302 lines
8.7 KiB
C++
302 lines
8.7 KiB
C++
/****************************************************************************
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* VCGLib o o *
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* Visual and Computer Graphics Library o o *
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* _ O _ *
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* Copyright(C) 2004-2016 \/)\/ *
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* Visual Computing Lab /\/| *
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* ISTI - Italian National Research Council | *
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* \ *
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* All rights reserved. *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License (http://www.gnu.org/licenses/gpl.txt) *
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* for more details. *
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* *
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****************************************************************************/
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/* This code has been adapted from the OFF importer and Gael's GTS loader from Expe */
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#ifndef __VCGLIB_IMPORT_GTS
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#define __VCGLIB_IMPORT_GTS
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#include <fstream>
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#include <string>
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#include <vector>
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#include <assert.h>
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#include <vcg/space/color4.h>
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#include <wrap/callback.h>
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#include <wrap/io_trimesh/io_mask.h>
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namespace vcg
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{
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namespace tri
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{
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namespace io
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{
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// /** \addtogroup */
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// /* @{ */
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/**
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This class encapsulate a filter for importing GTS meshes.
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The GTS file format of the GNU Triangulated Surface library http://gts.sourceforge.net/
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*/
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template<class MESH_TYPE>
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class ImporterGTS
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{
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public:
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typedef typename MESH_TYPE::VertexType VertexType;
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typedef typename MESH_TYPE::VertexIterator VertexIterator;
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typedef typename MESH_TYPE::VertexPointer VertexPointer;
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typedef typename MESH_TYPE::FaceType FaceType;
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typedef typename MESH_TYPE::FaceIterator FaceIterator;
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typedef typename MESH_TYPE::FacePointer FacePointer;
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typedef typename MESH_TYPE::CoordType CoordType;
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typedef typename MESH_TYPE::ScalarType ScalarType;
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enum GTSCodes {NoError=0, CantOpen, InvalidFile,
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UnsupportedFormat, ErrorNotTriangularFace};
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struct Options
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{
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Options()
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: onlyMaskFlag(false), onlyPoints(false), flipFaces(false)
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{}
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bool onlyMaskFlag;
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bool onlyPoints;
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bool flipFaces;
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};
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/*!
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* Standard call for knowing the meaning of an error code
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* \param message_code The code returned by <CODE>Open</CODE>
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* \return The string describing the error code
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*/
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static const char* ErrorMsg(int message_code)
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{
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static const char* error_msg[] =
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{
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"No errors", "Can't open file", "Invalid file",
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"Unsupported format", "Face with more than 3 vertices"
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};
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if(message_code>4 || message_code<0)
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return "Unknown error";
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else
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return error_msg[message_code];
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};
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/**
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* Load only the properties of the 3D objects.
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*
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* \param filename the name of the file to read from
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* \param loadmask the mask which encodes the properties
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* \return the operation result
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*/
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static bool LoadMask(const char *filename, int &loadmask)
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{
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// To obtain the loading mask all the file must be parsed
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// to distinguish between per-vertex and per-face color attribute.
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loadmask=0;
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MESH_TYPE dummyMesh;
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return (Open(dummyMesh, filename, loadmask,0,true)==NoError);
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}
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static int Open(MESH_TYPE &mesh, const char *filename, CallBackPos *cb=0)
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{
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int loadmask;
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return Open(mesh,filename,loadmask,cb);
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}
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/*!
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* Standard call for reading a mesh.
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*
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* \param mesh the destination mesh
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* \param filename the name of the file to read from
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* \return the operation result
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*/
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static int Open(MESH_TYPE &mesh, const char *filename, int &loadmask,
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CallBackPos *cb=0, bool onlyMaskFlag=false)
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{
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Options opt;
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opt.onlyMaskFlag = onlyMaskFlag;
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return Open(mesh, filename, loadmask, opt, cb);
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}
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static int Open(MESH_TYPE &mesh, const char *filename, int &loadmask,
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const Options& options, CallBackPos *cb=0)
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{
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QFile device(filename);
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if ( (!device.open(QFile::ReadOnly)) )
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return CantOpen;
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QTextStream stream(&device);
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loadmask = Mask::IOM_VERTCOORD | Mask::IOM_FACEINDEX;
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int nofVertices, nofFaces, nofEdges;
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int id0, id1, id2;
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int eid0, eid1, eid2;
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typename MESH_TYPE::CoordType v;
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QString line;
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QStringList sa;
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bool done = false;
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do
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{
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line = stream.readLine();
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line = line.trimmed();
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sa = line.split(' ');
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if ((!line.startsWith("#")) && (sa.size()>=3))
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{
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nofVertices = sa[0].toInt();
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nofEdges = sa[1].toInt();
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nofFaces = sa[2].toInt();
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done = true;
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}
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} while (!done);
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if(options.onlyMaskFlag) return NoError;
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int total = nofVertices + nofEdges + nofFaces;
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std::cerr << "GtsMeshReader::nofVertices = " << nofVertices << std::endl;
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std::cerr << "GtsMeshReader::nofEdges = " << nofEdges << std::endl;
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std::cerr << "GtsMeshReader::nofFaces = " << nofFaces << std::endl;
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mesh.Clear();
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VertexIterator v_iter = Allocator<MESH_TYPE>::AddVertices(mesh, nofVertices);
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for(int i=0 ; i<nofVertices ;)
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{
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if (cb && (i%1000)==0)
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cb(i/total, "Vertex Loading");
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line = stream.readLine().trimmed();
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if (line.startsWith("#"))
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{
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continue;
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}
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sa = line.split(' ');
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if (!sa.size()>=3)
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{
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std::cerr << "Error parsing vertex " << line.toLocal8Bit().data() << "\n";
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return InvalidFile;
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}
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v.X() = sa[0].toDouble();
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v.Y() = sa[1].toDouble();
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v.Z() = sa[2].toDouble();
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(*v_iter).P() = v;
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++v_iter;
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i++;
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}
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// load edges
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std::vector< std::pair<int,int> > edges;
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for(int i=0 ; i<nofEdges ; ++i)
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{
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if (cb && (i%1000)==0)
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cb((i+nofVertices)/total, "Edge Loading");
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line = stream.readLine();
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if (line.startsWith("#"))
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{
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continue;
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}
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sa = line.split(' ');
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if (!sa.size()>=2)
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{
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std::cerr << "Error parsing edge " << line.toLocal8Bit().data() << "\n";
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return InvalidFile;
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}
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id0 = sa[0].toInt();
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id1 = sa[1].toInt();
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edges.push_back(std::pair<int,int>(id0-1,id1-1));
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}
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// load faces
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Allocator<MESH_TYPE>::AddFaces(mesh, nofFaces);
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for(int i=0 ; i<nofFaces ; )
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{
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if (cb && (i%1000)==0)
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cb((nofVertices+nofEdges+i)/total, "Face Loading");
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line = stream.readLine();
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if (line.startsWith("#"))
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{
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continue;
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}
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sa = line.split(' ');
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if (!sa.size()>=3)
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{
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std::cerr << "Error parsing face " << line.toLocal8Bit().data() << "\n";
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return InvalidFile;
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}
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eid0 = sa[0].toInt();
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eid1 = sa[1].toInt();
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eid2 = sa[2].toInt();
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int e11 = edges[eid0-1].first;
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int e12 = edges[eid0-1].second;
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int e21 = edges[eid1-1].first;
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int e22 = edges[eid1-1].second;
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if (e12 == e21) {
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id0 = e11;
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id1 = e12;
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id2 = e22;
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}
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else if (e12 == e22) {
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id0 = e11;
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id1 = e12;
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id2 = e21;
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}
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else if (e11 == e21) {
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id0 = e12;
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id1 = e11;
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id2 = e22;
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}
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else {
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id0 = e12;
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id1 = e11;
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id2 = e21;
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}
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if (options.flipFaces)
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{
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mesh.face[i].V(0) = &(mesh.vert[id0]);
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mesh.face[i].V(1) = &(mesh.vert[id2]);
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mesh.face[i].V(2) = &(mesh.vert[id1]);
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}
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else
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{
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mesh.face[i].V(0) = &(mesh.vert[id0]);
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mesh.face[i].V(1) = &(mesh.vert[id1]);
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mesh.face[i].V(2) = &(mesh.vert[id2]);
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}
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++i;
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}
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return NoError;
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} // end Open
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protected:
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};
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// /*! @} */
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} //namespace io
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}//namespace tri
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} // namespace vcg
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#endif //__VCGLIB_IMPORT_GTS
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