Merged branch 'dev_native' into lm_sla_supports_auto

Added igl library files

src/igl/SortableRow.h

@@ -0,0 +1,70 @@
+// 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_SORTABLE_ROW_H
+#define IGL_SORTABLE_ROW_H
+
+// Simple class to contain a rowvector which allows rowwise sorting and
+// reordering
+#include <Eigen/Core>
+
+namespace igl
+{
+  // Templates:
+  //   T  should be a matrix that implements .size(), and operator(int i)
+  template <typename T>
+  class SortableRow
+  {
+    public:
+      T data;
+    public:
+      SortableRow():data(){};
+      SortableRow(const T & data):data(data){};
+      bool operator<(const SortableRow & that) const
+      {
+        // Get reference so that I can use parenthesis
+        const SortableRow<T> & THIS = *this;
+        // Lexicographical
+        int minc = (THIS.data.size() < that.data.size()? 
+            THIS.data.size() : that.data.size());
+        // loop over columns
+        for(int i = 0;i<minc;i++)
+        {
+          if(THIS.data(i) == that.data(i))
+          {
+            continue;
+          }
+          return THIS.data(i) < that.data(i);
+        }
+        // All characters the same, comes done to length
+        return THIS.data.size()<that.data.size();
+      };
+      bool operator==(const SortableRow & that) const
+      {
+        // Get reference so that I can use parenthesis
+        const SortableRow<T> & THIS = *this;
+        if(THIS.data.size() != that.data.size())
+        {
+          return false;
+        }
+        for(int i = 0;i<THIS.data.size();i++)
+        {
+          if(THIS.data(i) != that.data(i))
+          {
+            return false;
+          }
+        }
+        return true;
+      };
+      bool operator!=(const SortableRow & that) const
+      {
+        return !(*this == that);
+      };
+  };
+}
+
+#endif