Merged branch 'dev_native' into lm_sla_supports_auto

Added igl library files

src/igl/writeTGF.cpp

@@ -0,0 +1,73 @@
+// 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/.
+#include "writeTGF.h"
+#include <cstdio>
+
+IGL_INLINE bool igl::writeTGF(
+  const std::string tgf_filename,
+  const std::vector<std::vector<double> > & C,
+  const std::vector<std::vector<int> > & E)
+{
+  FILE * tgf_file = fopen(tgf_filename.c_str(),"w");
+  if(NULL==tgf_file)
+  {
+    printf("IOError: %s could not be opened\n",tgf_filename.c_str());
+    return false;  
+  }
+  // Loop over vertices
+  for(int i = 0; i<(int)C.size();i++)
+  {
+    assert(C[i].size() == 3);
+    // print a line with vertex number then "description"
+    // Where "description" in our case is the 3d position in space
+    // 
+    fprintf(tgf_file,
+      "%4d "
+      "%10.17g %10.17g %10.17g " // current location
+      // All others are not needed for this legacy support
+      "\n",
+      i+1,
+      C[i][0], C[i][1], C[i][2]);
+  }
+
+  // print a comment to separate vertices and edges
+  fprintf(tgf_file,"#\n");
+
+  // loop over edges
+  for(int i = 0;i<(int)E.size();i++)
+  {
+    assert(E[i].size()==2);
+    fprintf(tgf_file,"%4d %4d\n",
+      E[i][0]+1,
+      E[i][1]+1);
+  }
+
+  // print a comment to separate edges and faces
+  fprintf(tgf_file,"#\n");
+
+  fclose(tgf_file);
+
+  return true;
+}
+
+#ifndef IGL_NO_EIGEN
+#include "matrix_to_list.h"
+
+IGL_INLINE bool igl::writeTGF(
+  const std::string tgf_filename,
+  const Eigen::MatrixXd & C,
+  const Eigen::MatrixXi & E)
+{
+  using namespace std;
+  vector<vector<double> > vC;
+  vector<vector<int> > vE;
+  matrix_to_list(C,vC);
+  matrix_to_list(E,vE);
+  return writeTGF(tgf_filename,vC,vE);
+}
+#endif