glc_colladatoworld.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 2.0.0 Beta 1, packaged on April 2010.

 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_colladatoworld.h"
#include "../sceneGraph/glc_world.h"
#include "../glc_fileformatexception.h"
#include "../maths/glc_geomtools.h"
#include "../glc_factory.h"

// Default constructor
GLC_ColladaToWorld::GLC_ColladaToWorld(const QGLContext* pContext)
: QObject()
, m_pWorld(NULL)
, m_pQGLContext(pContext)
, m_pStreamReader(NULL)
, m_FileName()
, m_pFile()
, m_ImageFileHash()
, m_MaterialLibHash()
, m_SurfaceImageHash()
, m_MaterialEffectHash()
, m_pCurrentMaterial(NULL)
, m_TextureToMaterialHash()
, m_BulkDataHash()
, m_VerticesSourceHash()
, m_pMeshInfo(NULL)
, m_GeometryHash()
, m_ColladaNodeHash()
, m_TopLevelColladaNode()
, m_MaterialInstanceMap()
, m_3DRepHash()
, m_StructInstanceHash()
, m_CurrentId()
, m_FileSize(0)
, m_CurrentOffset(0)
, m_ListOfAttachedFileName()
, m_TransparentIsRgbZero(false)
{

}

// Destructor
GLC_ColladaToWorld::~GLC_ColladaToWorld()
{
        // Normal ends, wold has not to be deleted
        m_pWorld= NULL;
        clear();
}

// Set Functions
// Create an GLC_World from an input Collada File
GLC_World* GLC_ColladaToWorld::CreateWorldFromCollada(QFile &file)
{
        m_pWorld= new GLC_World();
        m_FileName= file.fileName();
        m_pFile= &file;

        // Test if the file exist and can be opened
        if (!m_pFile->open(QIODevice::ReadOnly))
        {
                QString message(QString("GLC_ColladaToWorld::CreateWorldFromCollada File ") + m_FileName + QString(" doesn't exist"));
                GLC_FileFormatException fileFormatException(message, m_FileName, GLC_FileFormatException::FileNotFound);
                throw(fileFormatException);
        }
        // Get the file size
        m_FileSize= QFileInfo(m_FileName).size();

        m_pStreamReader= new QXmlStreamReader(m_pFile);

        // Go to the collada root Element
        goToElement("COLLADA");

        // Read the collada version
        QString version= readAttribute("version", true);

        // Go to the asset Element to get the Up vector
        goToElement("asset");
        while (endElementNotReached("asset"))
        {
                if (QXmlStreamReader::StartElement == m_pStreamReader->tokenType())
                {
                        const QStringRef currentElementName= m_pStreamReader->name();
                        if (currentElementName == "up_axis")
                        {
                                const QString upAxis= getContent("up_axis");
                                if (upAxis == "X_UP") m_pWorld->setUpVector(glc::X_AXIS);
                                else if (upAxis == "Y_UP") m_pWorld->setUpVector(glc::Y_AXIS);
                                else if (upAxis == "Z_UP") m_pWorld->setUpVector(glc::Z_AXIS);
                        }
                }
                m_pStreamReader->readNext();
        }

        while (endElementNotReached("COLLADA"))
        {
                if (QXmlStreamReader::StartElement == m_pStreamReader->tokenType())
                {
                        const QStringRef currentElementName= m_pStreamReader->name();
                        if (currentElementName == "library_images") loadLibraryImage();
                        else if (currentElementName == "library_materials") loadLibraryMaterials();
                        else if (currentElementName == "library_effects") loadLibraryEffects();
                        else if (currentElementName == "library_geometries") loadLibraryGeometries();
                        else if (currentElementName == "library_nodes") loadLibraryNodes();
                        else if (currentElementName == "library_controllers") loadLibraryContollers();
                        else if (currentElementName == "library_visual_scenes") loadVisualScenes();
                        else if (currentElementName == "scene") loadScene();
                }

                m_pStreamReader->readNext();
        }
        // Link the textures to materials
        linkTexturesToMaterials();

        // Create the mesh and link them to material
        createMesh();

        // Create the scene graph struct
        createSceneGraph();

        emit currentQuantum(100);

        return m_pWorld;
}

// Private services Functions
// Go to Element
void GLC_ColladaToWorld::goToElement(const QString& elementName)
{
        while(startElementNotReached(elementName))
        {
                m_pStreamReader->readNext();
        }
        checkForXmlError(QString("Element ") + elementName + QString(" Not Found"));
}

// Go to the end Element of a xml
void GLC_ColladaToWorld::goToEndElement(const QString& elementName)
{
        while(endElementNotReached(elementName))
        {
                m_pStreamReader->readNext();
        }
        checkForXmlError(QString("End Element ") + elementName + QString(" Not Found"));
}

// Return the content of an element
QString GLC_ColladaToWorld::getContent(const QString& element)
{
        QString Content;
        while(endElementNotReached(element))
        {
                m_pStreamReader->readNext();
                if (m_pStreamReader->isCharacters() && !m_pStreamReader->text().isEmpty())
                {
                        Content+= m_pStreamReader->text().toString();
                }
        }

        return Content.simplified();
}

// Read the specified attribute
QString GLC_ColladaToWorld::readAttribute(const QString& name, bool required)
{
        QString attributeValue;
        if (required && !m_pStreamReader->attributes().hasAttribute(name))
        {
                QString message(QString("required attribute ") + name + QString(" Not found"));
                qDebug() << message;
                GLC_FileFormatException fileFormatException(message, m_FileName, GLC_FileFormatException::WrongFileFormat);
                clear();
                throw(fileFormatException);
        }
        else
        {
                attributeValue= m_pStreamReader->attributes().value(name).toString();
        }
        return attributeValue;
}

// Check for XML error
void GLC_ColladaToWorld::checkForXmlError(const QString& info)
{
        if (m_pStreamReader->atEnd() || m_pStreamReader->hasError())
        {
                qDebug() << info << " " << m_FileName;
                GLC_FileFormatException fileFormatException(info, m_FileName, GLC_FileFormatException::WrongFileFormat);
                clear();
                throw(fileFormatException);
        }
}
// Throw an exception with the specified text
void GLC_ColladaToWorld::throwException(const QString& message)
{
        qDebug() << message;
        GLC_FileFormatException fileFormatException(message, m_FileName, GLC_FileFormatException::WrongFileFormat);
        clear();
        throw(fileFormatException);
}

// Clear memmory
void GLC_ColladaToWorld::clear()
{
        delete m_pWorld;
        m_pWorld= NULL;

        delete m_pStreamReader;
        m_pStreamReader= NULL;

        if (NULL != m_pFile) m_pFile->close();
        m_pFile= NULL;

        m_ImageFileHash.clear();
        m_MaterialLibHash.clear();
        m_SurfaceImageHash.clear();

        // Clear the material effect hash table
        MaterialHash::iterator iMat= m_MaterialEffectHash.begin();
        while (iMat != m_MaterialEffectHash.constEnd())
        {
                if (iMat.value()->isUnused()) delete iMat.value();
                ++iMat;
        }
        m_MaterialEffectHash.clear();

        delete m_pCurrentMaterial;
        m_pCurrentMaterial= NULL;

        m_TextureToMaterialHash.clear();

        m_BulkDataHash.clear();

        m_VerticesSourceHash.clear();

        delete m_pMeshInfo;
        m_pMeshInfo= NULL;

        // Delete all geometry from the geometry hash
        QHash<const QString, MeshInfo*>::iterator iGeomHash= m_GeometryHash.begin();
        while (m_GeometryHash.constEnd() != iGeomHash)
        {
                delete iGeomHash.value();
                ++iGeomHash;
        }
        m_GeometryHash.clear();

        // Delete all collada node from the colalda node hash
        QHash<const QString, ColladaNode*>::iterator iColladaNode= m_ColladaNodeHash.begin();
        while (m_ColladaNodeHash.constEnd() != iColladaNode)
        {
                delete iColladaNode.value();
                ++iColladaNode;
        }
        m_ColladaNodeHash.clear();

        // Clear the list of top level node (Not must not to be deleted)
        m_TopLevelColladaNode.clear();

        // Clear the material instance map
        m_MaterialInstanceMap.clear();

        QHash<const QString, GLC_3DRep*>::iterator i3DRep= m_3DRepHash.begin();
        while (m_3DRepHash.constEnd() != i3DRep)
        {
                delete i3DRep.value();
                ++i3DRep;
        }
        m_3DRepHash.clear();

        // Clear instance Hash table
        m_StructInstanceHash.clear();

        m_CurrentId.clear();

        m_ListOfAttachedFileName.clear();
}

// Load library_images element
void GLC_ColladaToWorld::loadLibraryImage()
{
        while (endElementNotReached("library_images"))
        {
                if (QXmlStreamReader::StartElement == m_pStreamReader->tokenType())
                {
                        const QStringRef currentElementName= m_pStreamReader->name();
                        if (currentElementName == "image") loadImage();
                }
                m_pStreamReader->readNext();

                updateProgressBar();
        }
        checkForXmlError("Error occur while loading element : library_images");
}

// Load image element
void GLC_ColladaToWorld::loadImage()
{
        //qDebug() << "GLC_ColladaToWorld::loadImage()";
        // load image id
        m_CurrentId= readAttribute("id", true);
        QString fileName;
        // Trying to find external image fileName
        while (endElementNotReached("image"))
        {
                if (QXmlStreamReader::StartElement == m_pStreamReader->tokenType())
                {
                        const QStringRef currentElementName= m_pStreamReader->name();
                        if (currentElementName == "init_from")
                        {
                                fileName= getContent("init_from");
                        }
                }
                m_pStreamReader->readNext();
        }

        checkForXmlError("Error occur while loading element : image");

        // Add the image in the image fileName Hash table
        if (!fileName.isEmpty())
        {
                m_ImageFileHash.insert(m_CurrentId, fileName);
        }
}

// Load library_materials element
void GLC_ColladaToWorld::loadLibraryMaterials()
{
        while (endElementNotReached("library_materials"))
        {
                if (QXmlStreamReader::StartElement == m_pStreamReader->tokenType())
                {
                        const QStringRef currentElementName= m_pStreamReader->name();
                        if (currentElementName == "material") loadMaterial();
                }
                m_pStreamReader->readNext();

                updateProgressBar();
        }
        checkForXmlError("Error occur while loading element : library_materials");

}

// Load a material
void GLC_ColladaToWorld::loadMaterial()
{
        // load material id
        m_CurrentId= readAttribute("id", true);

        goToElement("instance_effect");

        // Load instance effect url
        const QString url= readAttribute("url", true).remove('#');
        //qDebug() << "instance effect URL : " << url;

        // Read instance effect parameters
        while (endElementNotReached("instance_effect"))
        {
                if (QXmlStreamReader::StartElement == m_pStreamReader->tokenType())
                {
                        const QStringRef currentElementName= m_pStreamReader->name();
                        if (currentElementName == "setparam")
                        {
                                qDebug() << "GLC_ColladaToWorld::loadMaterial : setparam found";
                        }
                }
                m_pStreamReader->readNext();
        }

        checkForXmlError("Error occur while loading element : material");

        // Add the image in the image fileName Hash table
        if (!url.isEmpty())
        {
                //qDebug() << "insert material : " << m_CurrentId << " url: " << url;
                m_MaterialLibHash.insert(m_CurrentId, url);
        }

}

// Load library_effects element
void GLC_ColladaToWorld::loadLibraryEffects()
{
        while (endElementNotReached("library_effects"))
        {
                if (QXmlStreamReader::StartElement == m_pStreamReader->tokenType())
                {
                        const QStringRef currentElementName= m_pStreamReader->name();
                        if (currentElementName == "effect") loadEffect();
                }
                m_pStreamReader->readNext();

                updateProgressBar();
        }
        checkForXmlError("Error occur while loading element : library_effects");

}

// Load an effect
void GLC_ColladaToWorld::loadEffect()
{
        // load effect id
        const QString id= readAttribute("id", true);
        m_CurrentId= id;
        m_pCurrentMaterial= new GLC_Material();
        m_pCurrentMaterial->setName(id);

        while (endElementNotReached("effect"))
        {
                if (QXmlStreamReader::StartElement == m_pStreamReader->tokenType())
                {
                        const QStringRef currentElementName= m_pStreamReader->name();
                        if (currentElementName == "profile_COMMON") loadProfileCommon();
                }
                m_pStreamReader->readNext();
        }

        checkForXmlError("Error occur while loading element : effect");

        m_MaterialEffectHash.insert(id, m_pCurrentMaterial);
        m_pCurrentMaterial= NULL;

}

// Load profile_COMMON
void GLC_ColladaToWorld::loadProfileCommon()
{
        //qDebug() << "GLC_ColladaToWorld::loadProfileCommon";
        while (endElementNotReached("profile_COMMON"))
        {
                if (QXmlStreamReader::StartElement == m_pStreamReader->tokenType())
                {
                        const QStringRef currentElementName= m_pStreamReader->name();
                        if (currentElementName == "image") loadImage();
                        else if (currentElementName == "newparam") loadNewParam();
                        else if (currentElementName == "technique") loadTechnique();
                }
                m_pStreamReader->readNext();
        }
        checkForXmlError("Error occur while loading element : profile_COMMON");
}

// Load a new param of the common profile
void GLC_ColladaToWorld::loadNewParam()
{
        //qDebug() << "GLC_ColladaToWorld::loadNewParam";
        // load param sid
        const QString sid= m_CurrentId + "::" + readAttribute("sid", true);
        while (endElementNotReached("newparam"))
        {
                if (QXmlStreamReader::StartElement == m_pStreamReader->tokenType())
                {
                        const QStringRef currentElementName= m_pStreamReader->name();
                        if (currentElementName == "surface") loadSurface(sid);
                        else if (currentElementName == "sampler2D") loadSampler2D(sid);
                }
                m_pStreamReader->readNext();
        }
        checkForXmlError("Error occur while loading element : profile_COMMON");
}

// Load a surface
void GLC_ColladaToWorld::loadSurface(const QString& sid)
{
        //qDebug() << "GLC_ColladaToWorld::loadSurface sid=" << sid ;
        while (endElementNotReached("surface"))
        {
                if (QXmlStreamReader::StartElement == m_pStreamReader->tokenType())
                {
                        const QStringRef currentElementName= m_pStreamReader->name();
                        if (currentElementName == "init_from")
                        {
                                const QString imageId= getContent("init_from");
                                m_SurfaceImageHash.insert(sid, imageId);
                        }
                }
                m_pStreamReader->readNext();
        }
        checkForXmlError("Error occur while loading element : surface");
}

// Load Sampler 2D
void GLC_ColladaToWorld::loadSampler2D(const QString& sid)
{
        //qDebug() << "GLC_ColladaToWorld::loadSampler2D sid= " << sid;
        while (endElementNotReached("sampler2D"))
        {
                if (QXmlStreamReader::StartElement == m_pStreamReader->tokenType())
                {
                        const QStringRef currentElementName= m_pStreamReader->name();
                        if (currentElementName == "source")
                        {
                                const QString source= m_CurrentId + "::" + getContent("source");
                                m_Sampler2DSurfaceHash.insert(sid, source);
                        }
                }
                m_pStreamReader->readNext();
        }
        checkForXmlError("Error occur while loading element : sampler2D");
}

// Load technique
void GLC_ColladaToWorld::loadTechnique()
{
        //qDebug() << "GLC_ColladaToWorld::loadTechnique";
        while (endElementNotReached("technique"))
        {
                if (QXmlStreamReader::StartElement == m_pStreamReader->tokenType())
                {
                        const QStringRef currentElementName= m_pStreamReader->name();
                        if (currentElementName == "phong") loadMaterialTechnique(currentElementName.toString());
                        if (currentElementName == "lambert") loadMaterialTechnique(currentElementName.toString());
                        if (currentElementName == "blinn") loadMaterialTechnique(currentElementName.toString());
                }
                m_pStreamReader->readNext();
        }
        checkForXmlError("Error occur while loading element : technique");
}

// load phong material
void GLC_ColladaToWorld::loadMaterialTechnique(const QString& elementName)
{
        //qDebug() << "GLC_ColladaToWorld::loadMaterialTechnique";
        while (endElementNotReached(elementName))
        {
                if (QXmlStreamReader::StartElement == m_pStreamReader->tokenType())
                {
                        const QStringRef currentElementName= m_pStreamReader->name();
                        if ((currentElementName == "emission")
                                        || (currentElementName == "ambient")
                                        || (currentElementName == "diffuse")
                                        ||(currentElementName == "specular"))
                                loadCommonColorOrTexture(currentElementName.toString());
                        else if (currentElementName == "transparent") loadTransparent();
                        else if (currentElementName == "transparency") loadTransparency(currentElementName.toString());
                        else if (currentElementName == "shininess") loadShininess(currentElementName.toString());
                }
                m_pStreamReader->readNext();
        }
        checkForXmlError("Error occur while loading element : " + elementName);
}

// load common color or texture
void GLC_ColladaToWorld::loadCommonColorOrTexture(const QString& name)
{
        //qDebug() << "GLC_ColladaToWorld::loadCommonColorOrTexture " << name;
        Q_ASSERT(NULL != m_pCurrentMaterial);

        while (endElementNotReached(name))
        {
                if (QXmlStreamReader::StartElement == m_pStreamReader->tokenType())
                {
                        const QStringRef currentElementName= m_pStreamReader->name();
                        if (currentElementName == "color")
                        {
                                if (name == "emission") m_pCurrentMaterial->setLightEmission(readXmlColor());
                                else if (name == "ambient") m_pCurrentMaterial->setAmbientColor(readXmlColor());
                                else if (name == "diffuse") m_pCurrentMaterial->setDiffuseColor(readXmlColor());
                                else if (name == "specular") m_pCurrentMaterial->setSpecularColor(readXmlColor());
                        }
                        else if (currentElementName == "texture")
                        {
                                //qDebug() << "Load texture " << name;
                                const QString sid = m_CurrentId + "::" + readAttribute("texture", true);
                                m_TextureToMaterialHash.insert(sid, m_pCurrentMaterial);
                        }
                }
                m_pStreamReader->readNext();
        }
        checkForXmlError("Error occur while loading element : " + name);
}

// Load transparent
void GLC_ColladaToWorld::loadTransparent()
{
        const QString opaque= readAttribute("opaque", false);
        if (opaque == "RGB_ZERO") m_TransparentIsRgbZero= true;
        else m_TransparentIsRgbZero= false;
}

// Load transparency
void GLC_ColladaToWorld::loadTransparency(const QString& name)
{
        //qDebug() << "GLC_ColladaToWorld::loadTransparency";
        Q_ASSERT(NULL != m_pCurrentMaterial);
        while (endElementNotReached(name))
        {
                if (QXmlStreamReader::StartElement == m_pStreamReader->tokenType())
                {
                        const QStringRef currentElementName= m_pStreamReader->name();
                        if (currentElementName == "float")
                        {
                                bool stringToFloatOk= false;
                                const QString alphaString= getContent("float");
                                float alpha;
                                if (m_TransparentIsRgbZero)
                                {
                                        alpha= alphaString.toFloat(&stringToFloatOk);
                                }
                                else
                                {
                                        alpha= 1.0f - alphaString.toFloat(&stringToFloatOk);
                                }
                                // A material mustn't be invisible (no sense)
                                if (qFuzzyCompare(alpha, 0.0f)) alpha= 1.0f;

                                m_pCurrentMaterial->setOpacity(alpha);
                                if (!stringToFloatOk) throwException("Error while trying to convert :" + alphaString + " to float");
                        }
                }
                m_pStreamReader->readNext();
        }
        checkForXmlError("Error occur while loading element : " + name);
}

// Load shininess
void GLC_ColladaToWorld::loadShininess(const QString& name)
{
        //qDebug() << "GLC_ColladaToWorld::loadShininess";
        Q_ASSERT(NULL != m_pCurrentMaterial);
        while (endElementNotReached(name))
        {
                if (QXmlStreamReader::StartElement == m_pStreamReader->tokenType())
                {
                        const QStringRef currentElementName= m_pStreamReader->name();
                        if (currentElementName == "float")
                        {
                                bool stringToFloatOk= false;
                                const QString shininessString= getContent("float");
                                const float shininess= shininessString.toFloat(&stringToFloatOk);
                                if (!stringToFloatOk) qDebug() << QString("Error while trying to convert :" + shininessString + " to float");
                                else m_pCurrentMaterial->setShininess(shininess);
                        }
                }
                m_pStreamReader->readNext();
        }
        checkForXmlError("Error occur while loading element : " + name);
}

// Read a xml Color
QColor GLC_ColladaToWorld::readXmlColor()
{
        //qDebug() << "GLC_ColladaToWorld::readXmlColor()";
        QColor resultColor;

        QString colorString= getContent("color");
        QStringList colors= colorString.split(' ');
        if(colors.size() == 4)
        {
                bool okRed, okGreen, okBlue, okAlpha;
                const float red= colors.at(0).toFloat(&okRed);
                const float green= colors.at(1).toFloat(&okGreen);
                const float blue= colors.at(2).toFloat(&okBlue);
                const float alpha= colors.at(3).toFloat(&okAlpha);
                if (okRed && okGreen && okBlue && okAlpha)
                {
                        resultColor.setRedF(red);
                        resultColor.setGreenF(green);
                        resultColor.setBlueF(blue);
                        resultColor.setAlphaF(alpha);
                }
                else
                {
                        QString info= "Error occur while reading xml color : " + colorString;
                        qDebug() << info << " " << m_FileName;
                        GLC_FileFormatException fileFormatException(info, m_FileName, GLC_FileFormatException::WrongFileFormat);
                        clear();
                        throw(fileFormatException);
                }
        }
        else
        {
                QString info= "Error occur while reading xml color : " + colorString;
                qDebug() << info << " " << m_FileName;
                GLC_FileFormatException fileFormatException(info, m_FileName, GLC_FileFormatException::WrongFileFormat);
                clear();
                throw(fileFormatException);
        }

        return resultColor;
}

// Load library_geometries element
void GLC_ColladaToWorld::loadLibraryGeometries()
{
        while (endElementNotReached("library_geometries"))
        {
                if (QXmlStreamReader::StartElement == m_pStreamReader->tokenType())
                {
                        const QStringRef currentElementName= m_pStreamReader->name();
                        if (currentElementName == "geometry") loadGeometry();
                }

                m_pStreamReader->readNext();

                updateProgressBar();
        }
        checkForXmlError("Error occur while loading element : library_geometries");
}

// Load an geometry element
void GLC_ColladaToWorld::loadGeometry()
{
        delete m_pMeshInfo;
        m_pMeshInfo= new MeshInfo();
        m_pMeshInfo->m_pMesh= new GLC_Mesh;

        const QString id= readAttribute("id", false);
        m_CurrentId= id;
        if (!id.isEmpty())
        {
                m_pMeshInfo->m_pMesh->setName(id);
                //qDebug() << "Loading geometry : " << id;
        }
        else
        {
                qDebug() << "Geometry without id found !!";
        }

        while (endElementNotReached("geometry"))
        {
                if (QXmlStreamReader::StartElement == m_pStreamReader->tokenType())
                {
                        const QStringRef currentElementName= m_pStreamReader->name();
                        if (currentElementName == "mesh") loadMesh();
                }

                m_pStreamReader->readNext();
        }
        checkForXmlError("Error occur while loading element : geometry");

        // Add the current mesh info to the geometry hash
        if (!id.isEmpty())
        {
                m_GeometryHash.insert(id, m_pMeshInfo);
                m_pMeshInfo= NULL;
        }
}

// Load a mesh
void GLC_ColladaToWorld::loadMesh()
{
        while (endElementNotReached("mesh"))
        {
                if (QXmlStreamReader::StartElement == m_pStreamReader->tokenType())
                {
                        const QStringRef currentElementName= m_pStreamReader->name();
                        if (currentElementName == "source") loadVertexBulkData();
                        else if (currentElementName == "vertices") loadVertices();
                        else if (currentElementName == "polylist") loadPolylist();
                        else if (currentElementName == "polygons") loadPolygons();
                        else if (currentElementName == "triangles") loadTriangles();
                        //else if (currentElementName == "trifans") loadTriFans();
                        //else if (currentElementName == "tristrips") loadTriStrip();
                }

                m_pStreamReader->readNext();
        }
        checkForXmlError("Error occur while loading element : mesh");
}

// Load Vertex bulk data
void GLC_ColladaToWorld::loadVertexBulkData()
{
        //qDebug() << "GLC_ColladaToWorld::loadVertexBulkData()";
        // load Vertex Bulk data id
        m_CurrentId= readAttribute("id", true);
        //qDebug() << "id=" << m_CurrentId;
        QList<float> vertices;

        while (endElementNotReached("source"))
        {
                if (QXmlStreamReader::StartElement == m_pStreamReader->tokenType())
                {
                        const QStringRef currentElementName= m_pStreamReader->name();
                        if ((currentElementName == "float_array"))
                        {
                                int count= readAttribute("count", true).toInt();
                                QString array= getContent("float_array");
                                QStringList list= array.split(' ');
                                // Check the array size
                                if (count != list.size()) throwException("float_array size not match");

                                for (int i= 0; i < count; ++i)
                                {
                                        vertices.append(list.at(i).toFloat());
                                }
                        }
                        else if (currentElementName == "technique_common")
                        {

                        }
                }

                m_pStreamReader->readNext();
        }
        checkForXmlError("Error occur while loading element : source");
        m_BulkDataHash.insert(m_CurrentId, vertices);

        updateProgressBar();
}

// Load attributes and identity of mesh vertices
void GLC_ColladaToWorld::loadVertices()
{
        //qDebug() << "GLC_ColladaToWorld::loadVertices()";
        // load Vertices id
        m_CurrentId= readAttribute("id", true);

        goToElement("input");
        const QString source= readAttribute("source", true).remove('#');
        m_VerticesSourceHash.insert(m_CurrentId, source);
        checkForXmlError("Error occur while loading element : vertices");
}

// Load polygons or polylist
void GLC_ColladaToWorld::loadPolylist()
{
        //qDebug() << "GLC_ColladaToWorld::loadPolylist()";
        // The number of polygon
        const int polygonCount= readAttribute("count", true).toInt();

        // The material id
        const QString materialId= readAttribute("material", false);

        // Offsets and data source list
        QList<InputData> inputDataList;

        // Polygon number of vertice list
        QList<int> vcountList;

        // Polygon index list
        QList<int> polyIndexList;

        while (endElementNotReached("polylist"))
        {
                if (QXmlStreamReader::StartElement == m_pStreamReader->tokenType())
                {
                        const QStringRef currentElementName= m_pStreamReader->name();
                        if ((currentElementName == "input") && vcountList.isEmpty())
                        {
                                InputData currentInput;
                                // Get input data offset
                                currentInput.m_Offset= readAttribute("offset", true).toInt();
                                // Get input data semantic
                                const QString semantic= readAttribute("semantic", true);
                                if (semantic == "VERTEX") currentInput.m_Semantic= VERTEX;
                                else if (semantic == "NORMAL") currentInput.m_Semantic= NORMAL;
                                else if (semantic == "TEXCOORD") currentInput.m_Semantic= TEXCOORD;
                                else throwException("Source semantic :" + semantic + "Not supported");
                                // Get input data source id
                                currentInput.m_Source= readAttribute("source", true).remove('#');

                                // Bypasss vertices indirection
                                if (m_VerticesSourceHash.contains(currentInput.m_Source))
                                {
                                        currentInput.m_Source= m_VerticesSourceHash.value(currentInput.m_Source);
                                }
                                inputDataList.append(currentInput);
                        }
                        else if ((currentElementName == "vcount") && (inputDataList.size() > 0))
                        {
                                QString vcountString= getContent("vcount");
                                QStringList vcountStringList= vcountString.split(' ');
                                if (vcountStringList.size() != polygonCount) throwException("vcount size not match");
                                bool toIntOK;
                                for (int i= 0; i < polygonCount; ++i)
                                {
                                        vcountList.append(vcountStringList.at(i).toInt(&toIntOK));
                                        if (!toIntOK) throwException("Unable to convert string :" + vcountStringList.at(i) + " To int");
                                }
                        }
                        else if ((currentElementName == "p") && !vcountList.isEmpty() && polyIndexList.isEmpty())
                        {
                                { // Fill index List
                                        QString pString= getContent("p");
                                        QStringList pStringList= pString.split(' ');
                                        bool toIntOK;
                                        const int size= pStringList.size();
                                        for (int i= 0; i < size; ++i)
                                        {
                                                polyIndexList.append(pStringList.at(i).toInt(&toIntOK));
                                                if (!toIntOK) throwException("Unable to convert string :" + pStringList.at(i) + " To int");
                                        }
                                }

                        }
                }
                m_pStreamReader->readNext();
        }
        // Add the polylist to the current mesh
        addPolylistToCurrentMesh(inputDataList, vcountList, polyIndexList, materialId);

        updateProgressBar();
}

// Load Polygons
void GLC_ColladaToWorld::loadPolygons()
{
        // The material id
        const QString materialId= readAttribute("material", false);

        // Offsets and data source list
        QList<InputData> inputDataList;

        // Polygon number of vertice list
        QList<int> vcountList;

        // The input number
        int inputCount= 0;
        // Polygon index list
        QList<int> polyIndexList;
        while (endElementNotReached("polygons"))
        {
                if (QXmlStreamReader::StartElement == m_pStreamReader->tokenType())
                {
                        const QStringRef currentElementName= m_pStreamReader->name();
                        if ((currentElementName == "input") && vcountList.isEmpty())
                        {
                                ++inputCount;
                                InputData currentInput;
                                // Get input data offset
                                currentInput.m_Offset= readAttribute("offset", true).toInt();
                                // Get input data semantic
                                const QString semantic= readAttribute("semantic", true);
                                if (semantic == "VERTEX") currentInput.m_Semantic= VERTEX;
                                else if (semantic == "NORMAL") currentInput.m_Semantic= NORMAL;
                                else if (semantic == "TEXCOORD") currentInput.m_Semantic= TEXCOORD;
                                else throwException("Source semantic :" + semantic + "Not supported");
                                // Get input data source id
                                currentInput.m_Source= readAttribute("source", true).remove('#');

                                // Bypasss vertices indirection
                                if (m_VerticesSourceHash.contains(currentInput.m_Source))
                                {
                                        currentInput.m_Source= m_VerticesSourceHash.value(currentInput.m_Source);
                                }
                                inputDataList.append(currentInput);
                        }
                        else if (currentElementName == "p")
                        {
                                { // Fill index List
                                        QString pString= getContent("p");
                                        QStringList pStringList= pString.split(' ');
                                        bool toIntOK;
                                        const int size= pStringList.size();
                                        for (int i= 0; i < size; ++i)
                                        {
                                                polyIndexList.append(pStringList.at(i).toInt(&toIntOK));
                                                if (!toIntOK) throwException("Unable to convert string :" + pStringList.at(i) + " To int");
                                        }
                                        // Add the polygon size in vcountList
                                        vcountList.append(size / inputCount);
                                }
                        }
                }
                m_pStreamReader->readNext();
        }
        // Add the polylist to the current mesh
        addPolylistToCurrentMesh(inputDataList, vcountList, polyIndexList, materialId);

        updateProgressBar();
}

// Add the polylist to the current mesh
void GLC_ColladaToWorld::addPolylistToCurrentMesh(const QList<InputData>& inputDataList, const QList<int>& vcountList, const QList<int>& polyIndexList, const QString& materialId)
{
        //qDebug() << "GLC_ColladaToWorld::addPolylistToCurrentMesh";

        const int polygonCount= vcountList.size();
        const int inputDataCount= inputDataList.size();
        const int polyIndexCount= polyIndexList.size();

        // Flag to know if the polylist has normal
        bool hasNormals= false;

        // Check the existance of data source
        for (int dataIndex= 0; dataIndex < inputDataCount; ++dataIndex)
        {
                const QString source= inputDataList.at(dataIndex).m_Source;
                if ( !m_BulkDataHash.contains(source))
                {
                        throwException(" Source : " + source + " Not found");
                }
                if (inputDataList.at(dataIndex).m_Semantic == NORMAL) hasNormals= true;
        }

        int maxOffset= 0;
        for (int i= 0; i < inputDataCount; ++i)
        {
                if (inputDataList.at(i).m_Offset > maxOffset)
                {
                        maxOffset= inputDataList.at(i).m_Offset;
                }
        }
        //qDebug() << " Max Offset :" << maxOffset;

        // the polygonIndex of the polylist
        QList<int> polygonIndex;

        // Fill the mapping, bulk data and index list of the current mesh info
        for (int i= 0; i < polyIndexCount; i+= maxOffset + 1)
        {
                // Create and set the current vertice index
                ColladaVertice currentVertice;
                for (int dataIndex= 0; dataIndex < inputDataCount; ++dataIndex)
                {
                        currentVertice.m_Values[inputDataList.at(dataIndex).m_Semantic]= polyIndexList.at(i + inputDataList.at(dataIndex).m_Offset);
                }

                if (m_pMeshInfo->m_Mapping.contains(currentVertice))
                {
                        // Add the the index to the polygon index
                        polygonIndex.append(m_pMeshInfo->m_Mapping.value(currentVertice));
                }
                else
                {
                        // Add the current vertice to the current mesh info mapping hash table and increment the freeIndex
                        m_pMeshInfo->m_Mapping.insert(currentVertice, (m_pMeshInfo->m_FreeIndex)++);
                        // Add the the index to the polygon index
                        polygonIndex.append(m_pMeshInfo->m_Mapping.value(currentVertice));

                        // Add the bulk data associated to the current vertice to the current mesh info
                        for (int dataIndex= 0; dataIndex < inputDataCount; ++dataIndex)
                        {
                                // The current input data
                                InputData currentInputData= inputDataList.at(dataIndex);
                                // QHash iterator on the right QList<float>
                                BulkDataHash::const_iterator iBulkHash= m_BulkDataHash.find(currentInputData.m_Source);
                                int stride;
                                if (currentInputData.m_Semantic != TEXCOORD) stride= 3; else stride= 2;
                                // Firts value
                                m_pMeshInfo->m_Datas[currentInputData.m_Semantic].append(iBulkHash.value().at(polyIndexList.at(i + currentInputData.m_Offset) * stride));
                                // Second value
                                m_pMeshInfo->m_Datas[currentInputData.m_Semantic].append(iBulkHash.value().at(polyIndexList.at(i + currentInputData.m_Offset) * stride + 1));
                                // Fird value
                                if (currentInputData.m_Semantic != TEXCOORD)
                                {
                                        m_pMeshInfo->m_Datas[currentInputData.m_Semantic].append(iBulkHash.value().at(polyIndexList.at(i + currentInputData.m_Offset) * stride + 2));
                                }
                        }
                }
        }

        // Save mesh info index offset
        const int indexOffset= m_pMeshInfo->m_Index.size();
        // Triangulate the polygons of the polylist
        // Input polygon index must start from 0 and succesive : (0 1 2 3 4)
        QList<GLuint> onePolygonIndex;
        for (int i= 0; i < polygonCount; ++i)
        {
                const int polygonSize= vcountList.at(i);
                Q_ASSERT(polygonSize > 2);
                for (int i= 0; i < polygonSize; ++i)
                {
                        onePolygonIndex.append(polygonIndex.takeFirst());
                }
                // Triangulate the current polygon if the polygon as more than 3 vertice
                if (polygonSize > 3)
                {
                        glc::triangulatePolygon(&onePolygonIndex, m_pMeshInfo->m_Datas.at(VERTEX));
                }
                // Add index to the mesh info
                //Q_ASSERT(not onePolygonIndex.isEmpty());
                if (!onePolygonIndex.isEmpty())
                {
                        m_pMeshInfo->m_Index.append(onePolygonIndex);
                }
                else
                {
                        qDebug() << QString("Unable to triangulate a polygon of " + m_pMeshInfo->m_pMesh->name());
                        //throwException("Unable to triangulate a polygon of " + m_pMeshInfo->m_pMesh->name());
                }
                onePolygonIndex.clear();
        }

        // Check if normal computation is needed
        if (!hasNormals)
        {
                qDebug() << "Compute Normals with offset " << indexOffset;
                computeNormalOfCurrentPrimitiveOfCurrentMesh(indexOffset);
        }

        // Add material the current mesh info
        MatOffsetSize matInfo;
        matInfo.m_Offset= indexOffset;
        matInfo.m_size= m_pMeshInfo->m_Index.size() - indexOffset;
        m_pMeshInfo->m_Materials.insert(materialId, matInfo);

}
// Compute Normals for the current primitive element of the current mesh
void GLC_ColladaToWorld::computeNormalOfCurrentPrimitiveOfCurrentMesh(int indexOffset)
{
        const QList<float>* pData= &(m_pMeshInfo->m_Datas.at(VERTEX));
        // Fill the list of normal
        QList<float>* pNormal= &(m_pMeshInfo->m_Datas[NORMAL]);
        const int normalOffset= pNormal->size();
        const int normalCount= pData->size() - normalOffset;
        for (int i= 0; i < normalCount; ++i)
        {
                pNormal->append(0.0f);
        }
        // Compute the normals and add them to the current mesh info
        const int size= m_pMeshInfo->m_Index.size() - indexOffset;
        double xn, yn, zn;


        for (int i= indexOffset; i < size; i+=3)
        {
                // Vertex 1
                xn= pData->at(m_pMeshInfo->m_Index.at(i) * 3);
                yn= pData->at(m_pMeshInfo->m_Index.at(i) * 3 + 1);
                zn= pData->at(m_pMeshInfo->m_Index.at(i) * 3 + 2);
                const GLC_Vector3d vect1(xn, yn, zn);

                // Vertex 2
                xn= pData->at(m_pMeshInfo->m_Index.at(i + 1) * 3);
                yn= pData->at(m_pMeshInfo->m_Index.at(i + 1) * 3  + 1);
                zn= pData->at(m_pMeshInfo->m_Index.at(i + 1) * 3 + 2);
                const GLC_Vector3d vect2(xn, yn, zn);

                // Vertex 3
                xn= pData->at(m_pMeshInfo->m_Index.at(i + 2) * 3);
                yn= pData->at(m_pMeshInfo->m_Index.at(i + 2) * 3 + 1);
                zn= pData->at(m_pMeshInfo->m_Index.at(i + 2) * 3 + 2);
                const GLC_Vector3d vect3(xn, yn, zn);

                const GLC_Vector3d edge1(vect3 - vect2);
                const GLC_Vector3d edge2(vect1 - vect2);

                GLC_Vector3d normal(edge1 ^ edge2);
                normal.normalize();

                GLC_Vector3df curNormal= normal.toVector3df();
                for (int curVertex= 0; curVertex < 3; ++curVertex)
                {
                        (*pNormal)[m_pMeshInfo->m_Index.at(i + curVertex) * 3]= curNormal.X();
                        (*pNormal)[m_pMeshInfo->m_Index.at(i + curVertex) * 3 + 1]= curNormal.Y();
                        (*pNormal)[m_pMeshInfo->m_Index.at(i + curVertex) * 3 + 2]= curNormal.Z();
                }
        }
}

// Load triangles
void  GLC_ColladaToWorld::loadTriangles()
{
        //qDebug() << "GLC_ColladaToWorld::loadTriangles()";
        // The material id
        const QString materialId= readAttribute("material", false);

        // Offsets and data source list
        QList<InputData> inputDataList;

        // triangle index list
        QList<int> trianglesIndexList;

        while (endElementNotReached("triangles"))
        {
                if (QXmlStreamReader::StartElement == m_pStreamReader->tokenType())
                {
                        const QStringRef currentElementName= m_pStreamReader->name();
                        if ((currentElementName == "input") && trianglesIndexList.isEmpty())
                        {
                                InputData currentInput;
                                // Get input data offset
                                currentInput.m_Offset= readAttribute("offset", true).toInt();
                                // Get input data semantic
                                const QString semantic= readAttribute("semantic", true);
                                if (semantic == "VERTEX") currentInput.m_Semantic= VERTEX;
                                else if (semantic == "NORMAL") currentInput.m_Semantic= NORMAL;
                                else if (semantic == "TEXCOORD") currentInput.m_Semantic= TEXCOORD;
                                else throwException("Source semantic :" + semantic + "Not supported");
                                // Get input data source id
                                currentInput.m_Source= readAttribute("source", true).remove('#');

                                // Bypasss vertices indirection
                                if (m_VerticesSourceHash.contains(currentInput.m_Source))
                                {
                                        currentInput.m_Source= m_VerticesSourceHash.value(currentInput.m_Source);
                                }
                                inputDataList.append(currentInput);
                        }
                        else if ((currentElementName == "p") && trianglesIndexList.isEmpty())
                        {
                                { // Fill index List
                                        QString pString= getContent("p");
                                        QStringList pStringList= pString.split(' ');
                                        bool toIntOK;
                                        const int size= pStringList.size();
                                        for (int i= 0; i < size; ++i)
                                        {
                                                trianglesIndexList.append(pStringList.at(i).toInt(&toIntOK));
                                                if (!toIntOK) throwException("Unable to convert string :" + pStringList.at(i) + " To int");
                                        }
                                }

                        }
                }
                m_pStreamReader->readNext();
        }

        // Add the polylist to the current mesh
        addTrianglesToCurrentMesh(inputDataList, trianglesIndexList, materialId);

        updateProgressBar();

}

// Add the triangles to current mesh
void GLC_ColladaToWorld::addTrianglesToCurrentMesh(const QList<InputData>& inputDataList, const QList<int>& trianglesIndexList, const QString& materialId)
{
        //qDebug() << "GLC_ColladaToWorld::addTrianglesToCurrentMesh";

        const int inputDataCount= inputDataList.size();
        const int trianglesIndexCount= trianglesIndexList.size();

        // Flag to know if the polylist has normal
        bool hasNormals= false;

        // Check the existance of data source
        for (int dataIndex= 0; dataIndex < inputDataCount; ++dataIndex)
        {
                const QString source= inputDataList.at(dataIndex).m_Source;
                if ( !m_BulkDataHash.contains(source))
                {
                        throwException(" Source : " + source + " Not found");
                }
                if (inputDataList.at(dataIndex).m_Semantic == NORMAL) hasNormals= true;
        }

        int maxOffset= 0;
        for (int i= 0; i < inputDataCount; ++i)
        {
                if (inputDataList.at(i).m_Offset > maxOffset)
                {
                        maxOffset= inputDataList.at(i).m_Offset;
                }
        }
        //qDebug() << " Triangles Max Offset :" << maxOffset;

        // the polygonIndex of the polylist
        QList<GLuint> trianglesIndex;

        // Fill the mapping, bulk data and index list of the current mesh info
        for (int i= 0; i < trianglesIndexCount; i+= maxOffset + 1)
        {
                // Create and set the current vertice index
                ColladaVertice currentVertice;
                for (int dataIndex= 0; dataIndex < inputDataCount; ++dataIndex)
                {
                        currentVertice.m_Values[inputDataList.at(dataIndex).m_Semantic]= trianglesIndexList.at(i + inputDataList.at(dataIndex).m_Offset);
                }

                if (m_pMeshInfo->m_Mapping.contains(currentVertice))
                {
                        // Add the the index to the triangles index
                        trianglesIndex.append(m_pMeshInfo->m_Mapping.value(currentVertice));
                }
                else
                {
                        // Add the current vertice to the current mesh info mapping hash table and increment the freeIndex
                        m_pMeshInfo->m_Mapping.insert(currentVertice, (m_pMeshInfo->m_FreeIndex)++);
                        // Add the the index to the triangles index
                        trianglesIndex.append(m_pMeshInfo->m_Mapping.value(currentVertice));

                        // Add the bulk data associated to the current vertice to the current mesh info
                        for (int dataIndex= 0; dataIndex < inputDataCount; ++dataIndex)
                        {
                                // The current input data
                                InputData currentInputData= inputDataList.at(dataIndex);
                                // QHash iterator on the right QList<float>
                                BulkDataHash::const_iterator iBulkHash= m_BulkDataHash.find(currentInputData.m_Source);
                                int stride;
                                if (currentInputData.m_Semantic != TEXCOORD) stride= 3; else stride= 2;
                                // Firts value
                                m_pMeshInfo->m_Datas[currentInputData.m_Semantic].append(iBulkHash.value().at(trianglesIndexList.at(i + currentInputData.m_Offset) * stride));
                                // Second value
                                m_pMeshInfo->m_Datas[currentInputData.m_Semantic].append(iBulkHash.value().at(trianglesIndexList.at(i + currentInputData.m_Offset) * stride + 1));
                                // Fird value
                                if (currentInputData.m_Semantic != TEXCOORD)
                                {
                                        m_pMeshInfo->m_Datas[currentInputData.m_Semantic].append(iBulkHash.value().at(trianglesIndexList.at(i + currentInputData.m_Offset) * stride + 2));
                                }
                        }
                }
        }

        // Save mesh info index offset
        const int indexOffset= m_pMeshInfo->m_Index.size();

        // Add index to the mesh info
        m_pMeshInfo->m_Index.append(trianglesIndex);

        // Check if normal computation is needed
        if (!hasNormals)
        {
                computeNormalOfCurrentPrimitiveOfCurrentMesh(indexOffset);
        }

        // Add material the current mesh info
        MatOffsetSize matInfo;
        matInfo.m_Offset= indexOffset;
        matInfo.m_size= m_pMeshInfo->m_Index.size() - indexOffset;
        m_pMeshInfo->m_Materials.insertMulti(materialId, matInfo);

}

// Load the library nodes
void GLC_ColladaToWorld::loadLibraryNodes()
{
        //qDebug() << "GLC_ColladaToWorld::loadLibraryNodes";

        while (endElementNotReached("library_nodes"))
        {
                if (QXmlStreamReader::StartElement == m_pStreamReader->tokenType())
                {
                        const QStringRef currentElementName= m_pStreamReader->name();
                        if ((currentElementName == "node"))
                        {
                                GLC_ColladaToWorld::ColladaNode* pNode= loadNode(NULL);
                                if (NULL != pNode)
                                {

                                }
                        }
                }

                updateProgressBar();

                m_pStreamReader->readNext();
        }
        checkForXmlError("Error occur while loading element : library_nodes");
}

// Load the library controllers
void GLC_ColladaToWorld::loadLibraryContollers()
{
        //qDebug() << "GLC_ColladaToWorld::loadLibraryContollers";

        while (endElementNotReached("library_controllers"))
        {
                if (QXmlStreamReader::StartElement == m_pStreamReader->tokenType())
                {
                        const QStringRef currentElementName= m_pStreamReader->name();
                        if ((currentElementName == "controller")) loadController();
                }

                updateProgressBar();

                m_pStreamReader->readNext();
        }
        checkForXmlError("Error occur while loading element : library_controllers");
}

// Load library_visual_scenes element
void GLC_ColladaToWorld::loadVisualScenes()
{
        //qDebug() << "GLC_ColladaToWorld::loadVisualScenes";
        // The element library visual scene must contains a visual scene element
        goToElement("visual_scene");

        while (endElementNotReached("visual_scene"))
        {
                if (QXmlStreamReader::StartElement == m_pStreamReader->tokenType())
                {
                        const QStringRef currentElementName= m_pStreamReader->name();
                        if (currentElementName == "node")
                        {
                                GLC_ColladaToWorld::ColladaNode* pNode= loadNode(NULL);
                                if (NULL != pNode)
                                {
                                        m_TopLevelColladaNode.append(pNode);
                                }
                        }
                }

                updateProgressBar();

                m_pStreamReader->readNext();
        }
        checkForXmlError("Error occur while loading element : visual_scene");
}

// Load an instance geometry
void GLC_ColladaToWorld::loadInstanceGeometry(ColladaNode* pNode)
{
        //qDebug() << "GLC_ColladaToWorld::loadInstanceGeometry";

        const QString url= readAttribute("url", true).remove('#');
        pNode->m_InstanceGeometryIDs.append(url);

        while (endElementNotReached("instance_geometry"))
        {
                if (QXmlStreamReader::StartElement == m_pStreamReader->tokenType())
                {
                        const QStringRef currentElementName= m_pStreamReader->name();
                        if ((currentElementName == "instance_material"))
                        {
                                const QString target= readAttribute("target", true).remove('#');
                                const QString symbol= readAttribute("symbol", true);
                                m_MaterialInstanceMap.insert(symbol, target);
                        }

                }
                m_pStreamReader->readNext();
        }
        checkForXmlError("Error occur while loading element : instance_geometry");
}

// Load an instance of node
void GLC_ColladaToWorld::loadInstanceNode(ColladaNode* pNode)
{
        //qDebug() << "GLC_ColladaToWorld::loadInstanceNode";
        const QString url= readAttribute("url", true).remove('#');
        pNode->m_InstanceOffNodeIds.append(url);
}

// Load an instance Controller
void GLC_ColladaToWorld::loadInstanceController(ColladaNode* pNode)
{
        const QString url= readAttribute("url", true).remove('#');
        pNode->m_InstanceOffNodeIds.append(url);

        while (endElementNotReached("instance_controller"))
        {
                if (QXmlStreamReader::StartElement == m_pStreamReader->tokenType())
                {
                        const QStringRef currentElementName= m_pStreamReader->name();
                        if ((currentElementName == "instance_material"))
                        {
                                const QString target= readAttribute("target", true).remove('#');
                                const QString symbol= readAttribute("symbol", true);
                                m_MaterialInstanceMap.insert(symbol, target);
                        }
                }
                m_pStreamReader->readNext();
        }
        checkForXmlError("Error occur while loading element : instance_controller");
}

// Load a collada controller node
void GLC_ColladaToWorld::loadController()
{

        m_CurrentId= readAttribute("id", true);
        while (endElementNotReached("controller"))
        {
                if (QXmlStreamReader::StartElement == m_pStreamReader->tokenType())
                {
                        const QStringRef currentElementName= m_pStreamReader->name();
                        if ((currentElementName == "skin"))
                        {
                                const QString source= readAttribute("source", true).remove('#');
                                ColladaNode* pNode= new ColladaNode(m_CurrentId, NULL);
                                pNode->m_InstanceGeometryIDs.append(source);
                                m_ColladaNodeHash.insert(m_CurrentId, pNode);
                        }
                }
                m_pStreamReader->readNext();
        }
        checkForXmlError("Error occur while loading element : controller");

}

// Load a Collada Node element
GLC_ColladaToWorld::ColladaNode* GLC_ColladaToWorld::loadNode(ColladaNode* pParent)
{
        //qDebug() << "GLC_ColladaToWorld::loadNode";
        QString id= readAttribute("id", false);
        if (id.isEmpty())
        {
                id= readAttribute("name", true);
        }
        //qDebug() << "Load Node " << id;
        m_CurrentId= id;
        // The node
        ColladaNode* pNode= new ColladaNode(id, pParent);
        // To avoid infinite call
        //m_pStreamReader->readNext();

        while (endElementNotReached("node"))
        {
                if (QXmlStreamReader::StartElement == m_pStreamReader->tokenType())
                {
                        const QStringRef currentElementName= m_pStreamReader->name();

                        if ((currentElementName == "translate")) translateNode(pNode);
                        else if ((currentElementName == "scale")) scaleNode(pNode);
                        else if ((currentElementName == "rotate")) rotateNode(pNode);
                        else if ((currentElementName == "matrix")) composeMatrixNode(pNode);
                        else if ((currentElementName == "instance_geometry")) loadInstanceGeometry(pNode);
                        else if ((currentElementName == "instance_node")) loadInstanceNode(pNode);
                        else if ((currentElementName == "instance_controller")) loadInstanceController(pNode);
                        else if ((currentElementName == "node"))
                        {
                                QString newId= readAttribute("id", false);
                                if (newId.isEmpty())
                                {
                                        //qDebug() << "Child ReadAttribute name";
                                        newId= readAttribute("name", true);
                                }
                                if (newId != id)
                                {
                                        //qDebug() << "New ID = " << newId;
                                        GLC_ColladaToWorld::ColladaNode* pChildNode= loadNode(pNode);
                                        if (NULL != pNode)
                                        {
                                                //qDebug() << "Add child";
                                                pNode->m_ChildNodes.append(pChildNode);
                                        }
                                }
                        }
                        else if ((currentElementName == "instance_camera")
                                        || (currentElementName == "instance_light"))
                        {
                                // Node type not supported
                                delete pNode;
                                pNode= NULL;
                        }
                }
                m_pStreamReader->readNext();

        }

        if (NULL != pNode)
        {
                // Add the collada node to the collada node hash table
                m_ColladaNodeHash.insert(id, pNode);
        }
        return pNode;
}


// Translate the node
void GLC_ColladaToWorld::translateNode(ColladaNode* pNode)
{
        //qDebug() << "Translate Node";
        Q_ASSERT(NULL != pNode);
        // Load translation values
        QStringList translateStringList= getContent("translate").simplified().split(' ');
        // A translation must contains 3 string
        const int size= translateStringList.size();
        if (translateStringList.size() != 3) throwException("Translate element must contains 3 floats and it's contains :" + QString::number(translateStringList.size()));
        // Convert the string to double
        double translate[3];
        bool toFloatOk= false;
        for (int i= 0; i < size; ++i)
        {
                translate[i]= static_cast<double>(translateStringList.at(i).toFloat(&toFloatOk));
                if (!toFloatOk) throwException("The number :" + translateStringList.at(i) + "Is not a float");
        }
        // Built the translation matrix
        GLC_Matrix4x4 translationMatrix(translate[0], translate[1], translate[2]);
        // Update the node matrix
        pNode->m_Matrix= pNode->m_Matrix * translationMatrix;
}

// Scale the node
void GLC_ColladaToWorld::scaleNode(ColladaNode* pNode)
{
        //qDebug() << "Scale Node";
        Q_ASSERT(NULL != pNode);
        // Load scale values
        QStringList scaleStringList= getContent("scale").simplified().split(' ');
        // A scale must contains 3 string
        const int size= scaleStringList.size();
        if (scaleStringList.size() != 3) throwException("Scale element must contains 3 floats and it's contains :" + QString::number(scaleStringList.size()));
        // Convert the string to double
        double scale[3];
        bool toFloatOk= false;
        for (int i= 0; i < size; ++i)
        {
                scale[i]= static_cast<double>(scaleStringList.at(i).toFloat(&toFloatOk));
                if (!toFloatOk) throwException("The number :" + scaleStringList.at(i) + "Is not a float");
        }
        // Built the translation matrix
        GLC_Matrix4x4 scaleMatrix;
        scaleMatrix.setMatScaling(scale[0], scale[1], scale[2]);
        // Update the node matrix
        pNode->m_Matrix= pNode->m_Matrix * scaleMatrix;
}

// Rotate the node
void GLC_ColladaToWorld::rotateNode(ColladaNode* pNode)
{
        //qDebug() << "Rotate Node";
        Q_ASSERT(NULL != pNode);
        // Load rotate values
        QStringList rotateStringList= getContent("rotate").simplified().split(' ');
        // A rotate must contains 4 string (Axis Vector 3 + Angle)
        const int size= rotateStringList.size();
        if (rotateStringList.size() != 4) throwException("Rotate element must contains 4 floats and it's contains :" + QString::number(rotateStringList.size()));
        // Convert the string to double
        double rotate[4];
        bool toFloatOk= false;
        for (int i= 0; i < size; ++i)
        {
                rotate[i]= static_cast<double>(rotateStringList.at(i).toFloat(&toFloatOk));
                if (!toFloatOk) throwException("The number :" + rotateStringList.at(i) + "Is not a float");
        }
        // Rotation vector
        GLC_Vector3d rotationAxis(rotate[0], rotate[1], rotate[2]);
        // Built the rotation matrix
        GLC_Matrix4x4 rotationMatrix(rotationAxis, rotate[3]);
        // Update the node matrix
        pNode->m_Matrix= pNode->m_Matrix * rotationMatrix;
}

// Compose Node matrix
void GLC_ColladaToWorld::composeMatrixNode(ColladaNode* pNode)
{
        Q_ASSERT(NULL != pNode);

        // Load matrix values
        QStringList matrixStringList= getContent("matrix").simplified().split(' ');
        // A rotate must contains 16 string 4 x 4 Matrix
        const int size= matrixStringList.size();
        if (size != 16) throwException("Matrix element must contains 16 floats and it's contains :" + QString::number(size));
        // Convert the string to double
        double matrix[16];
        bool toFloatOk= false;
        for (int i= 0; i < 4; ++i)
        {
                matrix[i]= static_cast<double>(matrixStringList.at(i * 4).toFloat(&toFloatOk));
                if (!toFloatOk) throwException("The number :" + matrixStringList.at(i) + "Is not a float");

                matrix[i + 4]= static_cast<double>(matrixStringList.at(i * 4 + 1).toFloat(&toFloatOk));
                if (!toFloatOk) throwException("The number :" + matrixStringList.at(i * 4 + 1) + "Is not a float");

                matrix[i + 8]= static_cast<double>(matrixStringList.at(i * 4 + 2).toFloat(&toFloatOk));
                if (!toFloatOk) throwException("The number :" + matrixStringList.at(i * 4 + 2) + "Is not a float");

                matrix[i + 12]= static_cast<double>(matrixStringList.at(i * 4 + 3).toFloat(&toFloatOk));
                if (!toFloatOk) throwException("The number :" + matrixStringList.at(i * 4 + 3) + "Is not a float");

        }
        // Built the matrix
        GLC_Matrix4x4 currentMatrix(matrix);
        // Update the node matrix
        pNode->m_Matrix= pNode->m_Matrix * currentMatrix;
}

// Load scene element
void GLC_ColladaToWorld::loadScene()
{
        //qDebug() << "GLC_ColladaToWorld::loadScene";
        while (endElementNotReached("scene"))
        {
                // Nothing to do
                m_pStreamReader->readNext();
        }
}

// Link texture to material
void GLC_ColladaToWorld::linkTexturesToMaterials()
{
        // Iterate throuth the the texture id to material hash
        MaterialHash::iterator iMat= m_TextureToMaterialHash.begin();
        while (iMat != m_TextureToMaterialHash.constEnd())
        {
                GLC_Material* pCurrentMaterial= iMat.value();
                const QString textureId= iMat.key();

                // Check that the texture is present
                if (m_Sampler2DSurfaceHash.contains(textureId))
                {
                        const QString surfaceId= m_Sampler2DSurfaceHash.value(textureId);
                        if (m_SurfaceImageHash.contains(surfaceId))
                        {
                                const QString imageFileId=  m_SurfaceImageHash.value(surfaceId);
                        }
                }
                if (m_Sampler2DSurfaceHash.contains(textureId) && m_SurfaceImageHash.contains(m_Sampler2DSurfaceHash.value(textureId))
                                && m_ImageFileHash.contains(m_SurfaceImageHash.value(m_Sampler2DSurfaceHash.value(textureId))))
                {
                        const QString imageFileName= m_ImageFileHash.value(m_SurfaceImageHash.value(m_Sampler2DSurfaceHash.value(textureId)));
                        QString fullImageFileName= QFileInfo(m_FileName).absolutePath() + QDir::separator() + imageFileName;
                        if (QFileInfo(fullImageFileName).exists())
                        {
                                m_ListOfAttachedFileName << fullImageFileName;
                                GLC_Texture* pTexture= new GLC_Texture(m_pQGLContext, fullImageFileName);
                                pCurrentMaterial->setTexture(pTexture);
                        }
                        else if (QFileInfo(m_FileName).absolutePath() != QFileInfo(fullImageFileName).absolutePath())
                        {
                                // Trying to find image in collada file path
                                QString fullImageFileName= QFileInfo(m_FileName).absolutePath() + QDir::separator() + QFileInfo(imageFileName).fileName();
                                if (QFileInfo(fullImageFileName).exists())
                                {
                                        m_ListOfAttachedFileName << fullImageFileName;
                                        GLC_Texture* pTexture= new GLC_Texture(m_pQGLContext, fullImageFileName);
                                        pCurrentMaterial->setTexture(pTexture);
                                }
                                else
                                {
                                        qDebug() << imageFileName << " Not found";
                                }
                        }
                        else
                        {
                                qDebug() << imageFileName << " Not found";
                        }

                }
                else
                {
                        qDebug() << "Texture : " << textureId << " Not found";
                }
                ++iMat;
        }
}
// Create mesh and link them to material
void GLC_ColladaToWorld::createMesh()
{
        //qDebug() << "GLC_ColladaToWorld::createMesh()";
        QHash<const QString, MeshInfo*>::iterator iMeshInfo= m_GeometryHash.begin();
        while (m_GeometryHash.constEnd() != iMeshInfo)
        {
                MeshInfo* pCurrentMeshInfo= iMeshInfo.value();
                // Add Bulk Data to the mesh
                // Add vertice
                pCurrentMeshInfo->m_pMesh->addVertice(pCurrentMeshInfo->m_Datas.at(VERTEX).toVector());
                //qDebug() << "Add " << pCurrentMeshInfo->m_Datas[VERTEX].size() << " Vertice";
                pCurrentMeshInfo->m_Datas[VERTEX].clear();

                // Add Normal
                pCurrentMeshInfo->m_pMesh->addNormals(pCurrentMeshInfo->m_Datas.at(NORMAL).toVector());
                //qDebug() << "Add " << pCurrentMeshInfo->m_Datas[NORMAL].size() << " Normal";
                pCurrentMeshInfo->m_Datas[NORMAL].clear();

                // Add texel if necessary
                //qDebug() << "Add " << pCurrentMeshInfo->m_Datas[TEXCOORD].size() << " texel";
                if (!pCurrentMeshInfo->m_Datas.at(TEXCOORD).isEmpty())
                {
                        pCurrentMeshInfo->m_pMesh->addTexels(pCurrentMeshInfo->m_Datas.at(TEXCOORD).toVector());
                        pCurrentMeshInfo->m_Datas[TEXCOORD].clear();
                }

                // Add face index and material to the mesh
                QHash<QString, MatOffsetSize>::iterator iMatInfo= pCurrentMeshInfo->m_Materials.begin();
                while (pCurrentMeshInfo->m_Materials.constEnd() != iMatInfo)
                {
                        // Trying to find the material
                        QString materialId= iMatInfo.key();
                        GLC_Material* pCurrentMaterial= NULL;
                        if (m_MaterialInstanceMap.contains(materialId))
                        {
                                //qDebug() << "Map " << materialId << " to " << m_MaterialInstanceMap.value(materialId);
                                materialId= m_MaterialInstanceMap.value(materialId);
                        }
                        //qDebug() << "MaterialLibHash size : " << m_MaterialLibHash.size();
                        if (m_MaterialLibHash.contains(materialId))
                        {
                                materialId= m_MaterialLibHash.value(materialId);
                                //qDebug() << "Material id " << materialId;
                        }
                        if (m_MaterialEffectHash.contains(materialId))
                        {
                                //qDebug() << "Material " << materialId << " find";
                                pCurrentMaterial= m_MaterialEffectHash.value(materialId);
                                Q_ASSERT(NULL != pCurrentMaterial);
                        }
                        else qDebug() << "Material " << materialId << " Not found";

                        // Create the list of triangles to add to the mesh
                        const int offset= iMatInfo.value().m_Offset;
                        const int size= iMatInfo.value().m_size;
                        //qDebug() << "Offset : " << offset << " size : " << size;
                        QList<GLuint> triangles;
                        for (int i= offset; i < (offset + size); ++i)
                        {
                                triangles.append(pCurrentMeshInfo->m_Index.at(i));
                        }
                        //qDebug() << "Add " << triangles.size() << " elment to the triangle index";
                        // Add the list of triangle to the mesh
                        if (!triangles.isEmpty())
                        {
                                pCurrentMeshInfo->m_pMesh->addTriangles(pCurrentMaterial, triangles);
                        }

                        ++iMatInfo;
                }
                pCurrentMeshInfo->m_pMesh->finish();
                GLC_3DRep* pRep= new GLC_3DRep(pCurrentMeshInfo->m_pMesh);
                pCurrentMeshInfo->m_pMesh= NULL;
                pRep->clean();
                //qDebug() << "Insert Rep : " << iMeshInfo.key();
                m_3DRepHash.insert(iMeshInfo.key(), pRep);
                ++iMeshInfo;
        }
}

// Create the scene graph struct
void GLC_ColladaToWorld::createSceneGraph()
{
        const int topLevelNodeCount= m_TopLevelColladaNode.size();
        for (int i= 0; i < topLevelNodeCount; ++i)
        {
                ColladaNode* pCurrentColladaNode= m_TopLevelColladaNode.at(i);
                //qDebug() << "Top level node is : " << pCurrentColladaNode->m_Id;
                if (NULL != pCurrentColladaNode)
                {
                        GLC_StructOccurence* pOccurence= createOccurenceFromNode(pCurrentColladaNode);
                        m_pWorld->rootOccurence()->addChild(pOccurence);
                }
        }

        // Update position
        m_pWorld->rootOccurence()->removeEmptyChildren();
        m_pWorld->rootOccurence()->updateChildrenAbsoluteMatrix();

}

// Create Occurence tree from node tree
GLC_StructOccurence* GLC_ColladaToWorld::createOccurenceFromNode(ColladaNode* pNode)
{
        //qDebug() << "GLC_ColladaToWorld::createOccurenceFromNode";
        Q_ASSERT(NULL != pNode);
        GLC_StructInstance* pInstance= NULL;
        GLC_StructOccurence* pOccurence= NULL;
        if (!pNode->m_InstanceGeometryIDs.isEmpty())
        {
                if (m_StructInstanceHash.contains(pNode->m_Id))
                {
                        pInstance= new GLC_StructInstance(m_StructInstanceHash.value(pNode->m_Id));
                        pInstance->move(pNode->m_Matrix);
                        //qDebug() << "Instance move with this matrix :" << pNode->m_Matrix.toString();
                        pOccurence= new GLC_StructOccurence(pInstance);
                }
                else
                {
                        const int size= pNode->m_InstanceGeometryIDs.size();
                        GLC_3DRep* pRep= NULL;
                        for (int i= 0; i < size; ++i)
                        {
                                const QString geometryId= pNode->m_InstanceGeometryIDs.at(i);
                                if (NULL == pRep)
                                {
                                        pRep= new GLC_3DRep(*(m_3DRepHash.value(geometryId)));
                                }
                                else
                                {
                                        pRep->merge(m_3DRepHash.value(geometryId));
                                }
                        }
                        if (NULL != pRep)
                        {
                                GLC_StructReference* pStructRef= NULL;
                                if (pRep->isEmpty())
                                {
                                        qDebug() << "Empty rep : " << pRep->name();
                                        delete pRep;
                                        pRep= NULL;
                                }
                                else
                                {
                                        pStructRef= new GLC_StructReference(pRep);
                                        pInstance= new GLC_StructInstance(pStructRef);

                                        // Save instance in instance hash Table
                                        m_StructInstanceHash.insert(pNode->m_Id, pInstance);

                                        pInstance->move(pNode->m_Matrix);
                                        //qDebug() << "Instance move with this matrix :" << pNode->m_Matrix.toString();
                                        pOccurence= new GLC_StructOccurence(pInstance);
                                }

                        }
                        else qDebug() << "Geometry Id Not found";
                }
        }
        if (!pNode->m_ChildNodes.isEmpty())
        {
                if (NULL == pOccurence) //  The node hasn't geometry -> Create an occurence
                {
                        if (m_StructInstanceHash.contains(pNode->m_Id))
                        {
                                pInstance= new GLC_StructInstance(m_StructInstanceHash.value(pNode->m_Id));
                        }
                        else
                        {
                                GLC_StructReference* pStructRef= new GLC_StructReference(pNode->m_Id);
                                pInstance= new GLC_StructInstance(pStructRef);
                        }

                        pInstance->move(pNode->m_Matrix);
                        pOccurence= new GLC_StructOccurence(pInstance);
                }

                const int size= pNode->m_ChildNodes.size();
                for (int i= 0; i < size; ++i)
                {
                        if (NULL != pNode->m_ChildNodes.at(i))
                        {
                                pOccurence->addChild(createOccurenceFromNode(pNode->m_ChildNodes.at(i)));
                        }
                }
        }
        if (!pNode->m_InstanceOffNodeIds.isEmpty())
        {
                if (NULL == pOccurence) //  The node hasn't geometry and childs -> Create an occurence
                {
                        if (m_StructInstanceHash.contains(pNode->m_Id))
                        {
                                pInstance= new GLC_StructInstance(m_StructInstanceHash.value(pNode->m_Id));
                        }
                        else
                        {
                                GLC_StructReference* pStructRef= new GLC_StructReference(pNode->m_Id);
                                pInstance= new GLC_StructInstance(pStructRef);
                        }

                        pInstance->move(pNode->m_Matrix);
                        pOccurence= new GLC_StructOccurence(pInstance);
                }

                const int size= pNode->m_InstanceOffNodeIds.size();
                for (int i= 0; i < size; ++i)
                {
                        if (m_ColladaNodeHash.contains(pNode->m_InstanceOffNodeIds.at(i)))
                        {
                                pOccurence->addChild(createOccurenceFromNode(m_ColladaNodeHash.value(pNode->m_InstanceOffNodeIds.at(i))));
                        }
                        else
                        {
                                const QString errorMsg= "Instance Node : " + pNode->m_InstanceOffNodeIds.at(i) + "Not Found";
                                throwException(errorMsg);
                        }
                }
        }
        if (NULL == pOccurence)
        {
                qDebug() << "Empty Node";
                if (m_StructInstanceHash.contains(pNode->m_Id))
                {
                        pInstance= new GLC_StructInstance(m_StructInstanceHash.value(pNode->m_Id));
                }
                else
                {
                        GLC_StructReference* pStructRef= new GLC_StructReference(pNode->m_Id);
                        pInstance= new GLC_StructInstance(pStructRef);
                }

                pInstance->move(pNode->m_Matrix);
                pOccurence= new GLC_StructOccurence(pInstance);
        }

        return pOccurence;
}

// Update progress bar
void GLC_ColladaToWorld::updateProgressBar()
{
        qint64 currentOffset= m_pStreamReader->characterOffset();

        int currentQuantumValue;
        // Progrees bar indicator
        currentQuantumValue = static_cast<int>((static_cast<double>(currentOffset) / m_FileSize) * 100);
        if (currentQuantumValue > m_CurrentOffset)
        {
                emit currentQuantum(currentQuantumValue);
                m_CurrentOffset= currentQuantumValue;
        }

}