/****************************************************************************
* VCGLib o o *
* Visual and Computer Graphics Library o o *
* _ O _ *
* Copyright(C) 2004 \/)\/ *
* Visual Computing Lab /\/| *
* ISTI - Italian National Research Council | *
* \ *
* All rights reserved. *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License (http://www.gnu.org/licenses/gpl.txt) *
* for more details. *
* *
****************************************************************************/
/* This code has been adapted from the OFF importer and Gael's GTS loader from Expe */
#ifndef __VCGLIB_IMPORT_GTS
#define __VCGLIB_IMPORT_GTS
#include <fstream>
#include <string>
#include <vector>
#include <assert.h>
#include <vcg/space/color4.h>
#include <wrap/callback.h>
#include <wrap/io_trimesh/io_mask.h>
namespace vcg
{
namespace tri
{
namespace io
{
// /** \addtogroup */
// /* @{ */
/**
This class encapsulate a filter for importing GTS meshes.
The GTS file format of the GNU Triangulated Surface library http://gts.sourceforge.net/
*/
template<class MESH_TYPE>
class ImporterGTS
{
public:
typedef typename MESH_TYPE::VertexType VertexType;
typedef typename MESH_TYPE::VertexIterator VertexIterator;
typedef typename MESH_TYPE::VertexPointer VertexPointer;
typedef typename MESH_TYPE::FaceType FaceType;
typedef typename MESH_TYPE::FaceIterator FaceIterator;
typedef typename MESH_TYPE::FacePointer FacePointer;
typedef typename MESH_TYPE::CoordType CoordType;
typedef typename MESH_TYPE::ScalarType ScalarType;
enum GTSCodes {NoError=0, CantOpen, InvalidFile,
UnsupportedFormat, ErrorNotTriangularFace};
struct Options
{
Options()
: onlyMaskFlag(false), onlyPoints(false), flipFaces(false)
{}
bool onlyMaskFlag;
bool onlyPoints;
bool flipFaces;
};
/*!
* Standard call for knowing the meaning of an error code
* \param message_code The code returned by <CODE>Open</CODE>
* \return The string describing the error code
*/
static const char* ErrorMsg(int message_code)
{
static const char* error_msg[] =
{
"No errors", "Can't open file", "Invalid file",
"Unsupported format", "Face with more than 3 vertices"
};
if(message_code>4 || message_code<0)
return "Unknown error";
else
return error_msg[message_code];
};
/**
* Load only the properties of the 3D objects.
*
* \param filename the name of the file to read from
* \param loadmask the mask which encodes the properties
* \return the operation result
*/
static bool LoadMask(const char *filename, int &loadmask)
{
// To obtain the loading mask all the file must be parsed
// to distinguish between per-vertex and per-face color attribute.
loadmask=0;
MESH_TYPE dummyMesh;
return (Open(dummyMesh, filename, loadmask,0,true)==NoError);
}
static int Open(MESH_TYPE &mesh, const char *filename, CallBackPos *cb=0)
{
int loadmask;
return Open(mesh,filename,loadmask,cb);
}
/*!
* Standard call for reading a mesh.
*
* \param mesh the destination mesh
* \param filename the name of the file to read from
* \return the operation result
*/
static int Open(MESH_TYPE &mesh, const char *filename, int &loadmask,
CallBackPos *cb=0, bool onlyMaskFlag=false)
{
Options opt;
opt.onlyMaskFlag = onlyMaskFlag;
return Open(mesh, filename, loadmask, opt, cb);
}
static int Open(MESH_TYPE &mesh, const char *filename, int &loadmask,
const Options& options, CallBackPos *cb=0)
{
QFile device(filename);
if ( (!device.open(QFile::ReadOnly)) )
return CantOpen;
QTextStream stream(&device);
loadmask = Mask::IOM_VERTCOORD | Mask::IOM_FACEINDEX;
int nofVertices, nofFaces, nofEdges;
int id0, id1, id2;
int eid0, eid1, eid2;
Point3f v;
QString line;
QStringList sa;
bool done = false;
do
{
line = stream.readLine();
line = line.trimmed();
sa = line.split(' ');
if ((!line.startsWith("#")) && (sa.size()>=3))
{
nofVertices = sa[0].toInt();
nofEdges = sa[1].toInt();
nofFaces = sa[2].toInt();
done = true;
}
} while (!done);
if(options.onlyMaskFlag) return NoError;
int total = nofVertices + nofEdges + nofFaces;
std::cerr << "GtsMeshReader::nofVertices = " << nofVertices << std::endl;
std::cerr << "GtsMeshReader::nofEdges = " << nofEdges << std::endl;
std::cerr << "GtsMeshReader::nofFaces = " << nofFaces << std::endl;
mesh.Clear();
VertexIterator v_iter = Allocator<MESH_TYPE>::AddVertices(mesh, nofVertices);
for(int i=0 ; i<nofVertices ;)
{
if (cb && (i%1000)==0)
cb(i/total, "Vertex Loading");
line = stream.readLine().trimmed();
if (line.startsWith("#"))
{
continue;
}
sa = line.split(' ');
if (!sa.size()>=3)
{
std::cerr << "Error parsing vertex " << line.toLocal8Bit().data() << "\n";
return InvalidFile;
}
v.X() = sa[0].toDouble();
v.Y() = sa[1].toDouble();
v.Z() = sa[2].toDouble();
(*v_iter).P() = v;
++v_iter;
i++;
}
// load edges
std::vector< std::pair<int,int> > edges;
for(int i=0 ; i<nofEdges ; ++i)
{
if (cb && (i%1000)==0)
cb((i+nofVertices)/total, "Edge Loading");
line = stream.readLine();
if (line.startsWith("#"))
{
continue;
}
sa = line.split(' ');
if (!sa.size()>=2)
{
std::cerr << "Error parsing edge " << line.toLocal8Bit().data() << "\n";
return InvalidFile;
}
id0 = sa[0].toInt();
id1 = sa[1].toInt();
edges.push_back(std::pair<int,int>(id0-1,id1-1));
}
// load faces
Allocator<MESH_TYPE>::AddFaces(mesh, nofFaces);
for(int i=0 ; i<nofFaces ; )
{
if (cb && (i%1000)==0)
cb((nofVertices+nofEdges+i)/total, "Face Loading");
line = stream.readLine();
if (line.startsWith("#"))
{
continue;
}
sa = line.split(' ');
if (!sa.size()>=3)
{
std::cerr << "Error parsing face " << line.toLocal8Bit().data() << "\n";
return InvalidFile;
}
eid0 = sa[0].toInt();
eid1 = sa[1].toInt();
eid2 = sa[2].toInt();
int e11 = edges[eid0-1].first;
int e12 = edges[eid0-1].second;
int e21 = edges[eid1-1].first;
int e22 = edges[eid1-1].second;
if (e12 == e21) {
id0 = e11;
id1 = e12;
id2 = e22;
}
else if (e12 == e22) {
id0 = e11;
id1 = e12;
id2 = e21;
}
else if (e11 == e21) {
id0 = e12;
id1 = e11;
id2 = e22;
}
else {
id0 = e12;
id1 = e11;
id2 = e21;
}
if (options.flipFaces)
{
mesh.face[i].V(0) = &(mesh.vert[id0]);
mesh.face[i].V(1) = &(mesh.vert[id2]);
mesh.face[i].V(2) = &(mesh.vert[id1]);
}
else
{
mesh.face[i].V(0) = &(mesh.vert[id0]);
mesh.face[i].V(1) = &(mesh.vert[id1]);
mesh.face[i].V(2) = &(mesh.vert[id2]);
}
++i;
}
return NoError;
} // end Open
protected:
};
// /*! @} */
} //namespace io
}//namespace tri
} // namespace vcg
#endif //__VCGLIB_IMPORT_GTS