glc_geometry.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 "../shading/glc_selectionmaterial.h"
#include "../glc_openglexception.h"
#include "../glc_state.h"
#include "glc_geometry.h"

// Constructor destructor
// Default constructor
GLC_Geometry::GLC_Geometry(const QString& name, const bool typeIsWire)
: m_GeometryIsValid(false)      // By default geometry is invalid
, m_pBoundingBox(NULL)
, m_MaterialHash()
, m_UseColorPerVertex(false)
, m_IsSelected(false)
, m_WireData()
, m_WireColor(Qt::black)
, m_LineWidth(1.0f)
, m_IsWire(typeIsWire)          // the geometry type
, m_TransparentMaterialNumber(0)
, m_Id(glc::GLC_GenGeomID())
, m_Name(name)
{

}
// Copy constructor
GLC_Geometry::GLC_Geometry(const GLC_Geometry& sourceGeom)
: m_GeometryIsValid(false)      // By default geometry is invalid
, m_pBoundingBox(NULL)
, m_MaterialHash(sourceGeom.m_MaterialHash)
, m_UseColorPerVertex(sourceGeom.m_UseColorPerVertex)
, m_IsSelected(false)
, m_WireData(sourceGeom.m_WireData)
, m_WireColor(sourceGeom.m_WireColor)
, m_LineWidth(sourceGeom.m_LineWidth)
, m_IsWire(sourceGeom.m_IsWire)
, m_TransparentMaterialNumber(sourceGeom.m_TransparentMaterialNumber)
, m_Id(glc::GLC_GenGeomID())
, m_Name(sourceGeom.m_Name)
{
        // Add this mesh to inner material
        MaterialHash::const_iterator i= sourceGeom.m_MaterialHash.constBegin();
    while (i != sourceGeom.m_MaterialHash.constEnd())
    {
        // update inner material use table
        i.value()->addGLC_Geom(this);
        ++i;
    }

        if (NULL != sourceGeom.m_pBoundingBox)
        {
                m_pBoundingBox= new GLC_BoundingBox(*sourceGeom.m_pBoundingBox);
        }
}

// Overload "=" operator
GLC_Geometry& GLC_Geometry::operator=(const GLC_Geometry& sourceGeom)
{
        if (this != &sourceGeom)
        {
                clear();
                m_GeometryIsValid= false;
                m_pBoundingBox= NULL;
                m_MaterialHash= sourceGeom.m_MaterialHash;
                m_UseColorPerVertex= sourceGeom.m_UseColorPerVertex;
                m_IsSelected= false;
                m_WireData= sourceGeom.m_WireData;
                m_WireColor= sourceGeom.m_WireColor;
                m_LineWidth= sourceGeom.m_LineWidth;
                m_IsWire= sourceGeom.m_IsWire;
                m_TransparentMaterialNumber= sourceGeom.m_TransparentMaterialNumber;
                m_Id= glc::GLC_GenGeomID();
                m_Name= sourceGeom.m_Name;
        }
        return *this;
}

GLC_Geometry::~GLC_Geometry()
{
        // delete mesh inner material
        {
                MaterialHash::const_iterator i= m_MaterialHash.begin();
            while (i != m_MaterialHash.constEnd())
            {
                // delete the material if necessary
                i.value()->delGLC_Geom(id());
                if (i.value()->isUnused()) delete i.value();
                ++i;
            }
        }
        m_MaterialHash.clear();

        delete m_pBoundingBox;

}

// Get Functions

// Get number of faces
unsigned int GLC_Geometry::faceCount() const
{
        return 0;
}

// Get number of vertex
unsigned int GLC_Geometry::VertexCount() const
{
        return 0;
}

// Set Functions
// Clear the content of the geometry and makes it empty
void GLC_Geometry::clear()
{
        clearGeometry();
}

// Replace the Master material
void GLC_Geometry::replaceMasterMaterial(GLC_Material* pMaterial)
{
        Q_ASSERT(!m_IsWire);
        if (!m_MaterialHash.isEmpty())
        {
                if (pMaterial != firstMaterial())
                {
                        // Remove the first material
                        MaterialHash::iterator iMaterial= m_MaterialHash.begin();
                        removeMaterial(iMaterial.value()->id());

                        // Add the new material
                        addMaterial(pMaterial);
                }
        }
        else
        {
                addMaterial(pMaterial);
        }
}
void GLC_Geometry::updateTransparentMaterialNumber()
{
        m_TransparentMaterialNumber= 0;
        MaterialHash::const_iterator iMat= m_MaterialHash.constBegin();
        while (iMat != m_MaterialHash.constEnd())
        {
                if (iMat.value()->isTransparent())
                {
                        ++m_TransparentMaterialNumber;
                }
                ++iMat;
        }
        if (m_WireColor.alpha() != 255)
        {
                qDebug() << "GLC_Geometry::updateTransparentMaterialNumber()";
                ++m_TransparentMaterialNumber;
        }
}

// Add material to mesh
void GLC_Geometry::addMaterial(GLC_Material* pMaterial)
{
        Q_ASSERT(!m_IsWire);

        if (pMaterial != NULL)
        {
                const GLC_uint materialID= pMaterial->id();
                MaterialHash::const_iterator iMaterial= m_MaterialHash.find(materialID);
                // Check if there is a material at specified index
                Q_ASSERT(iMaterial == m_MaterialHash.end());

                // Add this geometry in the material use table
                pMaterial->addGLC_Geom(this);
                // Add the Material to Material hash table
                m_MaterialHash.insert(materialID, pMaterial);

                // Test if the material is transparent
                if (pMaterial->isTransparent())
                {
                        //qDebug() << "Add transparent material";
                        ++m_TransparentMaterialNumber;
                }
        }
}

void GLC_Geometry::setWireColor(const QColor& color)
{
        bool previousColorIsTransparent= (m_WireColor.alpha() != 255);
        bool newColorIsTransparent= (color.alpha() != 255);

        if (previousColorIsTransparent != newColorIsTransparent)
        {
                if (newColorIsTransparent) ++m_TransparentMaterialNumber;
                else if (previousColorIsTransparent) --m_TransparentMaterialNumber;
        }

        m_WireColor= color;
}
// OpenGL Functions

// if the geometry have a texture, load it
void GLC_Geometry::glLoadTexture(void)
{
        MaterialHash::iterator iMaterial= m_MaterialHash.begin();

    while (iMaterial != m_MaterialHash.constEnd())
    {
        // Load texture of mesh materials
        iMaterial.value()->glLoadTexture();
        ++iMaterial;
    }
}

// Geometry display
void GLC_Geometry::render(const GLC_RenderProperties& renderProperties)
{
        Q_ASSERT(!m_IsWire || (m_IsWire && m_MaterialHash.isEmpty()));
        bool renderWire= (renderProperties.renderingFlag() == glc::TransparentRenderFlag) && isTransparent();
        renderWire= renderWire || ((renderProperties.renderingFlag() != glc::TransparentRenderFlag) && !isTransparent());
        if (!m_IsWire || renderWire)
        {
                if (m_MaterialHash.isEmpty() && !m_IsWire)
                {
                        GLC_Material* pMaterial= new GLC_Material();
                        pMaterial->setName(name());
                        addMaterial(pMaterial);
                }

                m_IsSelected= renderProperties.isSelected();

                // Define Geometry's property
                if(!GLC_State::isInSelectionMode())
                {
                        glPropGeom(renderProperties);
                }

                glDraw(renderProperties);

                m_IsSelected= false;
                m_GeometryIsValid= true;

                // OpenGL error handler
                GLenum error= glGetError();
                if (error != GL_NO_ERROR)
                {
                        GLC_OpenGlException OpenGlException("GLC_Geometry::glExecute " + name(), error);
                        throw(OpenGlException);
                }
        }
}

// Virtual interface for OpenGL Geometry properties.
void GLC_Geometry::glPropGeom(const GLC_RenderProperties& renderProperties)
{
        glLineWidth(lineWidth());

        if(m_IsWire)
        {
                glLineWidth(m_LineWidth);
                glDisable(GL_LIGHTING);
                if (!renderProperties.isSelected())
                {
                        // 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);
                }
                else
                {
                        GLC_SelectionMaterial::glExecute();
                }
        }
        else if (m_MaterialHash.size() == 1)
        {
                GLC_Material* pCurrentMaterial= m_MaterialHash.begin().value();
                if (pCurrentMaterial->hasTexture())
                {
                        glEnable(GL_LIGHTING);
                        pCurrentMaterial->glExecute();
                        if (renderProperties.isSelected()) GLC_SelectionMaterial::glExecute();
                }
                else
                {
                        glEnable(GL_LIGHTING);
                        if (renderProperties.isSelected()) GLC_SelectionMaterial::glExecute();
                        else pCurrentMaterial->glExecute();
                }
        }
}

// Remove the specified material from the geometry
void GLC_Geometry::removeMaterial(GLC_uint id)
{
        Q_ASSERT(containsMaterial(id));
        // Remove the first material
        GLC_Material* pMaterial= m_MaterialHash.value(id);
    // delete the material if necessary
        pMaterial->delGLC_Geom(this->id());
        if (pMaterial->isTransparent())
        {
                --m_TransparentMaterialNumber;
        }
    if (pMaterial->isUnused()) delete pMaterial;
        m_MaterialHash.remove(id);

}

// Clear the content of this object and makes it empty
void  GLC_Geometry::clearGeometry()
{
        m_GeometryIsValid= false;

        delete m_pBoundingBox;
        m_pBoundingBox= NULL;

        // delete mesh inner material
        {
                MaterialHash::const_iterator i= m_MaterialHash.begin();
            while (i != m_MaterialHash.constEnd())
            {
                // delete the material if necessary
                i.value()->delGLC_Geom(id());
                if (i.value()->isUnused()) delete i.value();
                ++i;
            }
        }
        m_MaterialHash.clear();

        m_UseColorPerVertex= false;
        m_IsSelected= false;
        m_WireData.clear();
        m_IsWire= false;
        m_TransparentMaterialNumber= 0;
        m_Name.clear();

}