122 lines
3.1 KiB
C++
122 lines
3.1 KiB
C++
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// This file is part of libigl, a simple c++ geometry processing library.
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//
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// Copyright (C) 2013 Alec Jacobson <alecjacobson@gmail.com>
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//
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// This Source Code Form is subject to the terms of the Mozilla Public License
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// v. 2.0. If a copy of the MPL was not distributed with this file, You can
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// obtain one at http://mozilla.org/MPL/2.0/.
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#include "readWRL.h"
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#include <iostream>
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template <typename Scalar, typename Index>
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IGL_INLINE bool igl::readWRL(
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const std::string wrl_file_name,
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std::vector<std::vector<Scalar > > & V,
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std::vector<std::vector<Index > > & F)
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{
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using namespace std;
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FILE * wrl_file = fopen(wrl_file_name.c_str(),"r");
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if(NULL==wrl_file)
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{
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printf("IOError: %s could not be opened...",wrl_file_name.c_str());
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return false;
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}
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return readWRL(wrl_file,V,F);
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}
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template <typename Scalar, typename Index>
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IGL_INLINE bool igl::readWRL(
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FILE * wrl_file,
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std::vector<std::vector<Scalar > > & V,
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std::vector<std::vector<Index > > & F)
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{
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using namespace std;
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char line[1000];
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// Read lines until seeing "point ["
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// treat other lines in file as "comments"
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bool still_comments = true;
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string needle("point [");
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string haystack;
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while(still_comments)
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{
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if(fgets(line,1000,wrl_file) == NULL)
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{
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std::cerr<<"readWRL, reached EOF without finding \"point [\""<<std::endl;
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fclose(wrl_file);
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return false;
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}
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haystack = string(line);
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still_comments = string::npos == haystack.find(needle);
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}
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// read points in sets of 3
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int floats_read = 3;
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double x,y,z;
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while(floats_read == 3)
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{
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floats_read = fscanf(wrl_file," %lf %lf %lf,",&x,&y,&z);
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if(floats_read == 3)
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{
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vector<Scalar > point;
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point.resize(3);
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point[0] = x;
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point[1] = y;
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point[2] = z;
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V.push_back(point);
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//printf("(%g, %g, %g)\n",x,y,z);
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}else if(floats_read != 0)
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{
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printf("ERROR: unrecognized format...\n");
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return false;
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}
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}
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// Read lines until seeing "coordIndex ["
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// treat other lines in file as "comments"
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still_comments = true;
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needle = string("coordIndex [");
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while(still_comments)
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{
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fgets(line,1000,wrl_file);
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haystack = string(line);
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still_comments = string::npos == haystack.find(needle);
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}
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// read F
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int ints_read = 1;
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while(ints_read > 0)
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{
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// read new face indices (until hit -1)
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vector<Index > face;
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while(true)
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{
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// indices are 0-indexed
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int i;
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ints_read = fscanf(wrl_file," %d,",&i);
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if(ints_read > 0)
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{
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if(i>=0)
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{
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face.push_back(i);
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}else
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{
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F.push_back(face);
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break;
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}
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}else
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{
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break;
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}
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}
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}
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fclose(wrl_file);
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return true;
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}
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#ifdef IGL_STATIC_LIBRARY
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// Explicit template instantiation
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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> > > >&);
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#endif
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