glc_objtoworld.cpp

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/****************************************************************************

 This file is part of the GLC-lib library.
 Copyright (C) 2005-2008 Laurent Ribon (laumaya@users.sourceforge.net)
 Version 1.2.0, packaged on September 2009.

 http://glc-lib.sourceforge.net

 GLC-lib 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.

 GLC-lib 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 for more details.

 You should have received a copy of the GNU General Public License
 along with GLC-lib; if not, write to the Free Software
 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA

*****************************************************************************/



#include "glc_objtoworld.h"
#include "../sceneGraph/glc_world.h"
#include "glc_objmtlloader.h"
#include "../glc_fileformatexception.h"
#include "../geometry/glc_geomtools.h"
#include "../sceneGraph/glc_structreference.h"
#include "../sceneGraph/glc_structinstance.h"
#include "../sceneGraph/glc_structoccurence.h"
#include <QTextStream>
#include <QFileInfo>
#include <QGLContext>

// Constructor
GLC_ObjToWorld::GLC_ObjToWorld(const QGLContext *pContext)
: m_pWorld(NULL)
, m_FileName()
, m_pQGLContext(pContext)
, m_pMtlLoader(NULL)
, m_CurrentLineNumber(0)
, m_pCurrentObjMesh(NULL)
, m_FaceType(notSet)
, m_CurrentMeshMaterials()
, m_CurrentMaterialName("GLC_Default")
, m_ListOfAttachedFileName()
, m_Positions()
, m_Normals()
, m_Texels()
{
}

GLC_ObjToWorld::~GLC_ObjToWorld()
{
        clear();
}

// Set Functions

// Create an GLC_World from an input OBJ File
GLC_World* GLC_ObjToWorld::CreateWorldFromObj(QFile &file)
{
        m_ListOfAttachedFileName.clear();
        m_FileName= file.fileName();
        // Test if the file exist and can be opened
        if (!file.open(QIODevice::ReadOnly))
        {
                QString message(QString("GLC_ObjToWorld::CreateWorldFromObj File ") + m_FileName + QString(" doesn't exist"));
                //qDebug() << message;
                GLC_FileFormatException fileFormatException(message, m_FileName, GLC_FileFormatException::FileNotFound);
                throw(fileFormatException);
        }

        // Init member
        m_pWorld= new GLC_World;

        // Create Working variables
        int currentQuantumValue= 0;
        int previousQuantumValue= 0;
        int numberOfLine= 0;

        // Create the input file stream
        QTextStream objStream(&file);

        // QString buffer
        QString lineBuff;

        QString mtlLibLine;

        // Searching mtllib attribute
        while (!objStream.atEnd() && !lineBuff.contains("mtllib"))
        {
                ++numberOfLine;
                lineBuff= objStream.readLine();
                if (lineBuff.contains("mtllib")) mtlLibLine= lineBuff;
        }

        // Count the number of lines of the OBJ file
        while (!objStream.atEnd())
        {
                ++numberOfLine;
                objStream.readLine();
        }

        // Reset the stream
        objStream.resetStatus();
        objStream.seek(0);

        // if mtl file found, load it
        QString mtlLibFileName(getMtlLibFileName(mtlLibLine));
        if (!mtlLibFileName.isEmpty())
        {
                m_pMtlLoader= new GLC_ObjMtlLoader(m_pQGLContext, mtlLibFileName);
                if (!m_pMtlLoader->loadMaterials())
                {
                        delete m_pMtlLoader;
                        m_pMtlLoader= NULL;
                        //qDebug() << "GLC_ObjToWorld::CreateWorldFromObj: Failed to load materials";
                }
                else
                {
                        // Update Attached file name list
                        m_ListOfAttachedFileName << mtlLibFileName;
                        m_ListOfAttachedFileName << m_pMtlLoader->listOfAttachedFileName();
                }
        }
        else
        {
                //qDebug() << "GLC_ObjToWorld::CreateWorldFromObj: mtl file not found";
        }

        // Read Buffer and create the world
        emit currentQuantum(currentQuantumValue);
        m_CurrentLineNumber= 0;
        while (!objStream.atEnd())
        {
                ++m_CurrentLineNumber;
                lineBuff= objStream.readLine();

                mergeLines(&lineBuff, &objStream);

                scanLigne(lineBuff);
                currentQuantumValue = static_cast<int>((static_cast<double>(m_CurrentLineNumber) / numberOfLine) * 100);
                if (currentQuantumValue > previousQuantumValue)
                {
                        emit currentQuantum(currentQuantumValue);
                }
                previousQuantumValue= currentQuantumValue;

        }
        file.close();

        addCurrentObjMeshToWorld();

        if (m_pWorld->rootOccurence()->childCount() == 0)
        {
                QString message= "GLC_ObjToWorld::CreateWorldFromObj : No mesh found!";
                GLC_FileFormatException fileFormatException(message, m_FileName, GLC_FileFormatException::NoMeshFound);
                clear();
                throw(fileFormatException);
        }
        return m_pWorld;

}

// Private services functions

// Return the name of the mtl file
QString GLC_ObjToWorld::getMtlLibFileName(QString line)
{
        // Search mtl file with the same name than the OBJ file Name
        QString mtlFileName(m_FileName);
        mtlFileName.replace(m_FileName.size() - 3, 3, "mtl");
        QFile mtlFile(mtlFileName);
        if (!mtlFile.exists())// mtl file with same name not found
        {
                QTextStream stream(&line);
                QString header;
                if ((stream >> header >> mtlFileName).status() == QTextStream::Ok)
                {
                        // If There is spaces in the string to extracts
                        QString valueString2;
                        while ((stream >> valueString2).status() == QTextStream::Ok)
                        {
                                mtlFileName.append(" ");
                                mtlFileName.append(valueString2);
                        }
                        QFileInfo fileInfo(m_FileName);
                        mtlFileName= fileInfo.absolutePath() + QDir::separator() + mtlFileName;
                }
                else
                {
                        // There is no mtl file to load
                        mtlFileName.clear();
                }
        }
        return mtlFileName;
}

// Scan a line previously extracted from OBJ file
void GLC_ObjToWorld::scanLigne(QString &line)
{
        line= line.trimmed();
        // Search Vertexs vectors
        if (line.startsWith("v ")|| line.startsWith(QString("v") + QString(QChar(9))))
        {
                line.remove(0,2); // Remove first 2 char
                m_Positions.append(extract3dVect(line));
                m_FaceType = notSet;
        }

        // Search texture coordinate vectors
        else if (line.startsWith("vt ")|| line.startsWith(QString("vt") + QString(QChar(9))))
        {
                line.remove(0,3); // Remove first 3 char
                m_Texels.append(extract2dVect(line));
                m_FaceType = notSet;
        }

        // Search normals vectors
        else if (line.startsWith("vn ") || line.startsWith(QString("vn") + QString(QChar(9))))
        {
                line.remove(0,3); // Remove first 3 char
                m_Normals.append(extract3dVect(line));
                m_FaceType = notSet;
        }

        // Search faces to update index
        else if (line.startsWith("f ") || line.startsWith(QString("f") + QString(QChar(9))))
        {
                // If there is no group or object in the OBJ file
                if (NULL == m_pCurrentObjMesh)
                        {
                                changeGroup("GLC_Default");
                                //qDebug() << "Default group " << line;
                        }
                line.remove(0,2); // Remove first 2 char
                extractFaceIndex(line);
        }

        // Search Material
        else if (line.startsWith("usemtl ") || line.startsWith(QString("usemtl") + QString(QChar(9))))
        {
                line.remove(0,7); // Remove first 7 char
                setCurrentMaterial(line);
                m_FaceType = notSet;
        }

        // Search Group
        else if (line.startsWith("g ") || line.startsWith("o ") || line.startsWith(QString("g") + QString(QChar(9)))
                        || line.startsWith(QString("o") + QString(QChar(9))))
        {
                m_FaceType = notSet;
                line.remove(0,2); // Remove first 2 char
                changeGroup(line);
        }

}
// Change current group
void GLC_ObjToWorld::changeGroup(QString line)
{
        //qDebug() << "GLC_ObjToWorld::changeGroup at Line :" << line;
        // Parse the line containing the group name
        QTextStream stream(&line);
        QString groupName;
        if ((stream >> groupName).status() == QTextStream::Ok)
        {
                // If There is an space in the string to extracts
                QString valueString2;
                while ((stream >> valueString2).status() == QTextStream::Ok)
                {
                        groupName.append(" ");
                        groupName.append(valueString2);
                }
                // If the groupName == "default" nothing to do
                if("default" != groupName)
                {
                        addCurrentObjMeshToWorld();
                        m_pCurrentObjMesh= new CurrentObjMesh(m_CurrentMaterialName);
                        m_pCurrentObjMesh->m_pMesh->setName(groupName);

                }
        }
        else
        {
                QString message= "GLC_ObjToWorld::changeGroup : something is wrong!!";
                message.append("\nAt line : ");
                message.append(QString::number(m_CurrentLineNumber));
                GLC_FileFormatException fileFormatException(message, m_FileName, GLC_FileFormatException::FileNotSupported);
                clear();
                throw(fileFormatException);
        }

}

// Extract a Vector from a string
QList<float> GLC_ObjToWorld::extract3dVect(QString &line)
{
        float x=0.0f;
        float y=0.0f;
        float z=0.0f;

        QList<float> vectResult;
        QTextStream stringVecteur(&line);

        QString xString, yString, zString;

        if (((stringVecteur >> xString >> yString >> zString).status() == QTextStream::Ok))
        {
                bool xOk, yOk, zOk;
                x= xString.toFloat(&xOk);
                y= yString.toFloat(&yOk);
                z= zString.toFloat(&zOk);
                if (!(xOk && yOk && zOk))
                {
                        QString message= "GLC_ObjToWorld::extract3dVect : failed to convert vector component to float";
                        message.append("\nAt ligne : ");
                        message.append(QString::number(m_CurrentLineNumber));
                        //qDebug() << message;
                        //GLC_FileFormatException fileFormatException(message, m_FileName);
                        //clear();
                        //throw(fileFormatException);
                }
                else
                {
                        vectResult << x << y << z;
                }
        }

        return vectResult;

}

// Extract a Vector from a string
QList<float> GLC_ObjToWorld::extract2dVect(QString &line)
{
        float x=0.0f;
        float y=0.0f;
        QList<float> vectResult;
        QTextStream stringVecteur(&line);

        QString xString, yString;

        if (((stringVecteur >> xString >> yString).status() == QTextStream::Ok))
        {
                bool xOk, yOk;
                x= xString.toFloat(&xOk);
                y= yString.toFloat(&yOk);
                if (!(xOk && yOk))
                {
                        QString message= "GLC_ObjToWorld::extract2dVect : failed to convert vector component to double";
                        message.append("\nAt ligne : ");
                        message.append(QString::number(m_CurrentLineNumber));
                        qDebug() << message;
                        GLC_FileFormatException fileFormatException(message, m_FileName, GLC_FileFormatException::WrongFileFormat);
                        clear();
                        throw(fileFormatException);
                }
                vectResult << x << y;
        }

        return vectResult;
}

// Extract a face from a string
void GLC_ObjToWorld::extractFaceIndex(QString &line)
{
        QString buff;

        int coordinateIndex;
        int normalIndex;
        int textureCoordinateIndex;

        QList<GLuint> currentFaceIndex;
        // Parse the line containing face index
        QTextStream streamFace(&line);
        while ((!streamFace.atEnd()))
        {
                streamFace >> buff;
                extractVertexIndex(buff, coordinateIndex, normalIndex, textureCoordinateIndex);

                ObjVertice currentVertice(coordinateIndex, normalIndex, textureCoordinateIndex);
                if (m_pCurrentObjMesh->m_ObjVerticeIndexMap.contains(currentVertice))
                {
                        currentFaceIndex.append(m_pCurrentObjMesh->m_ObjVerticeIndexMap.value(currentVertice));
                }
                else
                {
                        // Add Vertex to the mesh bulk data
                        m_pCurrentObjMesh->m_Positions.append(m_Positions.value(coordinateIndex * 3));
                        m_pCurrentObjMesh->m_Positions.append(m_Positions.value(coordinateIndex * 3 + 1));
                        m_pCurrentObjMesh->m_Positions.append(m_Positions.value(coordinateIndex * 3 + 2));
                        if (-1 != normalIndex)
                        {
                                // Add Normal to the mesh bulk data
                                m_pCurrentObjMesh->m_Normals.append(m_Normals.value(normalIndex * 3));
                                m_pCurrentObjMesh->m_Normals.append(m_Normals.value(normalIndex * 3 + 1));
                                m_pCurrentObjMesh->m_Normals.append(m_Normals.value(normalIndex * 3 + 2));
                        }
                        else
                        {
                                // Add Null Normal to the mesh bulk data
                                m_pCurrentObjMesh->m_Normals.append(0.0f);
                                m_pCurrentObjMesh->m_Normals.append(0.0f);
                                m_pCurrentObjMesh->m_Normals.append(0.0f);
                        }
                        if (-1 != textureCoordinateIndex)
                        {
                                // Add texture coordinate to the mesh bulk data
                                m_pCurrentObjMesh->m_Texels.append(m_Texels.value(textureCoordinateIndex * 2));
                                m_pCurrentObjMesh->m_Texels.append(m_Texels.value(textureCoordinateIndex * 2 + 1));
                        }
                        else if (not m_pCurrentObjMesh->m_Texels.isEmpty())
                        {
                                // Add epmty texture coordinate
                                m_pCurrentObjMesh->m_Texels.append(0.0f);
                                m_pCurrentObjMesh->m_Texels.append(0.0f);
                        }
                        // Add the index to current face index
                        currentFaceIndex.append(m_pCurrentObjMesh->m_NextFreeIndex);
                        // Add ObjVertice to ObjVertice Map
                        m_pCurrentObjMesh->m_ObjVerticeIndexMap.insert(currentVertice, m_pCurrentObjMesh->m_NextFreeIndex);
                        // Increment next free index
                        ++(m_pCurrentObjMesh->m_NextFreeIndex);
                }

        }
        // Check the number of face's vertex
        const int size= currentFaceIndex.size();
        if (size < 3)
        {
                //qDebug() << "GLC_ObjToWorld::extractFaceIndex Face with less than 3 vertex found";
                return;
        }
        // Add the face to the current mesh
        if ((m_FaceType == coordinateAndNormal) or (m_FaceType == coordinateAndTextureAndNormal))
        {
                if (size > 3)
                {
                        glc::triangulatePolygon(&currentFaceIndex, m_pCurrentObjMesh->m_Positions);
                }
                m_pCurrentObjMesh->m_Index.append(currentFaceIndex);
        }
        else if (m_FaceType != notSet)
        {
                if (size > 3)
                {
                        glc::triangulatePolygon(&currentFaceIndex, m_pCurrentObjMesh->m_Positions);
                }
                // Comput the face normal
                if (currentFaceIndex.size() < 3) return;
                GLC_Vector3df normal= computeNormal(currentFaceIndex.at(0), currentFaceIndex.at(1), currentFaceIndex.at(2));

                // Add Face normal to bulk data
                QSet<GLuint> indexSet= currentFaceIndex.toSet();
                QSet<GLuint>::iterator iIndexSet= indexSet.begin();
                while (indexSet.constEnd() != iIndexSet)
                {
                        m_pCurrentObjMesh->m_Normals[*iIndexSet * 3]= normal.X();
                        m_pCurrentObjMesh->m_Normals[*iIndexSet * 3 + 1]= normal.Y();
                        m_pCurrentObjMesh->m_Normals[*iIndexSet * 3 + 2]= normal.Z();

                        ++iIndexSet;
                }

                m_pCurrentObjMesh->m_Index.append(currentFaceIndex);

        }
        else
        {
                QString message= "GLC_ObjToWorld::extractFaceIndex : unknow face type";
                message.append("\nAt line : ");
                message.append(QString::number(m_CurrentLineNumber));
                qDebug() << message;
                GLC_FileFormatException fileFormatException(message, m_FileName, GLC_FileFormatException::FileNotSupported);
                clear();
                throw(fileFormatException);
        }
}
void GLC_ObjToWorld::setCurrentMaterial(QString &line)
{
        QTextStream streamString(&line);
        QString materialName;

        if (!((streamString >> materialName).status() == QTextStream::Ok))
        {
                QString message= "GLC_ObjToWorld::SetCurrentMaterial : failed to extract materialName";
                message.append("\nAt line : ");
                message.append(QString::number(m_CurrentLineNumber));
                qDebug() << message;
                GLC_FileFormatException fileFormatException(message, m_FileName, GLC_FileFormatException::WrongFileFormat);
                clear();
                throw(fileFormatException);
        }
        // Check if the material is already loaded from the current mesh
        if ((NULL != m_pMtlLoader) && m_pMtlLoader->contains(materialName))
        {
                Q_ASSERT(NULL != m_pCurrentObjMesh);
                Q_ASSERT(NULL != m_pCurrentObjMesh->m_pLastOffsetSize);

                if (m_pCurrentObjMesh->m_Index.size() != m_pCurrentObjMesh->m_pLastOffsetSize->m_Offset)
                {
                        // Update last material offsetSize
                        m_pCurrentObjMesh->m_pLastOffsetSize->m_size= m_pCurrentObjMesh->m_Index.size() - m_pCurrentObjMesh->m_pLastOffsetSize->m_Offset;
                }
                else
                {
                        QHash<QString, MatOffsetSize*>::iterator iMat= m_pCurrentObjMesh->m_Materials.begin();
                        while (m_pCurrentObjMesh->m_Materials.constEnd() != iMat)
                        {
                                if (iMat.value() == m_pCurrentObjMesh->m_pLastOffsetSize)
                                {
                                        iMat= m_pCurrentObjMesh->m_Materials.erase(iMat);
                                }
                                else
                                {
                                        ++iMat;
                                }
                        }
                }
                // Create this material offsetSize
                MatOffsetSize* pMatOffsetSize= new MatOffsetSize();
                pMatOffsetSize->m_Offset= m_pCurrentObjMesh->m_Index.size();
                // Update current Obj mesh
                m_pCurrentObjMesh->m_pLastOffsetSize= pMatOffsetSize;
                m_pCurrentObjMesh->m_Materials.insertMulti(materialName, pMatOffsetSize);
                // Update current material name
                m_CurrentMaterialName= materialName;
        }

}
// Extract a vertex from a string
void GLC_ObjToWorld::extractVertexIndex(QString ligne, int &Coordinate, int &Normal, int &TextureCoordinate)
{
        if (m_FaceType == notSet)
        {
                setObjType(ligne);
        }

        if (m_FaceType == coordinateAndTextureAndNormal)
        {
                // Replace "/" with " "
                ligne.replace('/', ' ');
                QTextStream streamVertex(&ligne);
                QString coordinateString, textureCoordinateString, normalString;
                if ((streamVertex >> coordinateString >> textureCoordinateString >> normalString).status() == QTextStream::Ok)
                {
                        bool coordinateOk, textureCoordinateOk, normalOk;
                        Coordinate= coordinateString.toInt(&coordinateOk);
                        --Coordinate;
                        TextureCoordinate= textureCoordinateString.toInt(&textureCoordinateOk);
                        --TextureCoordinate;
                        Normal= normalString.toInt(&normalOk);
                        --Normal;
                        if (!(coordinateOk && textureCoordinateOk && normalOk))
                        {
                                QString message= "GLC_ObjToWorld::extractVertexIndex failed to convert String to int";
                                message.append("\nAt line : ");
                                message.append(QString::number(m_CurrentLineNumber));
                                qDebug() << message;
                                GLC_FileFormatException fileFormatException(message, m_FileName, GLC_FileFormatException::WrongFileFormat);
                                clear();
                                throw(fileFormatException);
                        }
                }
                else
                {
                        QString message= "GLC_ObjToWorld::extractVertexIndex this Obj file type is not supported";
                        message.append("\nAt line : ");
                        message.append(QString::number(m_CurrentLineNumber));
                        qDebug() << message;
                        GLC_FileFormatException fileFormatException(message, m_FileName, GLC_FileFormatException::FileNotSupported);
                        clear();
                        throw(fileFormatException);
                }

        }
        else if (m_FaceType == coordinateAndTexture)
        {
                // Replace "/" with " "
                ligne.replace('/', ' ');
                QTextStream streamVertex(&ligne);
                QString coordinateString, textureCoordinateString;
                if ((streamVertex >> coordinateString >> textureCoordinateString).status() == QTextStream::Ok)
                {
                        bool coordinateOk, textureCoordinateOk;
                        Coordinate= coordinateString.toInt(&coordinateOk);
                        --Coordinate;
                        TextureCoordinate= textureCoordinateString.toInt(&textureCoordinateOk);
                        --TextureCoordinate;
                        Normal= -1;
                        if (!(coordinateOk && textureCoordinateOk))
                        {
                                QString message= "GLC_ObjToWorld::extractVertexIndex failed to convert String to int";
                                message.append("\nAt line : ");
                                message.append(QString::number(m_CurrentLineNumber));
                                qDebug() << message;
                                GLC_FileFormatException fileFormatException(message, m_FileName, GLC_FileFormatException::WrongFileFormat);
                                clear();
                                throw(fileFormatException);
                        }
                }
                else
                {
                        QString message= "GLC_ObjToWorld::extractVertexIndex this Obj file type is not supported";
                        message.append("\nAt line : ");
                        message.append(QString::number(m_CurrentLineNumber));
                        qDebug() << message;
                        GLC_FileFormatException fileFormatException(message, m_FileName, GLC_FileFormatException::FileNotSupported);
                        clear();
                        throw(fileFormatException);
                }
        }
        else if (m_FaceType == coordinateAndNormal)
        {
                // Replace "/" with " "
                ligne.replace('/', ' ');
                QTextStream streamVertex(&ligne);
                QString coordinateString, normalString;
                if ((streamVertex >> coordinateString >> normalString).status() == QTextStream::Ok)
                {
                        bool coordinateOk, normalOk;
                        Coordinate= coordinateString.toInt(&coordinateOk);
                        --Coordinate;
                        TextureCoordinate= -1;
                        Normal= normalString.toInt(&normalOk);
                        --Normal;
                        if (!(coordinateOk && normalOk))
                        {
                                QString message= "GLC_ObjToWorld::extractVertexIndex failed to convert String to int";
                                message.append("\nAt line : ");
                                message.append(QString::number(m_CurrentLineNumber));
                                qDebug() << message;
                                GLC_FileFormatException fileFormatException(message, m_FileName, GLC_FileFormatException::WrongFileFormat);
                                clear();
                                throw(fileFormatException);
                        }
                }
                else
                {
                        QString message= "GLC_ObjToWorld::extractVertexIndex this Obj file type is not supported";
                        message.append("\nAt line : ");
                        message.append(QString::number(m_CurrentLineNumber));
                        qDebug() << message;
                        GLC_FileFormatException fileFormatException(message, m_FileName, GLC_FileFormatException::FileNotSupported);
                        clear();
                        throw(fileFormatException);
                }
        }
        else if (m_FaceType == coordinate)
        {
                QTextStream streamVertex(&ligne);
                QString coordinateString;
                if ((streamVertex >> coordinateString).status() == QTextStream::Ok)
                {
                        bool coordinateOk;
                        Coordinate= coordinateString.toInt(&coordinateOk);
                        --Coordinate;
                        TextureCoordinate= -1;
                        Normal= -1;
                        if (!coordinateOk)
                        {
                                QString message= "GLC_ObjToWorld::extractVertexIndex failed to convert String to int";
                                message.append("\nAt line : ");
                                message.append(QString::number(m_CurrentLineNumber));
                                qDebug() << message;
                                GLC_FileFormatException fileFormatException(message, m_FileName, GLC_FileFormatException::WrongFileFormat);
                                clear();
                                throw(fileFormatException);
                        }
                }
                else
                {
                        QString message= "GLC_ObjToWorld::extractVertexIndex this Obj file type is not supported";
                        message.append("\nAt line : ");
                        message.append(QString::number(m_CurrentLineNumber));
                        qDebug() << message;
                        GLC_FileFormatException fileFormatException(message, m_FileName, GLC_FileFormatException::FileNotSupported);
                        clear();
                        throw(fileFormatException);
                }
        }
        else
        {
                QString message= "GLC_ObjToWorld::extractVertexIndex OBJ file not reconize";
                message.append("\nAt line : ");
                message.append(QString::number(m_CurrentLineNumber));
                qDebug() << message;
                GLC_FileFormatException fileFormatException(message, m_FileName, GLC_FileFormatException::FileNotSupported);
                clear();
                throw(fileFormatException);
        }
}

// set the OBJ File type
void GLC_ObjToWorld::setObjType(QString& ligne)
{
        const QRegExp coordinateOnlyRegExp("^\\d{1,}$"); // ex. 10
        const QRegExp coordinateTextureNormalRegExp("^\\d{1,}/\\d{1,}/\\d{1,}$"); // ex. 10/30/54
        const QRegExp coordinateNormalRegExp("^\\d{1,}//\\d{1,}$"); // ex. 10//54
        const QRegExp coordinateTextureRegExp("^\\d{1,}/\\d{1,}$"); // ex. 10/56

        if (coordinateTextureNormalRegExp.exactMatch(ligne))
        {
                m_FaceType= coordinateAndTextureAndNormal;
        }
        else if (coordinateTextureRegExp.exactMatch(ligne))
        {
                m_FaceType= coordinateAndTexture;
        }
        else if (coordinateNormalRegExp.exactMatch(ligne))
        {
                m_FaceType= coordinateAndNormal;
        }
        else if (coordinateOnlyRegExp.exactMatch(ligne))
        {
                m_FaceType= coordinate;
        }
        else
        {
                QString message= "GLC_ObjToWorld::setObjType OBJ file not reconize";
                message.append("\nAt line : ");
                message.append(QString::number(m_CurrentLineNumber));
                qDebug() << message;
                GLC_FileFormatException fileFormatException(message, m_FileName, GLC_FileFormatException::FileNotSupported);
                clear();
                throw(fileFormatException);
        }
}

// compute face normal
GLC_Vector3df GLC_ObjToWorld::computeNormal(GLuint index1, GLuint index2, GLuint index3)
{
        double xn, yn, zn;

        // Vertex 1
        xn= m_pCurrentObjMesh->m_Positions.at(index1 * 3);
        yn= m_pCurrentObjMesh->m_Positions.at(index1 * 3 + 1);
        zn= m_pCurrentObjMesh->m_Positions.at(index1 * 3 + 2);
        const GLC_Vector4d vect1(xn, yn, zn);

        // Vertex 2
        xn= m_pCurrentObjMesh->m_Positions.at(index2 * 3);
        yn= m_pCurrentObjMesh->m_Positions.at(index2 * 3 + 1);
        zn= m_pCurrentObjMesh->m_Positions.at(index2 * 3 + 2);
        const GLC_Vector4d vect2(xn, yn, zn);

        // Vertex 3
        xn= m_pCurrentObjMesh->m_Positions.at(index3 * 3);
        yn= m_pCurrentObjMesh->m_Positions.at(index3 * 3 + 1);
        zn= m_pCurrentObjMesh->m_Positions.at(index3 * 3 + 2);
        const GLC_Vector4d vect3(xn, yn, zn);

        const GLC_Vector4d edge1(vect3 - vect2);
        const GLC_Vector4d edge2(vect1 - vect2);

        GLC_Vector4d normal(edge1 ^ edge2);
        normal.setNormal(1);

        return normal.toVector3df();
}

// clear objToWorld allocate memmory
void GLC_ObjToWorld::clear()
{
        m_CurrentMeshMaterials.clear();
        m_ListOfAttachedFileName.clear();

        if (NULL != m_pMtlLoader)
        {
                delete m_pMtlLoader;
                m_pMtlLoader= NULL;
        }
        if (NULL != m_pCurrentObjMesh)
        {
                delete m_pCurrentObjMesh;
                m_pCurrentObjMesh= NULL;
        }

}
// Merge Mutli line in one
void GLC_ObjToWorld::mergeLines(QString* pLineBuff, QTextStream* p0bjStream)
{
        if (pLineBuff->endsWith(QChar('\\')))
        {
                pLineBuff->replace(QChar('\\'), QChar(' '));
                pLineBuff->append(p0bjStream->readLine());
                ++m_CurrentLineNumber;
                mergeLines(pLineBuff, p0bjStream);
        }
}

// Add the current Obj mesh to the world
void GLC_ObjToWorld::addCurrentObjMeshToWorld()
{
        if (NULL != m_pCurrentObjMesh)
        {
                if (not m_pCurrentObjMesh->m_Positions.isEmpty())
                {
                        m_pCurrentObjMesh->m_pMesh->addVertices(m_pCurrentObjMesh->m_Positions.toVector());
                        m_pCurrentObjMesh->m_Positions.clear();
                        m_pCurrentObjMesh->m_pMesh->addNormals(m_pCurrentObjMesh->m_Normals.toVector());
                        m_pCurrentObjMesh->m_Normals.clear();
                        if (not m_pCurrentObjMesh->m_Texels.isEmpty())
                        {
                                m_pCurrentObjMesh->m_pMesh->addTexels(m_pCurrentObjMesh->m_Texels.toVector());
                                m_pCurrentObjMesh->m_Texels.clear();
                        }
                        QHash<QString, MatOffsetSize*>::iterator iMat= m_pCurrentObjMesh->m_Materials.begin();
                        while (m_pCurrentObjMesh->m_Materials.constEnd() != iMat)
                        {
                                GLC_Material* pCurrentMaterial= NULL;
                                if ((NULL != m_pMtlLoader) and (m_pMtlLoader->contains(iMat.key())))
                                {
                                        pCurrentMaterial= m_pMtlLoader->material(iMat.key());
                                }
                                // Create the list of triangles to add to the mesh
                                const int offset= iMat.value()->m_Offset;
                                int size= iMat.value()->m_size;
                                if (0 == size)
                                {
                                        size= m_pCurrentObjMesh->m_Index.size() - offset;
                                }
                                //qDebug() << "Offset : " << offset << " size : " << size;
                                QList<GLuint> triangles;
                                for (int i= offset; i < (offset + size); ++i)
                                {
                                        triangles.append(m_pCurrentObjMesh->m_Index.at(i));
                                }
                                // Add the list of triangle to the mesh
                                if (not triangles.isEmpty())
                                {
                                        m_pCurrentObjMesh->m_pMesh->addTriangles(pCurrentMaterial, triangles);
                                }

                                ++iMat;
                        }
                        if (m_pCurrentObjMesh->m_pMesh->numberOfFaces() > 0)
                        {
                                m_pCurrentObjMesh->m_pMesh->finished();
                                GLC_3DRep* pRep= new GLC_3DRep(m_pCurrentObjMesh->m_pMesh);
                                m_pWorld->rootOccurence()->addChild((new GLC_StructReference(pRep))->createStructInstance());
                        }
                        else
                        {
                                delete m_pCurrentObjMesh->m_pMesh;
                        }

                }
                else
                {
                        delete m_pCurrentObjMesh->m_pMesh;
                }

                delete m_pCurrentObjMesh;
                m_pCurrentObjMesh= NULL;
        }
}

©2005 Laurent Ribon