Merged branch 'dev_native' into lm_sla_supports_auto

Added igl library files

src/igl/readWRL.cpp

@@ -0,0 +1,121 @@
+// 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 "readWRL.h"
+#include <iostream>
+
+template <typename Scalar, typename Index>
+IGL_INLINE bool igl::readWRL(
+  const std::string wrl_file_name,
+  std::vector<std::vector<Scalar > > & V,
+  std::vector<std::vector<Index > > & F)
+{
+  using namespace std;
+  FILE * wrl_file = fopen(wrl_file_name.c_str(),"r");
+  if(NULL==wrl_file)
+  {
+    printf("IOError: %s could not be opened...",wrl_file_name.c_str());
+    return false;
+  }
+  return readWRL(wrl_file,V,F);
+}
+
+template <typename Scalar, typename Index>
+IGL_INLINE bool igl::readWRL(
+  FILE * wrl_file,
+  std::vector<std::vector<Scalar > > & V,
+  std::vector<std::vector<Index > > & F)
+{
+  using namespace std;
+
+  char line[1000];
+  // Read lines until seeing "point ["
+  // treat other lines in file as "comments"
+  bool still_comments = true;
+  string needle("point [");
+  string haystack;
+  while(still_comments)
+  {
+    if(fgets(line,1000,wrl_file) == NULL)
+    {
+      std::cerr<<"readWRL, reached EOF without finding \"point [\""<<std::endl;
+      fclose(wrl_file);
+      return false;
+    }
+    haystack = string(line);
+    still_comments = string::npos == haystack.find(needle);
+  }
+
+  // read points in sets of 3
+  int floats_read = 3;
+  double x,y,z;
+  while(floats_read == 3)
+  {
+    floats_read = fscanf(wrl_file," %lf %lf %lf,",&x,&y,&z);
+    if(floats_read == 3)
+    {
+      vector<Scalar > point;
+      point.resize(3);
+      point[0] = x;
+      point[1] = y;
+      point[2] = z;
+      V.push_back(point);
+      //printf("(%g, %g, %g)\n",x,y,z);
+    }else if(floats_read != 0)
+    {
+      printf("ERROR: unrecognized format...\n");
+      return false;
+    }
+  }
+  // Read lines until seeing "coordIndex ["
+  // treat other lines in file as "comments"
+  still_comments = true;
+  needle = string("coordIndex [");
+  while(still_comments)
+  {
+    fgets(line,1000,wrl_file);
+    haystack = string(line);
+    still_comments = string::npos == haystack.find(needle);
+  }
+  // read F
+  int ints_read = 1;
+  while(ints_read > 0)
+  {
+    // read new face indices (until hit -1)
+    vector<Index > face;
+    while(true)
+    {
+      // indices are 0-indexed
+      int i;
+      ints_read = fscanf(wrl_file," %d,",&i);
+      if(ints_read > 0)
+      {
+        if(i>=0)
+        {
+          face.push_back(i);
+        }else
+        {
+          F.push_back(face);
+          break;
+        }
+      }else
+      {
+        break;
+      }
+    }
+  }
+
+
+
+  fclose(wrl_file);
+  return true;
+}
+
+#ifdef IGL_STATIC_LIBRARY
+// Explicit template instantiation
+template bool igl::readWRL<double, int>(std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::vector<std::vector<double, std::allocator<double> >, std::allocator<std::vector<double, std::allocator<double> > > >&, std::vector<std::vector<int, std::allocator<int> >, std::allocator<std::vector<int, std::allocator<int> > > >&);
+#endif