"
+
+#include <Eigen/Sparse>
+#include <vector>
+
+
+namespace igl
+{
+  // Convert the matrix to Compressed sparse column (CSC or CCS) format,
+  // also known as Harwell Boeing format. As described:
+  // http://netlib.org/linalg/html_templates/node92.html
+  // or
+  // http://en.wikipedia.org/wiki/Sparse_matrix
+  //   #Compressed_sparse_column_.28CSC_or_CCS.29
+  // Templates:
+  //   Scalar  type of sparse matrix like double
+  // Inputs:
+  //   A  sparse m by n matrix
+  // Outputs:
+  //   num_rows  number of rows
+  //   V  non-zero values, row indices running fastest, size(V) = nnz 
+  //   R  row indices corresponding to vals, size(R) = nnz
+  //   C  index in vals of first entry in each column, size(C) = num_cols+1
+  //
+  // All indices and pointers are 0-based
+  template <typename Scalar, typename Index>
+  IGL_INLINE void harwell_boeing(
+    const Eigen::SparseMatrix<Scalar> & A,
+    int & num_rows,
+    std::vector<Scalar> & V,
+    std::vector<Index> & R,
+    std::vector<Index> & C);
+}
+
+#ifndef IGL_STATIC_LIBRARY
+#  include "harwell_boeing.cpp"
+#endif
+
+#endif