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#include <iostream>
#include <iterator>
// -------------------- OpenMesh
#include <OpenMesh/Core/IO/MeshIO.hh>
#include <OpenMesh/Core/Mesh/TriMesh_ArrayKernelT.hh>
#include <OpenMesh/Tools/Utils/getopt.h>
// ----------------------------------------------------------------------------
using namespace OpenMesh;
// ----------------------------------------------------------------------------
typedef TriMesh_ArrayKernelT<> MyMesh;
// ----------------------------------------------------------------------------
#define CHKROPT( Option ) \
std::cout << " provides " << #Option \
<< (ropt.check(IO::Options:: Option)?": yes\n":": no\n")
#define CHKWOPT( Option ) \
std::cout << " write " << #Option \
<< (wopt.check(IO::Options:: Option)?": yes\n":": no\n")
#define MESHOPT( msg, tf ) \
std::cout << " " << msg << ": " << ((tf)?"yes\n":"no\n")
// ----------------------------------------------------------------------------
void parse_commandline( int _argc, char **_argv, MyMesh& _mesh,
IO::Options &ropt, IO::Options &wopt );
void usage_and_exit(int xcode);
// ----------------------------------------------------------------------------
int main(int argc, char **argv)
{
MyMesh mesh;
IO::Options ropt, wopt;
// -------------------- evaluate commandline
parse_commandline( argc, argv, mesh, ropt, wopt );
// -------------------- read mesh
if ( ! IO::read_mesh(mesh,argv[optind], ropt))
{
std::cerr << "Error loading mesh from file " << argv[optind] << std::endl;
return 1;
}
// -------------------- show options
std::cout << "File " << argv[optind] << std::endl;
std::cout << " is binary: "
<< (ropt.check(IO::Options::Binary) ? " yes\n" : " no\n");
std::cout << " byte order: ";
if (ropt.check(IO::Options::Swap))
std::cout << "swapped\n";
else if (ropt.check(IO::Options::LSB))
std::cout << "little endian\n";
else if (ropt.check(IO::Options::MSB))
std::cout << "big endian\n";
else
std::cout << "don't care\n";
std::cout << " provides VertexNormal"
<< ( // strange layout for doxygen
ropt.check(IO::Options::VertexNormal)
? ": yes\n":": no\n");
CHKROPT( VertexColor );
CHKROPT( VertexTexCoord );
CHKROPT( FaceNormal );
CHKROPT( FaceColor );
// -------------------- mesh stats
std::cout << "# Vertices: " << mesh.n_vertices() << std::endl;
std::cout << "# Edges : " << mesh.n_faces() << std::endl;
std::cout << "# Faces : " << mesh.n_faces() << std::endl;
// -------------------- show write options
std::cout << "Selected write options:\n";
std::cout << " use binary: "
<< (wopt.check(IO::Options::Binary) ? " yes\n" : " no\n");
std::cout << " byte order: ";
if (wopt.check(IO::Options::Swap))
std::cout << "swapped\n";
else if (wopt.check(IO::Options::LSB))
std::cout << "little endian\n";
else if (wopt.check(IO::Options::MSB))
std::cout << "big endian\n";
else
std::cout << "don't care\n";
std::cout << " write VertexNormal"
<< (wopt.check(IO::Options::VertexNormal) ? ": yes\n":": no\n");
CHKWOPT( VertexColor );
CHKWOPT( VertexTexCoord );
CHKWOPT( FaceNormal );
CHKWOPT( FaceColor );
// -------------------- show mesh capabilities
std::cout << "Mesh supports\n";
MESHOPT("vertex normals", mesh.has_vertex_normals());
MESHOPT("vertex colors", mesh.has_vertex_colors());
MESHOPT("texcoords", mesh.has_vertex_texcoords2D());
MESHOPT("face normals", mesh.has_face_normals());
MESHOPT("face colors", mesh.has_face_colors());
// -------------------- write mesh
std::cout << "Write mesh to " << argv[optind+1] << "..";
if ( !IO::write_mesh( mesh, argv[optind+1], wopt ) )
{
std::cerr << "Error" << std::endl;
std::cerr << "Possible reasons:\n";
std::cerr << "1. Chosen format cannot handle an option!\n";
std::cerr << "2. Mesh does not provide necessary information!\n";
std::cerr << "3. Or simply cannot open file for writing!\n";
return 1;
}
else
std::cout << "Ok.\n";
return 0;
}
// ----------------------------------------------------------------------------
void parse_commandline( int _argc, char **_argv, MyMesh& _mesh,
IO::Options &ropt, IO::Options &wopt )
{
int c;
while ((c=getopt(_argc, _argv, "bhsBF:LMSV:X:"))!=-1)
{
switch(c)
{
// -------------------- read options
// force binary input
case 'b':
ropt += IO::Options::Binary;
break;
// force swapping the byte order, when reading a binary file
case 's':
ropt += IO::Options::Swap;
break;
// -------------------- write options
// Write binary variant of format if possible
case 'B':
wopt += IO::Options::Binary;
break;
//
case 'F':
for(size_t i=0; optarg[i]; ++i)
switch(optarg[i]) {
case 'n' : wopt += IO::Options::FaceNormal; break;
case 'c' : wopt += IO::Options::FaceColor; break;
}
break;
// Use little endian when writing binary data
case 'L':
wopt += IO::Options::LSB;
break;
// Use big endian when writing binary data
case 'M':
wopt += IO::Options::MSB;
break;
// Swap byte order when writing binary data
case 'S':
wopt += IO::Options::Swap;
break;
//
case 'V':
{
for(size_t i=0; optarg[i]; ++i)
switch(optarg[i]) {
case 'n' : // dont't change layout!!
wopt += IO::Options::VertexNormal;
break;
case 't' : wopt += IO::Options::VertexTexCoord; break;
case 'c' : wopt += IO::Options::VertexColor; break;
}
break;
}
// -------------------- request mesh' standard properties
case 'X':
{
char entity='\0';
for(size_t i=0; optarg[i]; ++i)
switch(optarg[i]) {
case 'v':
case 'f': entity = optarg[i]; break;
case 'n':
switch(entity) {
case 'v': _mesh.request_vertex_normals(); break;
case 'f': _mesh.request_face_normals(); break;
}
break;
case 'c':
switch(entity) {
case 'v': _mesh.request_vertex_colors(); break;
case 'f': _mesh.request_face_colors(); break;
}
break;
case 't':
switch(entity) {
case 'v': _mesh.request_vertex_texcoords2D(); break;
}
break;
}
break;
}
// -------------------- help
case 'h':
usage_and_exit(0);
default:
usage_and_exit(1);
}
}
if ( _argc-optind != 2)
usage_and_exit(1);
}
// ----------------------------------------------------------------------------
void usage_and_exit(int xcode)
{
std::ostream &os = xcode ? std::cerr : std::cout;
os << "Usage: io_options [Options] <input> <output>\n"
<< std::endl;
os << " Read and write a mesh, using OpenMesh::IO::Options\n"
<< std::endl;
os << "Options:\n"
<< std::endl;
os << "a) read options\n"
<< std::endl
<< " -b\n"
<< "\tAssume input file is a binary file\n"
<< std::endl
<< " -s\n"
<< "\tSwap byte order when reading a binary file!\n"
<< std::endl;
os << "b) write options\n"
<< std::endl
<< " -B\n"
<< "\tWrite binary data\n"
<< std::endl
<< " -S\n"
<< "\tSwap byte order, when writing binary data\n"
<< std::endl
<< " -M/-L\n"
<< "\tUse MSB/LSB byte ordering, when writing binary data\n"
<< std::endl
<< " -V{n|t|c}\n"
<< "\tWrite vertex normals, texcoords, and/or colors\n"
<< std::endl
<< " -F{n|c}\n"
<< "\tWrite face normals, and/or colors\n"
<< std::endl;
os << "c) Mesh properties\n"
<< std::endl
<< " -Xv{n|c|t}\n"
<< "\tRequest vertex property normals|colors|texcoords\n"
<< std::endl
<< " -Xf{n|c}\n"
<< "\tRequest face property normals|colors\n"
<< std::endl;
exit(xcode);
}
// end of file
// ============================================================================
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