You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
245 lines
9.9 KiB
245 lines
9.9 KiB
// 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 "readMESH.h"
|
|
#include <Eigen/Core>
|
|
|
|
|
|
template <typename DerivedV, typename DerivedF, typename DerivedT>
|
|
IGL_INLINE bool igl::readMESH(
|
|
const std::string mesh_file_name,
|
|
Eigen::PlainObjectBase<DerivedV>& V,
|
|
Eigen::PlainObjectBase<DerivedT>& T,
|
|
Eigen::PlainObjectBase<DerivedF>& F)
|
|
{
|
|
using namespace std;
|
|
FILE * mesh_file = fopen(mesh_file_name.c_str(),"r");
|
|
if(NULL==mesh_file)
|
|
{
|
|
fprintf(stderr,"IOError: %s could not be opened...",mesh_file_name.c_str());
|
|
return false;
|
|
}
|
|
return readMESH(mesh_file,V,T,F);
|
|
}
|
|
|
|
template <typename DerivedV, typename DerivedF, typename DerivedT>
|
|
IGL_INLINE bool igl::readMESH(
|
|
FILE * mesh_file,
|
|
Eigen::PlainObjectBase<DerivedV>& V,
|
|
Eigen::PlainObjectBase<DerivedT>& T,
|
|
Eigen::PlainObjectBase<DerivedF>& F)
|
|
{
|
|
using namespace std;
|
|
#ifndef LINE_MAX
|
|
# define LINE_MAX 2048
|
|
#endif
|
|
char line[LINE_MAX];
|
|
|
|
// eat comments at beginning of file
|
|
const auto eat_comments = [&]()->bool
|
|
{
|
|
bool still_comments= true;
|
|
bool has_line = false;
|
|
|
|
const auto is_comment_line = [&](char * line)->bool
|
|
{
|
|
if(line[0] == '#' || line[0] == '\n' || line[0] == '\r')
|
|
{
|
|
return true;
|
|
}
|
|
// or if line is all whitespace
|
|
for(int i = 0;i<LINE_MAX;i++)
|
|
{
|
|
if(line[i] == '\0')
|
|
{
|
|
return true;
|
|
}
|
|
if(!isspace(line[i]))
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
return false;
|
|
};
|
|
|
|
while(still_comments)
|
|
{
|
|
has_line = fgets(line,LINE_MAX,mesh_file) != NULL;
|
|
|
|
still_comments = has_line && is_comment_line(line);
|
|
}
|
|
return has_line;
|
|
};
|
|
eat_comments();
|
|
|
|
char str[LINE_MAX];
|
|
sscanf(line," %s",str);
|
|
// check that first word is MeshVersionFormatted
|
|
if(0!=strcmp(str,"MeshVersionFormatted"))
|
|
{
|
|
fprintf(stderr,
|
|
"Error: first word should be MeshVersionFormatted not %s\n",str);
|
|
fclose(mesh_file);
|
|
return false;
|
|
}
|
|
int version = -1;
|
|
if(2 != sscanf(line,"%s %d",str,&version)) { fscanf(mesh_file," %d",&version); }
|
|
if(version != 1 && version != 2)
|
|
{
|
|
fprintf(stderr,"Error: second word should be 1 or 2 not %d\n",version);
|
|
fclose(mesh_file);
|
|
return false;
|
|
}
|
|
|
|
while(eat_comments())
|
|
{
|
|
sscanf(line," %s",str);
|
|
int extra;
|
|
// check that third word is Dimension
|
|
if(0==strcmp(str,"Dimension"))
|
|
{
|
|
int three = -1;
|
|
if(2 != sscanf(line,"%s %d",str,&three))
|
|
{
|
|
// 1 appears on next line?
|
|
fscanf(mesh_file," %d",&three);
|
|
}
|
|
if(three != 3)
|
|
{
|
|
fprintf(stderr,"Error: only Dimension 3 supported not %d\n",three);
|
|
fclose(mesh_file);
|
|
return false;
|
|
}
|
|
}else if(0==strcmp(str,"Vertices"))
|
|
{
|
|
int number_of_vertices;
|
|
if(1 != fscanf(mesh_file," %d",&number_of_vertices) || number_of_vertices > 1000000000)
|
|
{
|
|
fprintf(stderr,"Error: expecting number of vertices less than 10^9...\n");
|
|
fclose(mesh_file);
|
|
return false;
|
|
}
|
|
// allocate space for vertices
|
|
V.resize(number_of_vertices,3);
|
|
for(int i = 0;i<number_of_vertices;i++)
|
|
{
|
|
double x,y,z;
|
|
if(4 != fscanf(mesh_file," %lg %lg %lg %d",&x,&y,&z,&extra))
|
|
{
|
|
fprintf(stderr,"Error: expecting vertex position...\n");
|
|
fclose(mesh_file);
|
|
return false;
|
|
}
|
|
V(i,0) = x;
|
|
V(i,1) = y;
|
|
V(i,2) = z;
|
|
}
|
|
}else if(0==strcmp(str,"Triangles"))
|
|
{
|
|
int number_of_triangles;
|
|
if(1 != fscanf(mesh_file," %d",&number_of_triangles))
|
|
{
|
|
fprintf(stderr,"Error: expecting number of triangles...\n");
|
|
fclose(mesh_file);
|
|
return false;
|
|
}
|
|
// allocate space for triangles
|
|
F.resize(number_of_triangles,3);
|
|
// triangle indices
|
|
int tri[3];
|
|
for(int i = 0;i<number_of_triangles;i++)
|
|
{
|
|
if(4 != fscanf(mesh_file," %d %d %d %d",&tri[0],&tri[1],&tri[2],&extra))
|
|
{
|
|
printf("Error: expecting triangle indices...\n");
|
|
return false;
|
|
}
|
|
for(int j = 0;j<3;j++)
|
|
{
|
|
F(i,j) = tri[j]-1;
|
|
}
|
|
}
|
|
}else if(0==strcmp(str,"Tetrahedra"))
|
|
{
|
|
int number_of_tetrahedra;
|
|
if(1 != fscanf(mesh_file," %d",&number_of_tetrahedra))
|
|
{
|
|
fprintf(stderr,"Error: expecting number of tetrahedra...\n");
|
|
fclose(mesh_file);
|
|
return false;
|
|
}
|
|
// allocate space for tetrahedra
|
|
T.resize(number_of_tetrahedra,4);
|
|
// tet indices
|
|
int a,b,c,d;
|
|
for(int i = 0;i<number_of_tetrahedra;i++)
|
|
{
|
|
if(5 != fscanf(mesh_file," %d %d %d %d %d",&a,&b,&c,&d,&extra))
|
|
{
|
|
fprintf(stderr,"Error: expecting tetrahedra indices...\n");
|
|
fclose(mesh_file);
|
|
return false;
|
|
}
|
|
T(i,0) = a-1;
|
|
T(i,1) = b-1;
|
|
T(i,2) = c-1;
|
|
T(i,3) = d-1;
|
|
}
|
|
}else if(0==strcmp(str,"Edges"))
|
|
{
|
|
int number_of_edges;
|
|
if(1 != fscanf(mesh_file," %d",&number_of_edges))
|
|
{
|
|
fprintf(stderr,"Error: expecting number of edges...\n");
|
|
fclose(mesh_file);
|
|
return false;
|
|
}
|
|
// allocate space for tetrahedra
|
|
Eigen::MatrixXi E(number_of_edges,2);
|
|
// tet indices
|
|
int a,b;
|
|
for(int i = 0;i<number_of_edges;i++)
|
|
{
|
|
if(3 != fscanf(mesh_file," %d %d %d",&a,&b,&extra))
|
|
{
|
|
fprintf(stderr,"Error: expecting tetrahedra indices...\n");
|
|
fclose(mesh_file);
|
|
return false;
|
|
}
|
|
E(i,0) = a-1;
|
|
E(i,1) = b-1;
|
|
}
|
|
}else if(0==strcmp(str,"End"))
|
|
{
|
|
break;
|
|
}else
|
|
{
|
|
fprintf(stderr,"Error: expecting "
|
|
"Dimension|Triangles|Vertices|Tetrahedra|Edges instead of %s...\n",str);
|
|
fclose(mesh_file);
|
|
return false;
|
|
}
|
|
}
|
|
|
|
fclose(mesh_file);
|
|
return true;
|
|
}
|
|
|
|
#ifdef IGL_STATIC_LIBRARY
|
|
// Explicit template instantiation
|
|
// generated by autoexplicit.sh
|
|
template bool igl::readMESH<Eigen::Matrix<double, -1, 3, 1, -1, 3>, Eigen::Matrix<int, -1, -1, 0, -1, -1>, Eigen::Matrix<int, -1, -1, 0, -1, -1> >(FILE*, Eigen::PlainObjectBase<Eigen::Matrix<double, -1, 3, 1, -1, 3> >&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, -1, 0, -1, -1> >&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, -1, 0, -1, -1> >&);
|
|
template bool igl::readMESH<Eigen::Matrix<double, -1, -1, 0, -1, -1>, Eigen::Matrix<int, -1, -1, 0, -1, -1>, Eigen::Matrix<int, -1, -1, 0, -1, -1> >(std::basic_string<char, std::char_traits<char>, std::allocator<char> >, Eigen::PlainObjectBase<Eigen::Matrix<double, -1, -1, 0, -1, -1> >&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, -1, 0, -1, -1> >&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, -1, 0, -1, -1> >&);
|
|
template bool igl::readMESH<Eigen::Matrix<double, -1, -1, 1, -1, -1>, Eigen::Matrix<int, -1, -1, 0, -1, -1>, Eigen::Matrix<int, -1, -1, 0, -1, -1> >(std::basic_string<char, std::char_traits<char>, std::allocator<char> >, Eigen::PlainObjectBase<Eigen::Matrix<double, -1, -1, 1, -1, -1> >&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, -1, 0, -1, -1> >&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, -1, 0, -1, -1> >&);
|
|
template bool igl::readMESH<Eigen::Matrix<double, -1, 3, 0, -1, 3>, Eigen::Matrix<int, -1, 3, 0, -1, 3>, Eigen::Matrix<int, -1, -1, 0, -1, -1> >(std::basic_string<char, std::char_traits<char>, std::allocator<char> >, Eigen::PlainObjectBase<Eigen::Matrix<double, -1, 3, 0, -1, 3> >&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, -1, 0, -1, -1> >&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, 3, 0, -1, 3> >&);
|
|
template bool igl::readMESH<Eigen::Matrix<double, -1, 3, 1, -1, 3>, Eigen::Matrix<int, -1, 3, 1, -1, 3>, Eigen::Matrix<int, -1, -1, 0, -1, -1> >(std::basic_string<char, std::char_traits<char>, std::allocator<char> >, Eigen::PlainObjectBase<Eigen::Matrix<double, -1, 3, 1, -1, 3> >&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, -1, 0, -1, -1> >&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, 3, 1, -1, 3> >&);
|
|
template bool igl::readMESH<Eigen::Matrix<float, -1, -1, 0, -1, -1>, Eigen::Matrix<int, -1, -1, 0, -1, -1>, Eigen::Matrix<int, -1, -1, 0, -1, -1> >(FILE*, Eigen::PlainObjectBase<Eigen::Matrix<float, -1, -1, 0, -1, -1> >&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, -1, 0, -1, -1> >&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, -1, 0, -1, -1> >&);
|
|
template bool igl::readMESH<Eigen::Matrix<float, -1, 3, 0, -1, 3>, Eigen::Matrix<int, -1, 3, 0, -1, 3>, Eigen::Matrix<int, -1, -1, 0, -1, -1> >(FILE*, Eigen::PlainObjectBase<Eigen::Matrix<float, -1, 3, 0, -1, 3> >&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, -1, 0, -1, -1> >&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, 3, 0, -1, 3> >&);
|
|
template bool igl::readMESH<Eigen::Matrix<float, -1, 3, 1, -1, 3>, Eigen::Matrix<int, -1, -1, 0, -1, -1>, Eigen::Matrix<int, -1, -1, 0, -1, -1> >(FILE*, Eigen::PlainObjectBase<Eigen::Matrix<float, -1, 3, 1, -1, 3> >&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, -1, 0, -1, -1> >&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, -1, 0, -1, -1> >&);
|
|
template bool igl::readMESH<Eigen::Matrix<float, -1, 3, 1, -1, 3>, Eigen::Matrix<int, -1, 3, 1, -1, 3>, Eigen::Matrix<int, -1, -1, 0, -1, -1> >(FILE*, Eigen::PlainObjectBase<Eigen::Matrix<float, -1, 3, 1, -1, 3> >&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, -1, 0, -1, -1> >&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, 3, 1, -1, 3> >&);
|
|
template bool igl::readMESH<Eigen::Matrix<float, -1, 3, 1, -1, 3>, Eigen::Matrix<unsigned int, -1, 3, 1, -1, 3>, Eigen::Matrix<int, -1, -1, 0, -1, -1> >(std::basic_string<char, std::char_traits<char>, std::allocator<char> >, Eigen::PlainObjectBase<Eigen::Matrix<float, -1, 3, 1, -1, 3> >&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, -1, 0, -1, -1> >&, Eigen::PlainObjectBase<Eigen::Matrix<unsigned int, -1, 3, 1, -1, 3> >&);
|
|
#endif
|
|
|