glc_mesh.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, packaged on July 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 Lesser General Public License as published by
 the Free Software Foundation; either version 3 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 Lesser General Public License for more details.

 You should have received a copy of the GNU Lesser 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_mesh.h"
#include "../glc_renderstatistics.h"

// Class chunk id
quint32 GLC_Mesh::m_ChunkId= 0xA701;

GLC_Mesh::GLC_Mesh()
:GLC_Geometry("Mesh", false)
, m_NextPrimitiveLocalId(1)
, m_PrimitiveGroups()
, m_DefaultMaterialId(0)
, m_NumberOfVertice(0)
, m_NumberOfNormals(0)
, m_ColorPearVertex(false)
, m_MeshData()
, m_CurrentLod(0)
{

}

GLC_Mesh::GLC_Mesh(const GLC_Mesh& mesh)
:GLC_Geometry(mesh)
, m_NextPrimitiveLocalId(mesh.m_NextPrimitiveLocalId)
, m_PrimitiveGroups(mesh.m_PrimitiveGroups)
, m_DefaultMaterialId(mesh.m_DefaultMaterialId)
, m_NumberOfVertice(mesh.m_NumberOfVertice)
, m_NumberOfNormals(mesh.m_NumberOfNormals)
, m_ColorPearVertex(mesh.m_ColorPearVertex)
, m_MeshData(mesh.m_MeshData)
, m_CurrentLod(0)
{
        // Make a copy of m_PrimitiveGroups with new material id
        PrimitiveGroupsHash::const_iterator iPrimitiveGroups= mesh.m_PrimitiveGroups.constBegin();
        while (mesh.m_PrimitiveGroups.constEnd() != iPrimitiveGroups)
        {
                LodPrimitiveGroups* pPrimitiveGroups= new LodPrimitiveGroups();
                m_PrimitiveGroups.insert(iPrimitiveGroups.key(), pPrimitiveGroups);

                LodPrimitiveGroups::const_iterator iPrimitiveGroup= iPrimitiveGroups.value()->constBegin();
                while (iPrimitiveGroups.value()->constEnd() != iPrimitiveGroup)
                {
                        GLC_PrimitiveGroup* pPrimitiveGroup= new GLC_PrimitiveGroup(*(iPrimitiveGroup.value()), iPrimitiveGroup.key());
                        pPrimitiveGroups->insert(iPrimitiveGroup.key(), pPrimitiveGroup);

                        ++iPrimitiveGroup;
                }

                ++iPrimitiveGroups;
        }

}

// Overload "=" operator
GLC_Mesh& GLC_Mesh::operator=(const GLC_Mesh& mesh)
{
        if (this != &mesh)
        {
                // Call the operator of the super class
                GLC_Geometry::operator=(mesh);

                // Clear the mesh
                clearMeshWireAndBoundingBox();

                // Copy members
                m_NextPrimitiveLocalId= mesh.m_NextPrimitiveLocalId;
                m_PrimitiveGroups= mesh.m_PrimitiveGroups;
                m_DefaultMaterialId= mesh.m_DefaultMaterialId;
                m_NumberOfVertice= mesh.m_NumberOfVertice;
                m_NumberOfNormals= mesh.m_NumberOfNormals;
                m_ColorPearVertex= mesh.m_ColorPearVertex;
                m_MeshData= mesh.m_MeshData;
                m_CurrentLod= 0;

                // Make a copy of m_PrimitiveGroups with new material id
                PrimitiveGroupsHash::const_iterator iPrimitiveGroups= mesh.m_PrimitiveGroups.constBegin();
                while (mesh.m_PrimitiveGroups.constEnd() != iPrimitiveGroups)
                {
                        LodPrimitiveGroups* pPrimitiveGroups= new LodPrimitiveGroups();
                        m_PrimitiveGroups.insert(iPrimitiveGroups.key(), pPrimitiveGroups);

                        LodPrimitiveGroups::const_iterator iPrimitiveGroup= iPrimitiveGroups.value()->constBegin();
                        while (iPrimitiveGroups.value()->constEnd() != iPrimitiveGroup)
                        {
                                GLC_PrimitiveGroup* pPrimitiveGroup= new GLC_PrimitiveGroup(*(iPrimitiveGroup.value()), iPrimitiveGroup.key());
                                pPrimitiveGroups->insert(iPrimitiveGroup.key(), pPrimitiveGroup);

                                ++iPrimitiveGroup;
                        }

                        ++iPrimitiveGroups;
                }
        }

        return *this;
}

// Destructor
GLC_Mesh::~GLC_Mesh()
{
        PrimitiveGroupsHash::iterator iGroups= m_PrimitiveGroups.begin();
        while (iGroups != m_PrimitiveGroups.constEnd())
        {
                LodPrimitiveGroups::iterator iGroup= iGroups.value()->begin();
                while (iGroup != iGroups.value()->constEnd())
                {
                        delete iGroup.value();

                        ++iGroup;
                }
                delete iGroups.value();
                ++iGroups;
        }
}

// Get Functions
// Return the class Chunk ID
quint32 GLC_Mesh::chunckID()
{
        return m_ChunkId;
}

// Get number of faces
unsigned int GLC_Mesh::faceCount(int lod) const
{
        return m_MeshData.trianglesCount(lod);
}

// Get number of vertex
unsigned int GLC_Mesh::VertexCount() const
{
        return m_NumberOfVertice;
}

// return the mesh bounding box
const GLC_BoundingBox& GLC_Mesh::boundingBox()
{
        if (NULL == m_pBoundingBox)
        {
                //qDebug() << "GLC_Mesh2::boundingBox create boundingBox";
                m_pBoundingBox= new GLC_BoundingBox();

                if (m_MeshData.positionVectorHandle()->isEmpty())
                {
                        qDebug() << "GLC_ExtendedMesh::getBoundingBox empty m_Positions";
                }
                else
                {
                        GLfloatVector* pVertexVector= m_MeshData.positionVectorHandle();
                        const int max= pVertexVector->size();
                        for (int i= 0; i < max; i= i + 3)
                        {
                                GLC_Vector3d vector((*pVertexVector)[i], (*pVertexVector)[i + 1], (*pVertexVector)[i + 2]);
                                m_pBoundingBox->combine(vector);
                        }
                }
                // Combine with the wiredata bounding box
                m_pBoundingBox->combine(m_WireData.boundingBox());
        }
        return *m_pBoundingBox;

}

// Return a copy of the Mesh as GLC_Geometry pointer
GLC_Geometry* GLC_Mesh::clone() const
{
        return new GLC_Mesh(*this);
}

// Return true if the mesh contains triangles
bool GLC_Mesh::containsTriangles(int lod, GLC_uint materialId) const
{
        // Check if the lod exist and material exists
        Q_ASSERT(m_PrimitiveGroups.contains(lod));
        if (!m_PrimitiveGroups.value(lod)->contains(materialId)) return false;
        else return m_PrimitiveGroups.value(lod)->value(materialId)->containsTriangles();
}

// Return the specified index
QVector<GLuint> GLC_Mesh::getTrianglesIndex(int lod, GLC_uint materialId) const
{
        // Check if the mesh contains triangles
        Q_ASSERT(containsTriangles(lod, materialId));

        GLC_PrimitiveGroup* pPrimitiveGroup= m_PrimitiveGroups.value(lod)->value(materialId);

        int offset= 0;
        if (GLC_State::vboUsed())
        {
                offset= static_cast<int>(reinterpret_cast<GLsizeiptr>(pPrimitiveGroup->trianglesIndexOffset()) / sizeof(GLuint));
        }
        else
        {
                offset= pPrimitiveGroup->trianglesIndexOffseti();
        }
        const int size= pPrimitiveGroup->trianglesIndexSize();

        QVector<GLuint> resultIndex(size);

        memcpy((void*)resultIndex.data(), &(m_MeshData.indexVector(lod).data())[offset], size * sizeof(GLuint));

        return resultIndex;
}

// Return the number of triangles
int GLC_Mesh::numberOfTriangles(int lod, GLC_uint materialId) const
{
        // Check if the lod exist and material exists
        if (!m_PrimitiveGroups.contains(lod))return 0;
        else if (!m_PrimitiveGroups.value(lod)->contains(materialId)) return 0;
        else return m_PrimitiveGroups.value(lod)->value(materialId)->trianglesIndexSize();
}

// Return true if the mesh contains trips
bool GLC_Mesh::containsStrips(int lod, GLC_uint materialId) const
{
        // Check if the lod exist and material exists
        if (!m_PrimitiveGroups.contains(lod))return false;
        else if (!m_PrimitiveGroups.value(lod)->contains(materialId)) return false;
        else return m_PrimitiveGroups.value(lod)->value(materialId)->containsStrip();

}

// Return the strips index
QList<QVector<GLuint> > GLC_Mesh::getStripsIndex(int lod, GLC_uint materialId) const
{
        // Check if the mesh contains trips
        Q_ASSERT(containsStrips(lod, materialId));

        GLC_PrimitiveGroup* pPrimitiveGroup= m_PrimitiveGroups.value(lod)->value(materialId);

        QList<int> offsets;
        QList<int> sizes;
        int stripsCount;

        if (GLC_State::vboUsed())
        {
                stripsCount= pPrimitiveGroup->stripsOffset().size();
                for (int i= 0; i < stripsCount; ++i)
                {
                        offsets.append(static_cast<int>(reinterpret_cast<GLsizeiptr>(pPrimitiveGroup->stripsOffset().at(i)) / sizeof(GLuint)));
                        sizes.append(static_cast<int>(pPrimitiveGroup->stripsSizes().at(i)));
                }
        }
        else
        {
                stripsCount= pPrimitiveGroup->stripsOffseti().size();
                for (int i= 0; i < stripsCount; ++i)
                {
                        offsets.append(static_cast<int>(pPrimitiveGroup->stripsOffseti().at(i)));
                        sizes.append(static_cast<int>(pPrimitiveGroup->stripsSizes().at(i)));
                }

        }
        // The result list of vector
        QList<QVector<GLuint> > result;
        // The copy of the mesh Data LOD index vector
        QVector<GLuint> SourceIndex(m_MeshData.indexVector(lod));
        for (int i= 0; i < stripsCount; ++i)
        {
                QVector<GLuint> currentStrip(sizes.at(i));
                memcpy((void*)currentStrip.data(), &(SourceIndex.data())[offsets.at(i)], sizes.at(i) * sizeof(GLuint));
                result.append(currentStrip);
        }

        return result;
}

// Return the number of strips
int GLC_Mesh::numberOfStrips(int lod, GLC_uint materialId) const
{
        // Check if the lod exist and material exists
        if (!m_PrimitiveGroups.contains(lod))return 0;
        else if (!m_PrimitiveGroups.value(lod)->contains(materialId)) return 0;
        else return m_PrimitiveGroups.value(lod)->value(materialId)->stripsSizes().size();
}

// Return true if the mesh contains fans
bool GLC_Mesh::containsFans(int lod, GLC_uint materialId) const
{
        // Check if the lod exist and material exists
        if (!m_PrimitiveGroups.contains(lod))return false;
        else if (!m_PrimitiveGroups.value(lod)->contains(materialId)) return false;
        else return m_PrimitiveGroups.value(lod)->value(materialId)->containsFan();

}

int GLC_Mesh::numberOfFans(int lod, GLC_uint materialId) const
{
        // Check if the lod exist and material exists
        if(!m_PrimitiveGroups.contains(lod))return 0;
        else if (!m_PrimitiveGroups.value(lod)->contains(materialId)) return 0;
        else return m_PrimitiveGroups.value(lod)->value(materialId)->fansSizes().size();
}

// Return the strips index
QList<QVector<GLuint> > GLC_Mesh::getFansIndex(int lod, GLC_uint materialId) const
{
        // Check if the mesh contains trips
        Q_ASSERT(containsFans(lod, materialId));

        GLC_PrimitiveGroup* pPrimitiveGroup= m_PrimitiveGroups.value(lod)->value(materialId);

        QList<int> offsets;
        QList<int> sizes;
        int fansCount;

        if (GLC_State::vboUsed())
        {
                fansCount= pPrimitiveGroup->fansOffset().size();
                for (int i= 0; i < fansCount; ++i)
                {
                        offsets.append(static_cast<int>(reinterpret_cast<GLsizeiptr>(pPrimitiveGroup->fansOffset().at(i)) / sizeof(GLuint)));
                        sizes.append(static_cast<int>(pPrimitiveGroup->fansSizes().at(i)));
                }
        }
        else
        {
                fansCount= pPrimitiveGroup->fansOffseti().size();
                for (int i= 0; i < fansCount; ++i)
                {
                        offsets.append(static_cast<int>(pPrimitiveGroup->fansOffseti().at(i)));
                        sizes.append(static_cast<int>(pPrimitiveGroup->fansSizes().at(i)));
                }

        }
        // The result list of vector
        QList<QVector<GLuint> > result;
        // The copy of the mesh Data LOD index vector
        QVector<GLuint> SourceIndex(m_MeshData.indexVector(lod));
        for (int i= 0; i < fansCount; ++i)
        {
                QVector<GLuint> currentFan(sizes.at(i));
                memcpy((void*)currentFan.data(), &(SourceIndex.data())[offsets.at(i)], sizes.at(i) * sizeof(GLuint));
                result.append(currentFan);
        }

        return result;
}

// Set Functions

// Clear the content of the mesh and super class GLC_Geometry
void GLC_Mesh::clear()
{
        // Clear the mesh content
        clearMeshWireAndBoundingBox();

        // Clear the super class GLC_Geometry
        GLC_Geometry::clear();
}


// Clear the content off the mesh and makes it empty
void GLC_Mesh::clearMeshWireAndBoundingBox()
{
        // Reset primitive local id
        m_NextPrimitiveLocalId= 1;

        // Remove all primitive groups
        PrimitiveGroupsHash::iterator iGroups= m_PrimitiveGroups.begin();
        while (iGroups != m_PrimitiveGroups.constEnd())
        {
                LodPrimitiveGroups::iterator iGroup= iGroups.value()->begin();
                while (iGroup != iGroups.value()->constEnd())
                {
                        delete iGroup.value();

                        ++iGroup;
                }
                delete iGroups.value();
                ++iGroups;
        }
        m_PrimitiveGroups.clear();

        m_DefaultMaterialId= 0;
        m_NumberOfVertice= 0;
        m_NumberOfNormals= 0;
        m_IsSelected= false;
        m_ColorPearVertex= false;
        // Clear data of the mesh
        m_MeshData.clear();
        m_CurrentLod= 0;

        GLC_Geometry::clearWireAndBoundingBox();
}

// Add triangles
GLC_uint GLC_Mesh::addTriangles(GLC_Material* pMaterial, const IndexList& indexList, const int lod, double accuracy)
{
        GLC_uint groupId= setCurrentMaterial(pMaterial, lod, accuracy);
        Q_ASSERT(m_PrimitiveGroups.value(lod)->contains(groupId));
        Q_ASSERT(!indexList.isEmpty());

        GLC_uint id= 0;
        if (0 == lod)
        {
                id= m_NextPrimitiveLocalId++;
        }
        m_MeshData.trianglesAdded(lod, indexList.size() / 3);

        m_PrimitiveGroups.value(lod)->value(groupId)->addTriangles(indexList, id);

        // Invalid the geometry
        m_GeometryIsValid = false;

        return id;
}

// Add triangles Strip ans return his id
GLC_uint GLC_Mesh::addTrianglesStrip(GLC_Material* pMaterial, const IndexList& indexList, const int lod, double accuracy)
{
        GLC_uint groupId= setCurrentMaterial(pMaterial, lod, accuracy);
        Q_ASSERT(m_PrimitiveGroups.value(lod)->contains(groupId));
        Q_ASSERT(!indexList.isEmpty());

        GLC_uint id= 0;
        if (0 == lod)
        {
                id= m_NextPrimitiveLocalId++;
        }
        m_MeshData.trianglesAdded(lod, indexList.size() - 2);

        m_PrimitiveGroups.value(lod)->value(groupId)->addTrianglesStrip(indexList, id);

        // Invalid the geometry
        m_GeometryIsValid = false;

        return id;
}
// Add triangles Fan
GLC_uint GLC_Mesh::addTrianglesFan(GLC_Material* pMaterial, const IndexList& indexList, const int lod, double accuracy)
{
        GLC_uint groupId= setCurrentMaterial(pMaterial, lod, accuracy);
        Q_ASSERT(m_PrimitiveGroups.value(lod)->contains(groupId));
        Q_ASSERT(!indexList.isEmpty());

        GLC_uint id= 0;
        if (0 == lod)
        {
                id= m_NextPrimitiveLocalId++;
        }
        m_MeshData.trianglesAdded(lod, indexList.size() - 2);
        m_PrimitiveGroups.value(lod)->value(groupId)->addTrianglesFan(indexList, id);

        // Invalid the geometry
        m_GeometryIsValid = false;

        return id;
}

// Reverse mesh normal
void GLC_Mesh::reverseNormals()
{
        GLfloatVector* pNormalVector= m_MeshData.normalVectorHandle();
        if (pNormalVector->isEmpty())
        {
                (*m_MeshData.normalVectorHandle())= m_MeshData.normalVector();
        }
        const int size= pNormalVector->size();
        for (int i= 0; i < size; ++i)
        {
                (*pNormalVector)[i]= - pNormalVector->at(i);
        }
        // Invalid the geometry
        m_GeometryIsValid = false;
}

// Copy index list in a vector for Vertex Array Use
void GLC_Mesh::finish()
{
        boundingBox();

        m_MeshData.finishLod();

        if (GLC_State::vboUsed())
        {
                finishVbo();
        }
        else
        {
                finishNonVbo();
        }

        //qDebug() << "Mesh mem size= " << memmorySize();
}


// Set the lod Index
void GLC_Mesh::setCurrentLod(const int value)
{
        if (value)
        {
                const int numberOfLod= m_MeshData.lodCount() - 1;
                // Clamp value to number of load
                m_CurrentLod= qRound(static_cast<int>((static_cast<double>(value) / 100.0) * numberOfLod));
        }
        else
        {
                m_CurrentLod= 0;
        }
}
// Replace the Master material
void GLC_Mesh::replaceMasterMaterial(GLC_Material* pMat)
{
        if (hasMaterial())
        {
                GLC_uint oldId= firstMaterial()->id();
                replaceMaterial(oldId, pMat);
        }
        else
        {
                addMaterial(pMat);
        }
}

// Replace the material specified by id with another one
void GLC_Mesh::replaceMaterial(const GLC_uint oldId, GLC_Material* pMat)
{
        Q_ASSERT(containsMaterial(oldId));
        Q_ASSERT(!containsMaterial(pMat->id()) || (pMat->id() == oldId));

        if (pMat->id() != oldId)
        {
                // Iterate over Level of detail
                PrimitiveGroupsHash::const_iterator iGroups= m_PrimitiveGroups.constBegin();
                while (m_PrimitiveGroups.constEnd() != iGroups)
                {
                        LodPrimitiveGroups* pPrimitiveGroups= iGroups.value();
                        // Iterate over material group
                        LodPrimitiveGroups::iterator iGroup= pPrimitiveGroups->begin();
                        while (pPrimitiveGroups->constEnd() != iGroup)
                        {
                                if (iGroup.key() == oldId)
                                {
                                        GLC_PrimitiveGroup* pGroup= iGroup.value();
                                        // Erase old group pointer
                                        pPrimitiveGroups->erase(iGroup);
                                        // Change the group ID
                                        pGroup->setId(pMat->id());
                                        // Add the group with  new ID
                                        pPrimitiveGroups->insert(pMat->id(), pGroup);
                                        iGroup= pPrimitiveGroups->end();
                                }
                                else
                                {
                                        ++iGroup;
                                }
                        }
                        ++iGroups;
                }
        }

        if (pMat != m_MaterialHash.value(oldId))
        {
                // Remove old material
                removeMaterial(oldId);

                addMaterial(pMat);
        }

}

void GLC_Mesh::copyVboToClientSide()
{
        m_MeshData.copyVboToClientSide();
        GLC_Geometry::copyVboToClientSide();
}

void GLC_Mesh::releaseVboClientSide(bool update)
{
        m_MeshData.releaseVboClientSide(update);
        GLC_Geometry::releaseVboClientSide(update);
}

// Load the mesh from binary data stream
void GLC_Mesh::loadFromDataStream(QDataStream& stream, const MaterialHash& materialHash, const QHash<GLC_uint, GLC_uint>& materialIdMap)
{
        quint32 chunckId;
        stream >> chunckId;
        Q_ASSERT(chunckId == m_ChunkId);

        // The mesh name
        QString meshName;
        stream >> meshName;
        setName(meshName);

        // The wire data
        stream >> GLC_Geometry::m_WireData;

        // The mesh next primitive local id
        GLC_uint localId;
        stream >> localId;
        setNextPrimitiveLocalId(localId);

        // Retrieve geom mesh data
        stream >> m_MeshData;

        // Retrieve primitiveGroupLodList
        QList<int> primitiveGroupLodList;
        stream >> primitiveGroupLodList;

        // Retrieve primitiveGroup list
        QList<QList<GLC_PrimitiveGroup> > primitiveListOfGroupList;
        stream >> primitiveListOfGroupList;

        // Construct mesh primitiveGroupHash
        const int lodCount= primitiveGroupLodList.size();
        for (int i= 0; i < lodCount; ++i)
        {
                GLC_Mesh::LodPrimitiveGroups* pCurrentPrimitiveGroup= new GLC_Mesh::LodPrimitiveGroups();
                m_PrimitiveGroups.insert(primitiveGroupLodList.at(i), pCurrentPrimitiveGroup);
                const int groupCount= primitiveListOfGroupList.at(i).size();
                for (int iGroup= 0; iGroup < groupCount; ++iGroup)
                {
                        Q_ASSERT(materialIdMap.contains(primitiveListOfGroupList.at(i).at(iGroup).id()));
                        const GLC_uint newId= materialIdMap.value(primitiveListOfGroupList.at(i).at(iGroup).id());
                        // Test if the mesh contains the material
                        if (!containsMaterial(newId))
                        {
                                addMaterial(materialHash.value(newId));
                        }
                        GLC_PrimitiveGroup* pGroup= new GLC_PrimitiveGroup(primitiveListOfGroupList.at(i).at(iGroup), newId);

                        Q_ASSERT(! m_PrimitiveGroups.value(primitiveGroupLodList.at(i))->contains(newId));
                        m_PrimitiveGroups.value(primitiveGroupLodList.at(i))->insert(newId, pGroup);
                }
        }
        stream >> m_NumberOfVertice;
        stream >> m_NumberOfNormals;

        finishSerialized();
        //qDebug() << "Mesh mem size= " << memmorySize();
}

// Save the mesh to binary data stream
void GLC_Mesh::saveToDataStream(QDataStream& stream) const
{
        quint32 chunckId= m_ChunkId;
        stream << chunckId;

        // The mesh name
        stream << name();

        // The wire data
        stream << m_WireData;

        // The mesh next primitive local id
        stream << nextPrimitiveLocalId();

        // Mesh data serialisation
        stream << m_MeshData;

        // Primitive groups serialisation
        QList<int> primitiveGroupLodList;
        QList<QList<GLC_PrimitiveGroup> > primitiveListOfGroupList;

        GLC_Mesh::PrimitiveGroupsHash::const_iterator iGroupsHash= m_PrimitiveGroups.constBegin();
        while (m_PrimitiveGroups.constEnd() != iGroupsHash)
        {
                primitiveGroupLodList.append(iGroupsHash.key());
                QList<GLC_PrimitiveGroup> primitiveGroupList;
                GLC_Mesh::LodPrimitiveGroups::const_iterator iGroups= iGroupsHash.value()->constBegin();
                while (iGroupsHash.value()->constEnd() != iGroups)
                {
                        primitiveGroupList.append(*(iGroups.value()));
                        ++iGroups;
                }
                primitiveListOfGroupList.append(primitiveGroupList);
                ++iGroupsHash;
        }
        stream << primitiveGroupLodList;
        stream << primitiveListOfGroupList;

        stream << m_NumberOfVertice;
        stream << m_NumberOfNormals;
}

// OpenGL Functions

// Virtual interface for OpenGL Geometry set up.
void GLC_Mesh::glDraw(const GLC_RenderProperties& renderProperties)
{
        Q_ASSERT(m_GeometryIsValid || !m_MeshData.normalVectorHandle()->isEmpty());

        const bool vboIsUsed= GLC_State::vboUsed();

        if (m_IsSelected && (renderProperties.renderingMode() == glc::PrimitiveSelected) && !GLC_State::isInSelectionMode()
        && !renderProperties.setOfSelectedPrimitiveIdIsEmpty())
        {
                m_CurrentLod= 0;
        }

        if (vboIsUsed)
        {
                m_MeshData.createVBOs();

                // Create VBO and IBO
                if (!m_GeometryIsValid && !m_MeshData.positionVectorHandle()->isEmpty())
                {
                        fillVbosAndIbos();
                }
                else if (!m_GeometryIsValid && !m_MeshData.normalVectorHandle()->isEmpty())
                {
                        // Normals has been inversed update normal vbo
                        m_MeshData.useVBO(true, GLC_MeshData::GLC_Normal);

                        GLfloatVector* pNormalVector= m_MeshData.normalVectorHandle();
                        const GLsizei dataNbr= static_cast<GLsizei>(pNormalVector->size());
                        const GLsizeiptr dataSize= dataNbr * sizeof(GLfloat);
                        glBufferData(GL_ARRAY_BUFFER, dataSize, pNormalVector->data(), GL_STATIC_DRAW);
                        m_MeshData.normalVectorHandle()->clear();
                }

                // Activate mesh VBOs and IBO of the current LOD
                activateVboAndIbo();
        }
        else
        {
                activateVertexArray();
        }

        if (GLC_State::isInSelectionMode())
        {
                if (renderProperties.renderingMode() == glc::PrimitiveSelection)
                {
                        primitiveSelectionRenderLoop(vboIsUsed);
                }
                else if (renderProperties.renderingMode() == glc::BodySelection)
                {
                        bodySelectionRenderLoop(vboIsUsed);
                }
                else
                {
                        normalRenderLoop(renderProperties, vboIsUsed);
                }
        }
        else if (m_IsSelected)
        {
                if (renderProperties.renderingMode() == glc::PrimitiveSelected)
                {
                        if (!renderProperties.setOfSelectedPrimitiveIdIsEmpty())
                        {
                                primitiveSelectedRenderLoop(renderProperties, vboIsUsed);
                        }
                        else
                        {
                                m_IsSelected= false;
                                if ((m_CurrentLod == 0) && (renderProperties.savedRenderingMode() == glc::OverwritePrimitiveMaterial) && !renderProperties.hashOfOverwritePrimitiveMaterialsIsEmpty())
                                        primitiveRenderLoop(renderProperties, vboIsUsed);
                                else
                                        normalRenderLoop(renderProperties, vboIsUsed);
                                m_IsSelected= true;
                        }
                }
                else
                {
                        normalRenderLoop(renderProperties, vboIsUsed);
                }
        }
        else
        {
                // Choose the accurate render loop
                switch (renderProperties.renderingMode())
                {
                case glc::NormalRenderMode:
                        normalRenderLoop(renderProperties, vboIsUsed);
                        break;
                case glc::OverwriteMaterial:
                        OverwriteMaterialRenderLoop(renderProperties, vboIsUsed);
                        break;
                case glc::OverwriteTransparency:
                        OverwriteTransparencyRenderLoop(renderProperties, vboIsUsed);
                        break;
                case glc::OverwritePrimitiveMaterial:
                        if ((m_CurrentLod == 0) && !renderProperties.hashOfOverwritePrimitiveMaterialsIsEmpty())
                                primitiveRenderLoop(renderProperties, vboIsUsed);
                        else
                                normalRenderLoop(renderProperties, vboIsUsed);
                        break;
                default:
                        Q_ASSERT(false);
                        break;
                }
        }


        // Restore client state
        if (vboIsUsed)
        {
                m_MeshData.useIBO(false);
                m_MeshData.useVBO(false, GLC_MeshData::GLC_Normal);
        }

        if (m_ColorPearVertex && !m_IsSelected && !GLC_State::isInSelectionMode())
        {
                glDisableClientState(GL_COLOR_ARRAY);
                glDisable(GL_COLOR_MATERIAL);
        }

        glDisableClientState(GL_VERTEX_ARRAY);
        glDisableClientState(GL_NORMAL_ARRAY);
        glDisableClientState(GL_TEXTURE_COORD_ARRAY);

        // Draw mesh's wire if necessary
        if ((renderProperties.renderingFlag() == glc::WireRenderFlag) && !m_WireData.isEmpty() && !GLC_Geometry::typeIsWire())
        {
                if (!GLC_State::isInSelectionMode())
                {
                        glDisable(GL_LIGHTING);
                        // Set polyline colors
                        GLfloat color[4]= {static_cast<float>(m_WireColor.redF()),
                                                                        static_cast<float>(m_WireColor.greenF()),
                                                                        static_cast<float>(m_WireColor.blueF()),
                                                                        static_cast<float>(m_WireColor.alphaF())};

                        glColor4fv(color);
                        m_WireData.glDraw(renderProperties);
                        glEnable(GL_LIGHTING);
                }
                else
                {
                        m_WireData.glDraw(renderProperties);
                }
        }

        // Update statistics
        GLC_RenderStatistics::addBodies(1);
        GLC_RenderStatistics::addTriangles(m_MeshData.trianglesCount(m_CurrentLod));
}

// Private services Functions

// Set the current material
GLC_uint GLC_Mesh::setCurrentMaterial(GLC_Material* pMaterial, int lod, double accuracy)
{

        // Test if a primitive group hash exists for the specified lod
        if (!m_PrimitiveGroups.contains(lod))
        {
                m_PrimitiveGroups.insert(lod, new LodPrimitiveGroups());

                m_MeshData.appendLod(accuracy);
        }

        GLC_uint returnId;
        if (NULL == pMaterial)
        {
                returnId= m_DefaultMaterialId; // Default material id

                // Test if the material has been already load
                if (m_DefaultMaterialId == 0)
                {
                        pMaterial= new GLC_Material();
                        // Add the material to the mesh
                        addMaterial(pMaterial);
                        m_DefaultMaterialId= pMaterial->id();
                        returnId= m_DefaultMaterialId;

                }
                // Test if a primitive group for this material exist
                if (!m_PrimitiveGroups.value(lod)->contains(returnId))
                {
                        m_PrimitiveGroups.value(lod)->insert(returnId, new GLC_PrimitiveGroup(returnId));
                }
        }
        else
        {
                returnId= pMaterial->id();
                // Test if the material has been already load
                if (!containsMaterial(returnId))
                {
                        // Add the material to the mesh
                        addMaterial(pMaterial);
                        m_PrimitiveGroups.value(lod)->insert(returnId, new GLC_PrimitiveGroup(returnId));

                }
                else if (!m_PrimitiveGroups.value(lod)->contains(returnId))
                {
                        // Add the material to the group
                        m_PrimitiveGroups.value(lod)->insert(returnId, new GLC_PrimitiveGroup(returnId));
                }
        }

        return returnId;
}

// Fill VBOs and IBOs
void GLC_Mesh::fillVbosAndIbos()
{
        // Create VBO of vertices
        m_MeshData.fillVbo(GLC_MeshData::GLC_Vertex);

        // Create VBO of normals
        m_MeshData.fillVbo(GLC_MeshData::GLC_Normal);

        // Create VBO of texel if needed
        m_MeshData.fillVbo(GLC_MeshData::GLC_Texel);

        // Create VBO of color if needed
        m_MeshData.fillVbo(GLC_MeshData::GLC_Color);

        const int lodNumber= m_MeshData.lodCount();
        for (int i= 0; i < lodNumber; ++i)
        {
                //Create LOD IBO
                if (!m_MeshData.indexVectorHandle(i)->isEmpty())
                {
                        QVector<GLuint>* pIndexVector= m_MeshData.indexVectorHandle(i);
                        m_MeshData.useIBO(true, i);
                        const GLsizei indexNbr= static_cast<GLsizei>(pIndexVector->size());
                        const GLsizeiptr indexSize = indexNbr * sizeof(GLuint);
                        glBufferData(GL_ELEMENT_ARRAY_BUFFER, indexSize, pIndexVector->data(), GL_STATIC_DRAW);
                }
        }
        // Remove client side data
        m_MeshData.finishVbo();

}
// set primitive group offset
void GLC_Mesh::finishSerialized()
{
        if (GLC_State::vboUsed())
        {
                PrimitiveGroupsHash::iterator iGroups= m_PrimitiveGroups.begin();
                while (iGroups != m_PrimitiveGroups.constEnd())
                {
                        LodPrimitiveGroups::iterator iGroup= iGroups.value()->begin();
                        while (iGroup != iGroups.value()->constEnd())
                        {
                                iGroup.value()->changeToVboMode();
                                ++iGroup;
                        }
                        ++iGroups;
                }
        }
}

// Move Indexs from the primitive groups to the mesh Data LOD and Set IBOs offsets
void GLC_Mesh::finishVbo()
{
        PrimitiveGroupsHash::iterator iGroups= m_PrimitiveGroups.begin();
        while (iGroups != m_PrimitiveGroups.constEnd())
        {
                int currentLod= iGroups.key();
                LodPrimitiveGroups::iterator iGroup= iGroups.value()->begin();
                while (iGroup != iGroups.value()->constEnd())
                {
                        // Add group triangles index to mesh Data LOD triangles index vector
                        if (iGroup.value()->containsTriangles())
                        {
                                iGroup.value()->setTrianglesOffset(BUFFER_OFFSET(m_MeshData.indexVectorSize(currentLod) * sizeof(GLuint)));
                                (*m_MeshData.indexVectorHandle(currentLod))+= iGroup.value()->trianglesIndex().toVector();
                        }

                        // Add group strip index to mesh Data LOD strip index vector
                        if (iGroup.value()->containsStrip())
                        {
                                iGroup.value()->setBaseTrianglesStripOffset(BUFFER_OFFSET(m_MeshData.indexVectorSize(currentLod) * sizeof(GLuint)));
                                (*m_MeshData.indexVectorHandle(currentLod))+= iGroup.value()->stripsIndex().toVector();
                        }

                        // Add group fan index to mesh Data LOD fan index vector
                        if (iGroup.value()->containsFan())
                        {
                                iGroup.value()->setBaseTrianglesFanOffset(BUFFER_OFFSET(m_MeshData.indexVectorSize(currentLod) * sizeof(GLuint)));
                                (*m_MeshData.indexVectorHandle(currentLod))+= iGroup.value()->fansIndex().toVector();
                        }

                        iGroup.value()->finish();
                        ++iGroup;
                }
                ++iGroups;

        }
}

// Move Indexs from the primitive groups to the mesh Data LOD and Set Index offsets
void GLC_Mesh::finishNonVbo()
{
        //qDebug() << "GLC_Mesh::finishNonVbo()";
        PrimitiveGroupsHash::iterator iGroups= m_PrimitiveGroups.begin();
        while (iGroups != m_PrimitiveGroups.constEnd())
        {
                int currentLod= iGroups.key();
                LodPrimitiveGroups::iterator iGroup= iGroups.value()->begin();
                while (iGroup != iGroups.value()->constEnd())
                {
                        // Add group triangles index to mesh Data LOD triangles index vector
                        if (iGroup.value()->containsTriangles())
                        {
                                iGroup.value()->setTrianglesOffseti(m_MeshData.indexVectorSize(currentLod));
                                (*m_MeshData.indexVectorHandle(currentLod))+= iGroup.value()->trianglesIndex().toVector();
                        }

                        // Add group strip index to mesh Data LOD strip index vector
                        if (iGroup.value()->containsStrip())
                        {
                                iGroup.value()->setBaseTrianglesStripOffseti(m_MeshData.indexVectorSize(currentLod));
                                (*m_MeshData.indexVectorHandle(currentLod))+= iGroup.value()->stripsIndex().toVector();
                        }

                        // Add group fan index to mesh Data LOD fan index vector
                        if (iGroup.value()->containsFan())
                        {
                                iGroup.value()->setBaseTrianglesFanOffseti(m_MeshData.indexVectorSize(currentLod));
                                (*m_MeshData.indexVectorHandle(currentLod))+= iGroup.value()->fansIndex().toVector();
                        }

                        iGroup.value()->finish();
                        ++iGroup;
                }
                ++iGroups;
        }
}

// The normal display loop
void GLC_Mesh::normalRenderLoop(const GLC_RenderProperties& renderProperties, bool vboIsUsed)
{
        const bool isTransparent= (renderProperties.renderingFlag() == glc::TransparentRenderFlag);
        if ((!m_IsSelected || !isTransparent) || GLC_State::isInSelectionMode())
        {
                LodPrimitiveGroups::iterator iGroup= m_PrimitiveGroups.value(m_CurrentLod)->begin();
                while (iGroup != m_PrimitiveGroups.value(m_CurrentLod)->constEnd())
                {
                        GLC_PrimitiveGroup* pCurrentGroup= iGroup.value();
                        GLC_Material* pCurrentMaterial= m_MaterialHash.value(pCurrentGroup->id());

                        // Test if the current material is renderable
                        bool materialIsrenderable = (pCurrentMaterial->isTransparent() == isTransparent);

                        // Choose the material to render
                        if ((materialIsrenderable || m_IsSelected) && !GLC_State::isInSelectionMode())
                {
                                // Execute current material
                                pCurrentMaterial->glExecute();

                                if (m_IsSelected) GLC_SelectionMaterial::glExecute();
                        }

                        // Choose the primitives to render
                        if (m_IsSelected || GLC_State::isInSelectionMode() || materialIsrenderable)
                        {

                                if (vboIsUsed)
                                        vboDrawPrimitivesOf(pCurrentGroup);
                                else
                                        vertexArrayDrawPrimitivesOf(pCurrentGroup);
                        }

                        ++iGroup;
                }
        }
}

//  The overwrite material render loop
void GLC_Mesh::OverwriteMaterialRenderLoop(const GLC_RenderProperties& renderProperties, bool vboIsUsed)
{
        // Get the overwrite material
        GLC_Material* pOverwriteMaterial= renderProperties.overwriteMaterial();
        Q_ASSERT(NULL != pOverwriteMaterial);
        pOverwriteMaterial->glExecute();
        if (m_IsSelected) GLC_SelectionMaterial::glExecute();

        LodPrimitiveGroups::iterator iGroup= m_PrimitiveGroups.value(m_CurrentLod)->begin();
        while (iGroup != m_PrimitiveGroups.value(m_CurrentLod)->constEnd())
        {
                GLC_PrimitiveGroup* pCurrentGroup= iGroup.value();

                // Test if the current material is renderable
                bool materialIsrenderable = (pOverwriteMaterial->isTransparent() == (renderProperties.renderingFlag() == glc::TransparentRenderFlag));

                // Choose the primitives to render
                if (m_IsSelected || materialIsrenderable)
                {

                        if (vboIsUsed)
                                vboDrawPrimitivesOf(pCurrentGroup);
                        else
                                vertexArrayDrawPrimitivesOf(pCurrentGroup);
                }

                ++iGroup;
        }
}
// The overwrite transparency render loop
void GLC_Mesh::OverwriteTransparencyRenderLoop(const GLC_RenderProperties& renderProperties, bool vboIsUsed)
{
        // Get transparency value
        const float alpha= renderProperties.overwriteTransparency();
        Q_ASSERT(-1.0f != alpha);

        // Test if the current material is renderable
        bool materialIsrenderable = (renderProperties.renderingFlag() == glc::TransparentRenderFlag);

        if (materialIsrenderable || m_IsSelected)
        {
                LodPrimitiveGroups::iterator iGroup= m_PrimitiveGroups.value(m_CurrentLod)->begin();
                while (iGroup != m_PrimitiveGroups.value(m_CurrentLod)->constEnd())
                {
                        GLC_PrimitiveGroup* pCurrentGroup= iGroup.value();
                        GLC_Material* pCurrentMaterial= m_MaterialHash.value(pCurrentGroup->id());

                        // Execute current material
                        pCurrentMaterial->glExecute(alpha);

                        if (m_IsSelected) GLC_SelectionMaterial::glExecute();

                        // Choose the primitives to render
                        if (m_IsSelected || materialIsrenderable)
                        {

                                if (vboIsUsed)
                                        vboDrawPrimitivesOf(pCurrentGroup);
                                else
                                        vertexArrayDrawPrimitivesOf(pCurrentGroup);
                        }
                        ++iGroup;
                }
        }
}

// The body selection render loop
void GLC_Mesh::bodySelectionRenderLoop(bool vboIsUsed)
{
        Q_ASSERT(GLC_State::isInSelectionMode());

        LodPrimitiveGroups::iterator iGroup= m_PrimitiveGroups.value(m_CurrentLod)->begin();
        while (iGroup != m_PrimitiveGroups.value(m_CurrentLod)->constEnd())
        {
                GLC_PrimitiveGroup* pCurrentGroup= iGroup.value();

                if (vboIsUsed)
                        vboDrawPrimitivesOf(pCurrentGroup);
                else
                        vertexArrayDrawPrimitivesOf(pCurrentGroup);

                ++iGroup;
        }
}

// The primitive selection render loop
void GLC_Mesh::primitiveSelectionRenderLoop(bool vboIsUsed)
{
        Q_ASSERT(GLC_State::isInSelectionMode());

        LodPrimitiveGroups::iterator iGroup= m_PrimitiveGroups.value(m_CurrentLod)->begin();

        while (iGroup != m_PrimitiveGroups.value(m_CurrentLod)->constEnd())
        {
                GLC_PrimitiveGroup* pCurrentGroup= iGroup.value();

                if (vboIsUsed)
                        vboDrawInSelectionModePrimitivesOf(pCurrentGroup);
                else
                        vertexArrayDrawInSelectionModePrimitivesOf(pCurrentGroup);

                ++iGroup;
        }
}

// The primitive rendeder loop
void GLC_Mesh::primitiveRenderLoop(const GLC_RenderProperties& renderProperties, bool vboIsUsed)
{
        const bool isTransparent= (renderProperties.renderingFlag() == glc::TransparentRenderFlag);
        LodPrimitiveGroups::iterator iGroup= m_PrimitiveGroups.value(m_CurrentLod)->begin();
        while (iGroup != m_PrimitiveGroups.value(m_CurrentLod)->constEnd())
        {
                GLC_PrimitiveGroup* pCurrentGroup= iGroup.value();
                GLC_Material* pCurrentMaterial= m_MaterialHash.value(pCurrentGroup->id());

                // Test if the current material is renderable
                const bool materialIsrenderable = (pCurrentMaterial->isTransparent() == isTransparent);

                if (materialIsrenderable)
                {
                        pCurrentMaterial->glExecute();
                }
                if (vboIsUsed)
                        vboDrawPrimitivesGroupOf(pCurrentGroup, pCurrentMaterial, materialIsrenderable, isTransparent, renderProperties.hashOfOverwritePrimitiveMaterials());
                else
                        vertexArrayDrawPrimitivesGroupOf(pCurrentGroup, pCurrentMaterial, materialIsrenderable, isTransparent, renderProperties.hashOfOverwritePrimitiveMaterials());

                ++iGroup;
        }
}

// The primitive Selected render loop
void GLC_Mesh::primitiveSelectedRenderLoop(const GLC_RenderProperties& renderProperties, bool vboIsUsed)
{
        const bool isTransparent= (renderProperties.renderingFlag() == glc::TransparentRenderFlag);
        LodPrimitiveGroups::iterator iGroup= m_PrimitiveGroups.value(m_CurrentLod)->begin();
        while (iGroup != m_PrimitiveGroups.value(m_CurrentLod)->constEnd())
        {
                GLC_PrimitiveGroup* pCurrentGroup= iGroup.value();
                GLC_Material* pCurrentMaterial= m_MaterialHash.value(pCurrentGroup->id());

                // Test if the current material is renderable
                const bool materialIsrenderable = (pCurrentMaterial->isTransparent() == isTransparent);

                if (materialIsrenderable)
                {
                        pCurrentMaterial->glExecute();
                }

                if (vboIsUsed)
                        vboDrawSelectedPrimitivesGroupOf(pCurrentGroup, pCurrentMaterial, materialIsrenderable, isTransparent, renderProperties);
                else
                        vertexArrayDrawSelectedPrimitivesGroupOf(pCurrentGroup, pCurrentMaterial, materialIsrenderable, isTransparent, renderProperties);

                ++iGroup;
        }
}