init A4

A3/display.frag

@@ -71,7 +71,7 @@ void main(void)
         float maxfloat = 0;
         vec3 normalMax = vec3(0);
 
-        while (dst.a < 1 && rayLength > 0) {
+        while ((dst.a < 1 || MIP) && rayLength > 0) {
 
             float density = texture3D(volumeData, pos).x;
             maxfloat = max(density,maxfloat);
@@ -80,11 +80,11 @@ void main(void)
             vec3 normal = volumeNormal(pos);
 
             src.xyz = phong(src.xyz,normal);
-            src.rgb *= src.a;
+           // src.rgb *= src.a;
 
            // dst = dst * (1.0f - src.a) + src;// * src.a;
            // dst = (1.0 - dst.a) * src + dst ;
-            dst =  src + dst*src.a ;
+            dst =  dst + src*src.a ;
 
             if(density>maxfloat){
                 maxfloat = density;
@@ -96,7 +96,10 @@ void main(void)
         }
 
         if(MIP) {
-            gl_FragColor = vec4(phong(transfer(maxfloat).xyz,normalMax),1) ;
+            //gl_FragColor = vec4(maxfloat) ;
+            gl_FragColor = vec4(transfer(maxfloat));
+           // gl_FragColor = vec4(normalMax,1);
+           // gl_FragColor = vec4(phong(transfer(maxfloat).xyz,normalMax),1) ;
         }else{
             gl_FragColor = dst;
         }

A3/glview.cpp

 #include "glview.h"
 #include <QMatrix4x4>
+#include <QDebug>
 
 
 
@@ -101,6 +102,7 @@ void GLView::home(){
 
 void GLView::setMIP(bool mip){
     this->MIP = mip;
+    updateGL();
 }
 
 

A3/hellocube.pro

@@ -51,5 +51,4 @@ DISTFILES += \
     display.frag \
     display.vert
 
-FORMS += \
-    transferui.ui
+FORMS +=

A3/hellocube.pro.user

 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE QtCreatorProject>
-<!-- Written by QtCreator 3.5.1, 2015-12-05T11:07:00. -->
+<!-- Written by QtCreator 3.5.1, 2015-12-08T14:43:54. -->
 <qtcreator>
  <data>
   <variable>EnvironmentId</variable>

A3/mainwindow.cpp

@@ -96,6 +96,7 @@ void MainWindow::initToolbar()
     toolBar->addWidget(showGridButton);
     toolBar->addWidget(gridSizeInput);
     toolBar->addWidget(gridStepInput);
+    toolBar->addWidget(MIPButton);
 
     toolBar->addSeparator();
 
@@ -244,6 +245,15 @@ MainWindow::MainWindow(QWidget *parent)
     connect(exitAction, SIGNAL(triggered()), this, SLOT(close()));
 
 
+    MIPButton = new QToolButton(toolBar);
+    MIPButton->setCheckable(true);
+    connect(MIPButton, SIGNAL(clicked(bool)), perspectiveView, SLOT(setMIP(bool)));
+    connect(MIPButton, SIGNAL(clicked(bool)), frontView, SLOT(setMIP(bool)));
+    connect(MIPButton, SIGNAL(clicked(bool)), leftView, SLOT(setMIP(bool)));
+    connect(MIPButton, SIGNAL(clicked(bool)), topView, SLOT(setMIP(bool)));
+
+
+
     //Interaction Actions
     interactionGroup = new QActionGroup(this);
     interactionMenu = new QMenu("Interaction",this);
@@ -328,9 +338,6 @@ void MainWindow::initDoc()
 
     dock->setWidget(sceneView);
 
-
-
-
     //Transfer Function Doc
     QDockWidget *transferDock = new QDockWidget("Transfer Function Editor",this);
     transferDock->setAllowedAreas(Qt::LeftDockWidgetArea | Qt::RightDockWidgetArea);
@@ -341,6 +348,7 @@ void MainWindow::initDoc()
     connect(transEditor,SIGNAL(dataChanged(uchar*)),frontView,SLOT(loadTransfer(uchar*)));
     connect(transEditor,SIGNAL(dataChanged(uchar*)),leftView,SLOT(loadTransfer(uchar*)));
     connect(transEditor,SIGNAL(dataChanged(uchar*)),topView,SLOT(loadTransfer(uchar*)));
+    connect(transEditor,SIGNAL(dataChanged(uchar*)),this,SLOT(updateGL()));
 
 
 

A3/mainwindow.h

@@ -79,6 +79,8 @@ private:
     QSpinBox* gridStepInput;
     QToolButton* showGridButton;
 
+     QToolButton* MIPButton;
+
     QTimer *timer;
 
 

A4/camera.cpp

+#include "camera.h"
+
+Camera::Camera(bool persp)
+{
+    this->persp = persp;
+    setHome(new QQuaternion(), new QVector3D(0.0,0.0,-4.0));
+}
+
+void Camera::home()
+{
+    this->rotation = homeRotation;
+    this->translation = homeTranslation;
+
+}
+
+void Camera::setHome(QQuaternion *rotation, QVector3D *translation)
+{
+    //qDebug()<<"Cam Home"<<*rotation<<" trans:"<<*translation;
+
+    this->homeRotation = rotation;
+    this->homeTranslation = translation;
+    home();
+}
+
+void Camera::rotate(QQuaternion newPos )
+{
+    if(persp){
+        QQuaternion newRot = newPos * *rotation;
+        rotation = new QQuaternion(newRot.toVector4D());
+    }
+}
+
+void Camera::move(QVector3D newPos)
+{
+
+    QVector3D newTrans = newPos + *translation;
+    translation = new QVector3D(newTrans);
+}
+
+
+void Camera::setupCamera(GLdouble aspect )
+{
+    glMatrixMode(GL_PROJECTION);
+    glLoadIdentity();
+    if(persp){
+        perspective(45.0,aspect,0.01,100.0);
+    } else {
+        int size = 2;
+        glOrtho(-size*aspect,size*aspect,-size,size,0.01,100.0);
+    }
+
+    glMatrixMode(GL_MODELVIEW);
+    glLoadIdentity();
+
+    //Camera Tranforations
+    QMatrix4x4 mat = QMatrix4x4();
+    mat.translate(*translation);
+    glMultMatrixf(mat.data());
+
+    mat = QMatrix4x4();
+    mat.rotate(*rotation);
+    glMultMatrixf(mat.data());
+}
+
+
+void Camera::perspective(GLdouble fovy, GLdouble aspect, GLdouble zNear, GLdouble zFar)
+{
+    GLdouble xmin, xmax, ymin, ymax;
+
+    ymax = zNear * tan( fovy * M_PI / 360.0 );
+    ymin = -ymax;
+    xmin = ymin * aspect;
+    xmax = ymax * aspect;
+
+    glFrustum( xmin, xmax, ymin, ymax, zNear, zFar );
+}

A4/camera.h

+#ifndef CAMERA_H
+#define CAMERA_H
+
+
+#include <QtGui>
+#include <QtOpenGL>
+
+#include <QQuaternion>
+#include <QVector3D>
+
+class Camera: public QObject
+{
+     Q_OBJECT
+private:
+    bool persp;
+//    QQuaternion *rotation;
+//    QVector3D *translation;
+
+    QQuaternion *homeRotation;
+    QVector3D *homeTranslation;
+
+    void perspective(GLdouble fovy, GLdouble aspect, GLdouble zNear, GLdouble zFar);
+
+public slots:
+    void home();
+
+public:
+    QQuaternion *rotation;
+    QVector3D *translation;
+
+    Camera(bool persp);
+    void setHome(QQuaternion *rotation, QVector3D *translation);
+    void rotate(QQuaternion newPos );
+    void move(QVector3D newPos );
+
+    void setupCamera(GLdouble aspect);
+};
+
+#endif // CAMERA_H

A4/controler.cpp

+#include "controler.h"
+#include "camera.h"
+#include "glview.h"
+#include "scene.h"
+#include "mainwindow.h"
+#include <iostream>
+
+Controler::Controler(MainWindow *mainwindow,Scene *scene)
+{
+    this->mainwindow = mainwindow;
+    this->scene = scene;
+    viewMode = CAMERA;
+
+}
+
+void Controler::mousePressed(GLView* view, QMouseEvent *event)
+{
+    activeView = view;
+    mainwindow->setActiveView(view);
+
+    lastSpeherePos = trackballPoint(event->pos().x(),event->pos().y());
+    lastScreenPos = new QPointF(event->screenPos());
+    event->accept();
+}
+
+
+void Controler::mouseMoveEvent(GLView* view, QMouseEvent *event)
+{
+    if(activeView != view)
+        qDebug()<<"Active view Change";
+
+    if (event->buttons() & Qt::LeftButton) {
+        rotate(trackballPoint(event->pos().x(),event->pos().y()));
+        event->accept();
+    } else  if (event->buttons() & Qt::RightButton) {
+        move(new QPointF(event->screenPos()));
+        event->accept();
+    }
+}
+
+void Controler::wheelEvent(GLView* view, QWheelEvent *event ) {
+    activeView = view;
+    mainwindow->setActiveView(view);
+
+    bool ctrlPressed = QApplication::keyboardModifiers() & Qt::ControlModifier;
+
+    QVector3D vec;
+    if(event->delta()<0)
+        vec = QVector3D(0.0,0.0,1.0);
+    else
+        vec = QVector3D(0.0,0.0,-1.0);
+
+    if((viewMode == CAMERA) ^ ctrlPressed){
+        activeView->getCamera()->move(vec);
+    } else if((viewMode == EDIT) ^ ctrlPressed){
+        vec = activeView->getCamera()->rotation->conjugate().rotatedVector(vec);
+        scene->moveActive(vec);
+    } else{
+        qDebug()<<"möp"<<viewMode<<" "<<CAMERA<<" "<<EDIT;
+    }
+
+    mainwindow->updateGL();
+}
+
+
+QVector3D* Controler::trackballPoint(int x, int y){
+    float xo,yo,zo;
+
+    // qDebug()<<"x:"<< x << " y:"<<y;
+    xo = ((2.0*x)-activeView->width())/ activeView->height();
+    yo = (activeView->height()-(2.0*y))/activeView->width();
+
+    float d = sqrt(xo*xo+yo*yo);
+    zo = qMax(qCos(M_PI_2*d),qreal(0.0)); //qMin(d,1.0f)
+
+    QVector3D *pos = new QVector3D(xo,yo,zo);
+    pos->normalize();
+    //  qDebug()<<"x:"<< xo << " y:"<<yo<<" z:"<<zo;
+    return pos;
+}
+
+void Controler::rotate(QVector3D *newPos )
+{
+    QVector3D axis = QVector3D::crossProduct(*lastSpeherePos,*newPos);
+
+    float angle = 180 / M_PI * asin(sqrt(QVector3D::dotProduct(axis, axis)));
+    axis.normalize();
+
+    //axis = rotation->conjugate().rotatedVector(axis);
+    bool ctrlPressed = QApplication::keyboardModifiers() & Qt::ControlModifier;
+    if((viewMode == CAMERA) ^ ctrlPressed){
+        activeView->getCamera()->rotate(QQuaternion::fromAxisAndAngle(axis, angle));
+    } else if((viewMode == EDIT) ^ ctrlPressed){
+        scene->rotateActive(QQuaternion::fromAxisAndAngle(axis, angle));
+    } else{
+        qDebug()<<"möp"<<viewMode<<" "<<CAMERA<<" "<<EDIT;
+    }
+
+    lastSpeherePos = newPos;
+    mainwindow->updateGL();
+
+}
+
+void Controler::move(QPointF * newPos){
+    QPointF dt = *newPos;
+    dt -= *lastScreenPos;
+    dt *= 0.01f;
+
+    float dx = dt.x();
+    float dy = dt.y()*-1.0;
+
+    bool ctrlPressed = QApplication::keyboardModifiers() & Qt::ControlModifier;
+    if((viewMode == CAMERA) ^ ctrlPressed){
+        activeView->getCamera()->move(QVector3D(dx,dy,0.0));
+    } else if((viewMode == EDIT) ^ ctrlPressed){
+        QVector3D vec = activeView->getCamera()->rotation->conjugate().rotatedVector(QVector3D(dx,dy,0.0));
+        scene->moveActive(vec);
+    } else{
+        qDebug()<<"möp"<<viewMode<<" "<<CAMERA<<" "<<EDIT;
+    }
+
+    lastScreenPos = newPos;
+    mainwindow->updateGL();
+}
+
+void Controler::setCamMode(){
+    viewMode = CAMERA;
+}
+
+void Controler::setEditMode(){
+    viewMode = EDIT;
+}
+
+void Controler::addVolume()
+{
+    QString fn = QFileDialog::getOpenFileName(NULL, tr("Open Volume..."),
+                                              QString("D:\\Projekte\\GraPa\\A3"), tr("Volume Files (*.raw )"));
+
+    if(fn.isEmpty())
+        return;
+    qDebug()<<"Opening File:"<<fn;
+    addVolume(fn);
+}
+
+void Controler::addVolume(QString filePath){
+
+
+    QFile file(filePath);
+
+    if(!file.open(QIODevice::ReadOnly)) {
+        QMessageBox::information(0, "error", file.errorString());
+    }
+
+    QByteArray line1 = file.readLine();
+    QTextStream l1(line1);
+    QStringList line1Text = l1.readLine().split(" ");
+    int x = line1Text[0].toInt();
+    int y = line1Text[1].toInt();
+    int z = line1Text[2].toInt();
+    qDebug()<<line1Text<< x << y << z;
+
+
+    QByteArray line2 = file.readLine();
+    QTextStream l2(line2);
+    QStringList line1Text2 = l2.readLine().split(" ");
+    double dx = line1Text2[0].toDouble();
+    double dy = line1Text2[1].toDouble();
+    double dz = line1Text2[2].toDouble();
+    qDebug()<<line1Text2<< dx <<dy << dz;
+
+
+    QByteArray rawdata = file.readAll();
+    //qDebug()<<rawdata;
+
+    char ***data = new char**[z];
+
+    int* histogram = new int[256];
+
+    for(int i = 0; i < 256; i++)
+    {
+        histogram[i] = 0;
+    }
+
+    int count = 0;
+    //  std::cout<<std::hex;
+    int printLine = 400;// z/2;
+
+    for(int k = 0; k < z; k++)
+    {
+        data[k] = new char*[y];
+        for(int j = 0; j < y; j++)
+        {
+
+            data[k][j] = new char[x];
+            for(int i = 0; i < x; i++)
+            {
+                uchar value = rawdata.at(count++);
+                data[k][j][i] = value;
+                histogram[value]++;
+
+                if(k == printLine ){
+                    int temp = value*9/256;
+                    std::cout<<temp;
+                }
+            }
+            if(k == printLine){
+                std::cout<<std::endl;
+            }
+        }
+    }
+
+    char *copydata = new char[rawdata.length()];
+
+    for(int i = 0; i < rawdata.length(); i++){
+        copydata[i] = rawdata.at(i);
+    }
+
+    //qDebug()<<file.readData(data,file.size()-file.pos());
+    int type = GL_UNSIGNED_BYTE;
+    if(rawdata.size()>x*y*z)
+        type = GL_UNSIGNED_SHORT;
+
+    for(int i = 0; i < 4; i++)
+        mainwindow->getViews()[i]->loadData(x,y,z,copydata,type);
+
+    SceneVolume *volume = new SceneVolume(x,y,z,dx,dy,dz);
+
+    scene->addSceneObjectTaActive(volume);
+
+    file.close();
+
+    uchar *trans = new uchar[4*256];
+
+    for(int i = 0; i < 256; i+=1){
+        int index = i*4;
+        trans[index] = i;
+        trans[index+1] = i;
+        trans[index+2] = i;
+        trans[index+3] = i;
+    }
+
+   for(int i = 0; i < 4; i++){
+     //  mainwindow->getViews()[i]->loadTransfer(trans);
+   }
+
+   this->mainwindow->transEditor->setHistogram(histogram);
+   // this->mainwindow->transEditor->setTransferFunction(trans);
+
+
+
+    qDebug()<<"File Read finish";
+
+
+}

A4/controler.h

+#ifndef CONTROLER_H
+#define CONTROLER_H
+
+#include <QObject>
+#include <QtGui>
+
+class camera;
+class GLView;
+class Scene;
+class MainWindow;
+
+enum Mode{CAMERA, EDIT};
+
+class Controler: public QObject
+{
+     Q_OBJECT
+public:
+    Controler(MainWindow *mainwindow,Scene *scene);
+
+    void mousePressed(GLView* view, QMouseEvent *event);
+    void mouseMoveEvent(GLView* view, QMouseEvent *event);
+    void wheelEvent(GLView* view, QWheelEvent *event );
+
+public slots:
+    void setCamMode();
+    void setEditMode();
+
+    void addVolume();
+    void addVolume(QString filePath);
+
+private:
+    MainWindow *mainwindow;
+    Scene *scene;
+    GLView *activeView;
+
+    QVector3D *lastSpeherePos;
+    QPointF * lastScreenPos;
+
+    Mode viewMode;
+
+
+
+    QVector3D* trackballPoint(int x, int y);
+    void rotate(QVector3D *newPos );
+    void move(QPointF * newPos);
+};
+
+#endif // CONTROLER_H

A4/cubewidget.cpp

+#include "cubewidget.h"
+
+CubeWidget::CubeWidget(QWidget *parent)
+    : QGLWidget(QGLFormat(QGL::SampleBuffers), parent)
+{
+
+}
+
+QSize CubeWidget::minimumSizeHint() const
+{
+    return QSize(50, 50);
+}
+
+QSize CubeWidget::sizeHint() const
+{
+    return QSize(600, 400);
+}
+
+void CubeWidget::initializeGL ()
+{
+    glClearColor(0.0, 0.0, 0.0, 0.0);
+    glEnable(GL_DEPTH_TEST);
+
+    tesselation = 0;
+    prepareShader();
+    // enable default shading
+    home();
+    showFlat();
+
+    glEnable(GL_LIGHTING);
+    glEnable(GL_LIGHT0);
+    static GLfloat lightPosition[4] = { 0.5, 0.0, 2.0, 1.0 };
+    glLightfv(GL_LIGHT0, GL_POSITION, lightPosition);
+    //GLfloat white[] = {1.0,1.0,1.0};
+    //glLightfv(GL_LIGHT0, GL_DIFFUSE, white);
+    //glLightfv(GL_LIGHT0, GL_SPECULAR, white);
+    //glLightf(GL_LIGHT0, GL_LINEAR_ATTENUATION, 2.0f);
+
+}
+
+void CubeWidget::prepareShader()
+{
+    QGLShader *vertex = new QGLShader(QGLShader::Vertex);
+    if(!vertex->compileSourceFile(QLatin1String(":/phong.vert")))
+        qCritical()<< "Vertex Shader failed"<< vertex->log();
+
+    QGLShader *fragment = new QGLShader(QGLShader::Fragment);
+    if(!fragment->compileSourceFile(QLatin1String(":/phong.frag")))
+        qCritical()<< "Fragment Shader failed"<< fragment->log();
+
+    shader = new QGLShaderProgram(this);
+    shader->addShader(vertex);
+    shader->addShader(fragment);
+    if(!shader->link())
+        qCritical()<< "Linking  failed"<<shader->log();
+}
+
+void CubeWidget::setMaterial(GLfloat *color )
+{
+    glMaterialfv(GL_FRONT,GL_AMBIENT,color);
+    GLfloat white[] = {1.0,1.0,1.0};
+    glMaterialfv(GL_FRONT,GL_DIFFUSE,color);
+    glMaterialfv(GL_FRONT,GL_SPECULAR,white);
+
+    GLfloat mShininess[] = {128};
+    glMaterialfv(GL_FRONT,GL_SHININESS,mShininess);
+
+}
+
+void CubeWidget::paintGL ( )
+{
+    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+    glLoadIdentity();
+
+    glMultMatrixf(translation->data());
+
+    QMatrix4x4 mat = QMatrix4x4();
+    mat.rotate(*rotation);
+    glMultMatrixf(mat.data());
+
+    GLfloat red[] = {1.0,0.0,0.0};
+    GLfloat green[] = {0.0,1.0,0.0};
+    GLfloat blue[] = {0.0,0.0,1.0};
+    GLfloat cyan[] = {0.0,1.0,1.0};
+    GLfloat magenta[] = {1.0,0.0,1.0};
+    GLfloat yellow[] = {1.0,1.0,0.0};
+    float increment = 1.0/(pow(2,tesselation));
+
+    setMaterial(red);
+    glBegin(GL_QUADS);
+    glNormal3f(0,1,0);
+    for (float x = -0.5; x < 0.5 ; x+= increment) {
+        for (float y = -0.5; y < 0.5 ; y+= increment ) {
+            glVertex3f( x+increment, 0.5f,y);
+            glVertex3f(x, 0.5f,y);
+            glVertex3f(x, 0.5f, y+increment);
+            glVertex3f( x+increment, 0.5f, y+increment);
+        }
+    }
+    glEnd();
+
+
+    setMaterial(magenta);
+    glBegin(GL_QUADS);
+    glNormal3f(0,-1,0);
+    for (float x = -0.5; x < 0.5 ; x+= increment) {
+        for (float y = -0.5; y < 0.5 ; y+= increment ) {
+            glVertex3f( x+increment, -0.5f,y+increment);
+            glVertex3f(x, -0.5f,y+increment);
+            glVertex3f(x, -0.5f, y);
+            glVertex3f( x+increment, -0.5f, y);
+        }
+    }
+    glEnd();
+
+
+    setMaterial(green);
+    glBegin(GL_QUADS);
+    glNormal3f(0,0,1);
+    for (float x = -0.5; x < 0.5 ; x+= increment) {
+        for (float y = -0.5; y < 0.5 ; y+= increment ) {
+            glVertex3f( x+increment,y+increment, 0.5f);
+            glVertex3f(x, y+increment, 0.5f);
+            glVertex3f(x,  y, 0.5f);
+            glVertex3f( x+increment, y, 0.5f);
+        }
+    }
+    glEnd();
+
+
+    setMaterial(yellow);
+    glBegin(GL_QUADS);
+    glNormal3f(0,0,-1);
+    for (float x = -0.5; x < 0.5 ; x+= increment) {
+        for (float y = -0.5; y < 0.5 ; y+= increment ) {
+            glVertex3f( x+increment,y, -0.5f);
+            glVertex3f(x, y,-0.5f);
+            glVertex3f(x, y+increment,-0.5f);
+            glVertex3f( x+increment,y+increment, -0.5f);
+        }
+    }
+    glEnd();
+
+
+    setMaterial(blue);
+    glBegin(GL_QUADS);
+    glNormal3f(-1,0,0);
+    for (float x = -0.5; x < 0.5 ; x+= increment) {
+        for (float y = -0.5; y < 0.5 ; y+= increment ) {
+            glVertex3f( -0.5f, x+increment,y+increment);
+            glVertex3f( -0.5f,x+increment,y);
+            glVertex3f( -0.5f,x, y);
+            glVertex3f(  -0.5f,x, y+increment);
+        }
+    }
+    glEnd();
+
+
+    setMaterial(cyan);
+    glBegin(GL_QUADS);
+    glNormal3f(1,0,0);
+    for (float x = -0.5; x < 0.5 ; x+= increment) {
+        for (float y = -0.5; y < 0.5 ; y+= increment ) {
+            glVertex3f( 0.5f, x+increment,y);
+            glVertex3f( 0.5f,x+increment,y+increment);
+            glVertex3f( 0.5f,x, y+increment);
+            glVertex3f(  0.5f,x, y);
+        }
+    }
+    glEnd();
+}
+
+
+
+void CubeWidget::resizeGL(int width , int height )
+{
+    glMatrixMode(GL_PROJECTION);
+
+    glViewport(0, 0, width, height);
+
+    glLoadIdentity();
+    perspective(45.0,1.0*width/height,0.01,100.0);
+
+    glMatrixMode(GL_MODELVIEW);
+}
+
+void CubeWidget::perspective(GLdouble fovy, GLdouble aspect, GLdouble zNear, GLdouble zFar)
+{
+    GLdouble xmin, xmax, ymin, ymax;
+
+    ymax = zNear * tan( fovy * M_PI / 360.0 );
+    ymin = -ymax;
+    xmin = ymin * aspect;
+    xmax = ymax * aspect;
+
+    glFrustum( xmin, xmax, ymin, ymax, zNear, zFar );
+}
+
+
+void CubeWidget::showWireframe()
+{
+
+    qDebug("show Wireframe");
+    glShadeModel(GL_FLAT);
+
+    glPolygonMode(GL_FRONT_AND_BACK,GL_LINE);
+    shader->release();
+    updateGL();
+}
+
+void CubeWidget::showFlat()
+{
+    qDebug("show Flat");
+    glShadeModel(GL_FLAT);
+    glPolygonMode(GL_FRONT_AND_BACK,GL_FILL);
+    shader->release();
+    updateGL();
+}
+
+void CubeWidget::showGouraut()
+{
+    qDebug("show Gouraut");
+    glShadeModel(GL_SMOOTH);
+    glPolygonMode(GL_FRONT_AND_BACK,GL_FILL);
+    shader->release();
+    updateGL();
+}
+
+void CubeWidget::showPhong()
+{
+    qDebug("show Phong");
+    glPolygonMode(GL_FRONT_AND_BACK,GL_FILL);
+    shader->bind();
+    updateGL();
+
+}
+
+void CubeWidget::setTessellation(int t)
+{
+    tesselation = t;
+    updateGL();
+    qDebug()<<"Tesselation" << t;
+}
+
+void CubeWidget::home()
+{
+    translation = new QMatrix4x4();
+    translation->translate(0.0,0.0,-3.0);
+    rotation = new QQuaternion();
+    updateGL();
+}
+
+void CubeWidget::mousePressEvent(QMouseEvent *event )
+{
+    lastSpeherePos = trackballPoint(event->pos().x(),event->pos().y());
+    lastScreenPos = new QPointF(event->screenPos());
+    event->accept();
+}
+
+void CubeWidget::mouseMoveEvent(QMouseEvent *event )
+{
+    if (event->buttons() & Qt::LeftButton) {
+        rotate(trackballPoint(event->pos().x(),event->pos().y()));
+        event->accept();
+    } else  if (event->buttons() & Qt::RightButton) {
+        move(new QPointF(event->screenPos()));
+        event->accept();
+    }
+}
+
+void CubeWidget::rotate(QVector3D *newPos )
+{
+    QVector3D axis = QVector3D::crossProduct(*lastSpeherePos,*newPos);
+
+    //warum so besser
+    float angle = 180 / M_PI * asin(sqrt(QVector3D::dotProduct(axis, axis)));
+    axis.normalize();
+
+    //axis = rotation->conjugate().rotatedVector(axis);
+    QQuaternion newRot = QQuaternion::fromAxisAndAngle(axis, angle) * *rotation;
+    rotation = new QQuaternion(newRot.toVector4D());
+
+    lastSpeherePos = newPos;
+    updateGL();
+
+}
+
+void CubeWidget::move(QPointF * newPos){
+    QPointF dt = *newPos;
+    dt -= *lastScreenPos;
+    dt *= 0.01f;
+
+    float dx = dt.x();
+    float dy = dt.y()*-1.0;
+
+    translation->translate(dx,dy,0.0);
+
+    lastScreenPos = newPos;
+    updateGL();
+}
+
+QVector3D* CubeWidget::trackballPoint(int x, int y){
+    float xo,yo,zo;
+
+    // qDebug()<<"x:"<< x << " y:"<<y;
+    xo = ((2.0*x)-width())/ height();
+    yo = (height()-(2.0*y))/width();
+
+    float d = sqrt(xo*xo+yo*yo);
+    zo = qMax(qCos(M_PI_2*d),qreal(0.0)); //qMin(d,1.0f)
+
+
+    QVector3D *pos = new QVector3D(xo,yo,zo);
+    pos->normalize();
+    //  qDebug()<<"x:"<< xo << " y:"<<yo<<" z:"<<zo;
+    return pos;
+}
+
+void CubeWidget::wheelEvent(QWheelEvent *event )
+{
+    if(event->delta()<0)
+        //TODO
+        translation->translate(0.0,0.0,1.0);
+    else
+        translation->translate(0.0,0.0,-1.0);
+
+    updateGL();
+}

A4/cubewidget.h

+#ifndef CUBEWIDGET_H
+#define CUBEWIDGET_H
+
+#include <QtGui>
+#include <QtOpenGL>
+#include <QGLFunctions>
+#include <QOpenGLFunctions>
+#include <math.h>
+#include <QMatrix4x4>
+#include <QQuaternion>
+#include <QVector3D>
+#include <algorithm>
+
+
+
+class CubeWidget : public QGLWidget
+{
+    Q_OBJECT
+protected :
+    void initializeGL ( ) ;
+    void paintGL ( ) ;
+    void resizeGL(int width , int height ) ;
+    void mousePressEvent(QMouseEvent *event ) ;
+    void mouseMoveEvent(QMouseEvent *event ) ;
+    void wheelEvent(QWheelEvent *event ) ;
+
+public:
+    CubeWidget(QWidget *parent = 0);
+
+    QSize minimumSizeHint() const;
+    QSize sizeHint() const;
+
+public slots:
+    void showWireframe();
+    void showFlat();
+    void showGouraut();
+    void showPhong();
+    void home();
+
+    void setTessellation(int t );
+
+private:
+    int tesselation;
+    int zoom;
+
+    QVector3D *lastSpeherePos;
+    QPointF * lastScreenPos;
+
+    QQuaternion *rotation;
+    QMatrix4x4 * translation;
+
+    QGLShaderProgram *shader;
+
+    void prepareShader();
+
+    void perspective(GLdouble fovy, GLdouble aspect, GLdouble zNear, GLdouble zFar);
+    void setMaterial(GLfloat *color );
+    void rotate(QVector3D *newPos );
+    void move(QPointF *newPos );
+    QVector3D *trackballPoint(int x, int y);
+};
+
+#endif // CUBEWIDGET_H

A4/display.frag

+uniform sampler2D Texture;
+uniform sampler2D PickID;
+
+uniform sampler2D StartRay;
+uniform sampler2D StopRay;
+uniform sampler3D volumeData;
+uniform sampler1D transferData;
+
+uniform mat4x4 NormalMatrix;
+
+uniform bool MIP;
+
+varying vec3 position;
+
+float stepsize = 0.001;
+
+
+
+vec4 transfer(float scalar){
+    float pos = (scalar*255.0/256.0 + 1/256.0/2);
+    //return vec4(scalar);
+    //return vec4(pos);
+    return texture1D(transferData,pos);
+}
+
+vec3 phong(vec3 color, vec3 normal){
+    vec3 V = normalize(-position);
+    vec3 N = normalize(normal);
+    vec3 L = normalize(gl_LightSource[0].position.xyz-position);
+    vec3 R = normalize(reflect(-L,N));
+
+    vec4 diffuse = vec4(max(dot(L,N),0.0));
+    float specular = pow(max(dot(R,V),0.0),16);
+
+    return (color * diffuse+ color * specular);
+}
+
+vec3 volumeNormal(vec3 uvw){
+    float stepsize = 0.01;
+    vec4 res = vec4(
+                texture3D(volumeData,uvw- vec3(stepsize,0,0)).r
+                -texture3D(volumeData,uvw+ vec3(stepsize,0,0)).r,
+
+                texture3D(volumeData, uvw- vec3(0,stepsize,0)).r
+                -texture3D(volumeData, uvw+ vec3(0,stepsize,0)).r,
+
+                texture3D(volumeData, uvw- vec3(0,0,stepsize)).r
+                -texture3D(volumeData, uvw+ vec3(0,0,stepsize)).r
+                , 0);
+   res = NormalMatrix * res; //TODO Normal Matrix
+    return normalize(res.xyz);
+
+}
+
+void main(void)
+{
+    vec3 front = texture2D(StartRay,gl_TexCoord[0].st).xyz;
+    vec3 back = texture2D(StopRay,gl_TexCoord[0].st).xyz;
+
+    if(front == back){
+        gl_FragColor = vec4(texture2D(Texture,gl_TexCoord[0].st).xyz,1);
+    }else{
+        vec3 ray = back-front;
+       // vec3 ray = front-back;
+        float rayLength = length(ray);
+        vec3 stepVector = stepsize * ray/rayLength;
+
+        vec3 pos = front;
+        vec4 dst = vec4(0);
+
+        float maxfloat = 0;
+        vec3 normalMax = vec3(0);
+
+        while ((dst.a < 1 || MIP) && rayLength > 0) {
+
+            float density = texture3D(volumeData, pos).x;
+            maxfloat = max(density,maxfloat);
+
+            vec4 src = transfer(density);
+            vec3 normal = volumeNormal(pos);
+
+            src.xyz = phong(src.xyz,normal);
+           // src.rgb *= src.a;
+
+           // dst = dst * (1.0f - src.a) + src;// * src.a;
+           // dst = (1.0 - dst.a) * src + dst ;
+            dst =  dst + src*src.a ;
+
+            if(density>maxfloat){
+                maxfloat = density;
+                normalMax = normal;
+            }
+
+            pos += stepVector;
+            rayLength -= stepsize;
+        }
+
+        if(MIP) {
+            //gl_FragColor = vec4(maxfloat) ;
+            gl_FragColor = vec4(transfer(maxfloat));
+           // gl_FragColor = vec4(normalMax,1);
+           // gl_FragColor = vec4(phong(transfer(maxfloat).xyz,normalMax),1) ;
+        }else{
+            gl_FragColor = dst;
+        }
+
+
+        //gl_FragColor = vec4(texture1D(transferData,front.x));
+
+        //gl_FragColor = vec4(gl_TexCoord[0].xyz,1);
+        //gl_FragColor = vec4(texture3D(volumeData,vec3(front.xy,0.5)).x);
+    }
+}
+
+

A4/display.vert

+attribute vec4 gl_Vertex;
+uniform mat4 gl_ModelViewProjectionMatrix;
+
+varying vec3 position;
+
+void main(void)
+{
+    gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;
+    position = vec3(gl_ModelViewMatrix * gl_Vertex);
+    gl_TexCoord[0] = gl_MultiTexCoord0;
+}
+

A4/glut.h

+#ifndef __glut_h__
+#define __glut_h__
+
+/* Copyright (c) Mark J. Kilgard, 1994, 1995, 1996, 1998. */
+
+/* This program is freely distributable without licensing fees  and is
+   provided without guarantee or warrantee expressed or  implied. This
+   program is -not- in the public domain. */
+
+#if defined(_WIN32)
+
+/* GLUT 3.7 now tries to avoid including <windows.h>
+   to avoid name space pollution, but Win32's <GL/gl.h> 
+   needs APIENTRY and WINGDIAPI defined properly. */
+# if 0
+   /* This would put tons of macros and crap in our clean name space. */
+#  define  WIN32_LEAN_AND_MEAN
+#  include <windows.h>
+# else
+   /* XXX This is from Win32's <windef.h> */
+#  ifndef APIENTRY
+#   define GLUT_APIENTRY_DEFINED
+#   if (_MSC_VER >= 800) || defined(_STDCALL_SUPPORTED) || defined(__BORLANDC__) || defined(__LCC__)
+#    define APIENTRY    __stdcall
+#   else
+#    define APIENTRY
+#   endif
+#  endif
+   /* XXX This is from Win32's <winnt.h> */
+#  ifndef CALLBACK
+#   if (defined(_M_MRX000) || defined(_M_IX86) || defined(_M_ALPHA) || defined(_M_PPC)) && !defined(MIDL_PASS) || defined(__LCC__)
+#    define CALLBACK __stdcall
+#   else
+#    define CALLBACK
+#   endif
+#  endif
+   /* XXX Hack for lcc compiler.  It doesn't support __declspec(dllimport), just __stdcall. */
+#  if defined( __LCC__ )
+#   undef WINGDIAPI
+#   define WINGDIAPI __stdcall
+#  else
+   /* XXX This is from Win32's <wingdi.h> and <winnt.h> */
+#   ifndef WINGDIAPI
+#    define GLUT_WINGDIAPI_DEFINED
+#    define WINGDIAPI __declspec(dllimport)
+#   endif
+#  endif
+   /* XXX This is from Win32's <ctype.h> */
+#  ifndef _WCHAR_T_DEFINED
+typedef unsigned short wchar_t;
+#   define _WCHAR_T_DEFINED
+#  endif
+# endif
+
+/* To disable automatic library usage for GLUT, define GLUT_NO_LIB_PRAGMA
+   in your compile preprocessor options. */
+# if !defined(GLUT_BUILDING_LIB) && !defined(GLUT_NO_LIB_PRAGMA)
+#  pragma comment (lib, "winmm.lib")      /* link with Windows MultiMedia lib */
+/* To enable automatic SGI OpenGL for Windows library usage for GLUT,
+   define GLUT_USE_SGI_OPENGL in your compile preprocessor options.  */
+#  ifdef GLUT_USE_SGI_OPENGL
+#   pragma comment (lib, "opengl.lib")    /* link with SGI OpenGL for Windows lib */
+#   pragma comment (lib, "glu.lib")       /* link with SGI OpenGL Utility lib */
+#   pragma comment (lib, "glut.lib")      /* link with Win32 GLUT for SGI OpenGL lib */
+#  else
+#   pragma comment (lib, "opengl32.lib")  /* link with Microsoft OpenGL lib */
+#   pragma comment (lib, "glu32.lib")     /* link with Microsoft OpenGL Utility lib */
+#   pragma comment (lib, "glut32.lib")    /* link with Win32 GLUT lib */
+#  endif
+# endif
+
+/* To disable supression of annoying warnings about floats being promoted
+   to doubles, define GLUT_NO_WARNING_DISABLE in your compile preprocessor
+   options. */
+# ifndef GLUT_NO_WARNING_DISABLE
+#  pragma warning (disable:4244)  /* Disable bogus VC++ 4.2 conversion warnings. */
+#  pragma warning (disable:4305)  /* VC++ 5.0 version of above warning. */
+# endif
+
+/* Win32 has an annoying issue where there are multiple C run-time
+   libraries (CRTs).  If the executable is linked with a different CRT
+   from the GLUT DLL, the GLUT DLL will not share the same CRT static
+   data seen by the executable.  In particular, atexit callbacks registered
+   in the executable will not be called if GLUT calls its (different)
+   exit routine).  GLUT is typically built with the
+   "/MD" option (the CRT with multithreading DLL support), but the Visual
+   C++ linker default is "/ML" (the single threaded CRT).
+
+   One workaround to this issue is requiring users to always link with
+   the same CRT as GLUT is compiled with.  That requires users supply a
+   non-standard option.  GLUT 3.7 has its own built-in workaround where
+   the executable's "exit" function pointer is covertly passed to GLUT.
+   GLUT then calls the executable's exit function pointer to ensure that
+   any "atexit" calls registered by the application are called if GLUT
+   needs to exit.
+
+   Note that the __glut*WithExit routines should NEVER be called directly.
+   To avoid the atexit workaround, #define GLUT_DISABLE_ATEXIT_HACK. */
+
+/* XXX This is from Win32's <process.h> */
+# if !defined(_MSC_VER) && !defined(__cdecl)
+   /* Define __cdecl for non-Microsoft compilers. */
+#  define __cdecl
+#  define GLUT_DEFINED___CDECL
+# endif
+# ifndef _CRTIMP
+#  ifdef _NTSDK
+    /* Definition compatible with NT SDK */
+#   define _CRTIMP
+#  else
+    /* Current definition */
+#   ifdef _DLL
+#    define _CRTIMP __declspec(dllimport)
+#   else
+#    define _CRTIMP
+#   endif
+#  endif
+#  define GLUT_DEFINED__CRTIMP
+# endif
+
+/* GLUT API entry point declarations for Win32. */
+# ifdef GLUT_BUILDING_LIB
+#  define GLUTAPI __declspec(dllexport)
+# else
+#  ifdef _DLL
+#   define GLUTAPI __declspec(dllimport)
+#  else
+#   define GLUTAPI extern
+#  endif
+# endif
+
+/* GLUT callback calling convention for Win32. */
+# define GLUTCALLBACK __cdecl
+
+#endif  /* _WIN32 */
+
+#include <GL/gl.h>
+#include <GL/glu.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if defined(_WIN32)
+# ifndef GLUT_BUILDING_LIB
+extern _CRTIMP void __cdecl exit(int);
+# endif
+#else
+/* non-Win32 case. */
+/* Define APIENTRY and CALLBACK to nothing if we aren't on Win32. */
+# define APIENTRY
+# define GLUT_APIENTRY_DEFINED
+# define CALLBACK
+/* Define GLUTAPI and GLUTCALLBACK as below if we aren't on Win32. */
+# define GLUTAPI extern
+# define GLUTCALLBACK
+/* Prototype exit for the non-Win32 case (see above). */
+extern void exit(int);
+#endif
+
+/**
+ GLUT API revision history:
+ 
+ GLUT_API_VERSION is updated to reflect incompatible GLUT
+ API changes (interface changes, semantic changes, deletions,
+ or additions).
+ 
+ GLUT_API_VERSION=1  First public release of GLUT.  11/29/94
+
+ GLUT_API_VERSION=2  Added support for OpenGL/GLX multisampling,
+ extension.  Supports new input devices like tablet, dial and button
+ box, and Spaceball.  Easy to query OpenGL extensions.
+
+ GLUT_API_VERSION=3  glutMenuStatus added.
+
+ GLUT_API_VERSION=4  glutInitDisplayString, glutWarpPointer,
+ glutBitmapLength, glutStrokeLength, glutWindowStatusFunc, dynamic
+ video resize subAPI, glutPostWindowRedisplay, glutKeyboardUpFunc,
+ glutSpecialUpFunc, glutIgnoreKeyRepeat, glutSetKeyRepeat,
+ glutJoystickFunc, glutForceJoystickFunc (NOT FINALIZED!).
+**/
+#ifndef GLUT_API_VERSION  /* allow this to be overriden */
+#define GLUT_API_VERSION		3
+#endif
+
+/**
+ GLUT implementation revision history:
+ 
+ GLUT_XLIB_IMPLEMENTATION is updated to reflect both GLUT
+ API revisions and implementation revisions (ie, bug fixes).
+
+ GLUT_XLIB_IMPLEMENTATION=1  mjk's first public release of
+ GLUT Xlib-based implementation.  11/29/94
+
+ GLUT_XLIB_IMPLEMENTATION=2  mjk's second public release of
+ GLUT Xlib-based implementation providing GLUT version 2 
+ interfaces.
+
+ GLUT_XLIB_IMPLEMENTATION=3  mjk's GLUT 2.2 images. 4/17/95
+
+ GLUT_XLIB_IMPLEMENTATION=4  mjk's GLUT 2.3 images. 6/?/95
+
+ GLUT_XLIB_IMPLEMENTATION=5  mjk's GLUT 3.0 images. 10/?/95
+
+ GLUT_XLIB_IMPLEMENTATION=7  mjk's GLUT 3.1+ with glutWarpPoitner.  7/24/96
+
+ GLUT_XLIB_IMPLEMENTATION=8  mjk's GLUT 3.1+ with glutWarpPoitner
+ and video resize.  1/3/97
+
+ GLUT_XLIB_IMPLEMENTATION=9 mjk's GLUT 3.4 release with early GLUT 4 routines.
+
+ GLUT_XLIB_IMPLEMENTATION=11 Mesa 2.5's GLUT 3.6 release.
+
+ GLUT_XLIB_IMPLEMENTATION=12 mjk's GLUT 3.6 release with early GLUT 4 routines + signal handling.
+
+ GLUT_XLIB_IMPLEMENTATION=13 mjk's GLUT 3.7 beta with GameGLUT support.
+
+ GLUT_XLIB_IMPLEMENTATION=14 mjk's GLUT 3.7 beta with f90gl friend interface.
+
+ GLUT_XLIB_IMPLEMENTATION=15 mjk's GLUT 3.7 beta sync'ed with Mesa <GL/glut.h>
+**/
+#ifndef GLUT_XLIB_IMPLEMENTATION  /* Allow this to be overriden. */
+#define GLUT_XLIB_IMPLEMENTATION	15
+#endif
+
+/* Display mode bit masks. */
+#define GLUT_RGB			0
+#define GLUT_RGBA			GLUT_RGB
+#define GLUT_INDEX			1
+#define GLUT_SINGLE			0
+#define GLUT_DOUBLE			2
+#define GLUT_ACCUM			4
+#define GLUT_ALPHA			8
+#define GLUT_DEPTH			16
+#define GLUT_STENCIL			32
+#if (GLUT_API_VERSION >= 2)
+#define GLUT_MULTISAMPLE		128
+#define GLUT_STEREO			256
+#endif
+#if (GLUT_API_VERSION >= 3)
+#define GLUT_LUMINANCE			512
+#endif
+
+/* Mouse buttons. */
+#define GLUT_LEFT_BUTTON		0
+#define GLUT_MIDDLE_BUTTON		1
+#define GLUT_RIGHT_BUTTON		2
+#define GLUT_WHEEL_UP			3
+#define GLUT_WHEEL_DOWN			4
+#define GLUT_XBUTTON1			5
+#define GLUT_XBUTTON2			6
+
+/* Mouse button  state. */
+#define GLUT_DOWN			0
+#define GLUT_UP				1
+
+#if (GLUT_API_VERSION >= 2)
+/* function keys */
+#define GLUT_KEY_F1			1
+#define GLUT_KEY_F2			2
+#define GLUT_KEY_F3			3
+#define GLUT_KEY_F4			4
+#define GLUT_KEY_F5			5
+#define GLUT_KEY_F6			6
+#define GLUT_KEY_F7			7
+#define GLUT_KEY_F8			8
+#define GLUT_KEY_F9			9
+#define GLUT_KEY_F10			10
+#define GLUT_KEY_F11			11
+#define GLUT_KEY_F12			12
+/* directional keys */
+#define GLUT_KEY_LEFT			100
+#define GLUT_KEY_UP			101
+#define GLUT_KEY_RIGHT			102
+#define GLUT_KEY_DOWN			103
+#define GLUT_KEY_PAGE_UP		104
+#define GLUT_KEY_PAGE_DOWN		105
+#define GLUT_KEY_HOME			106
+#define GLUT_KEY_END			107
+#define GLUT_KEY_INSERT			108
+#endif
+
+/* Entry/exit  state. */
+#define GLUT_LEFT			0
+#define GLUT_ENTERED			1
+
+/* Menu usage  state. */
+#define GLUT_MENU_NOT_IN_USE		0
+#define GLUT_MENU_IN_USE		1
+
+/* Visibility  state. */
+#define GLUT_NOT_VISIBLE		0
+#define GLUT_VISIBLE			1
+
+/* Window status  state. */
+#define GLUT_HIDDEN			0
+#define GLUT_FULLY_RETAINED		1
+#define GLUT_PARTIALLY_RETAINED		2
+#define GLUT_FULLY_COVERED		3
+
+/* Color index component selection values. */
+#define GLUT_RED			0
+#define GLUT_GREEN			1
+#define GLUT_BLUE			2
+
+#if defined(_WIN32)
+/* Stroke font constants (use these in GLUT program). */
+#define GLUT_STROKE_ROMAN		((void*)0)
+#define GLUT_STROKE_MONO_ROMAN		((void*)1)
+
+/* Bitmap font constants (use these in GLUT program). */
+#define GLUT_BITMAP_9_BY_15		((void*)2)
+#define GLUT_BITMAP_8_BY_13		((void*)3)
+#define GLUT_BITMAP_TIMES_ROMAN_10	((void*)4)
+#define GLUT_BITMAP_TIMES_ROMAN_24	((void*)5)
+#if (GLUT_API_VERSION >= 3)
+#define GLUT_BITMAP_HELVETICA_10	((void*)6)
+#define GLUT_BITMAP_HELVETICA_12	((void*)7)
+#define GLUT_BITMAP_HELVETICA_18	((void*)8)
+#endif
+#else
+/* Stroke font opaque addresses (use constants instead in source code). */
+GLUTAPI void *glutStrokeRoman;
+GLUTAPI void *glutStrokeMonoRoman;
+
+/* Stroke font constants (use these in GLUT program). */
+#define GLUT_STROKE_ROMAN		(&glutStrokeRoman)
+#define GLUT_STROKE_MONO_ROMAN		(&glutStrokeMonoRoman)
+
+/* Bitmap font opaque addresses (use constants instead in source code). */
+GLUTAPI void *glutBitmap9By15;
+GLUTAPI void *glutBitmap8By13;
+GLUTAPI void *glutBitmapTimesRoman10;
+GLUTAPI void *glutBitmapTimesRoman24;
+GLUTAPI void *glutBitmapHelvetica10;
+GLUTAPI void *glutBitmapHelvetica12;
+GLUTAPI void *glutBitmapHelvetica18;
+
+/* Bitmap font constants (use these in GLUT program). */
+#define GLUT_BITMAP_9_BY_15		(&glutBitmap9By15)
+#define GLUT_BITMAP_8_BY_13		(&glutBitmap8By13)
+#define GLUT_BITMAP_TIMES_ROMAN_10	(&glutBitmapTimesRoman10)
+#define GLUT_BITMAP_TIMES_ROMAN_24	(&glutBitmapTimesRoman24)
+#if (GLUT_API_VERSION >= 3)
+#define GLUT_BITMAP_HELVETICA_10	(&glutBitmapHelvetica10)
+#define GLUT_BITMAP_HELVETICA_12	(&glutBitmapHelvetica12)
+#define GLUT_BITMAP_HELVETICA_18	(&glutBitmapHelvetica18)
+#endif
+#endif
+
+/* glutGet parameters. */
+#define GLUT_WINDOW_X			((GLenum) 100)
+#define GLUT_WINDOW_Y			((GLenum) 101)
+#define GLUT_WINDOW_WIDTH		((GLenum) 102)
+#define GLUT_WINDOW_HEIGHT		((GLenum) 103)
+#define GLUT_WINDOW_BUFFER_SIZE		((GLenum) 104)
+#define GLUT_WINDOW_STENCIL_SIZE	((GLenum) 105)
+#define GLUT_WINDOW_DEPTH_SIZE		((GLenum) 106)
+#define GLUT_WINDOW_RED_SIZE		((GLenum) 107)
+#define GLUT_WINDOW_GREEN_SIZE		((GLenum) 108)
+#define GLUT_WINDOW_BLUE_SIZE		((GLenum) 109)
+#define GLUT_WINDOW_ALPHA_SIZE		((GLenum) 110)
+#define GLUT_WINDOW_ACCUM_RED_SIZE	((GLenum) 111)
+#define GLUT_WINDOW_ACCUM_GREEN_SIZE	((GLenum) 112)
+#define GLUT_WINDOW_ACCUM_BLUE_SIZE	((GLenum) 113)
+#define GLUT_WINDOW_ACCUM_ALPHA_SIZE	((GLenum) 114)
+#define GLUT_WINDOW_DOUBLEBUFFER	((GLenum) 115)
+#define GLUT_WINDOW_RGBA		((GLenum) 116)
+#define GLUT_WINDOW_PARENT		((GLenum) 117)
+#define GLUT_WINDOW_NUM_CHILDREN	((GLenum) 118)
+#define GLUT_WINDOW_COLORMAP_SIZE	((GLenum) 119)
+#if (GLUT_API_VERSION >= 2)
+#define GLUT_WINDOW_NUM_SAMPLES		((GLenum) 120)
+#define GLUT_WINDOW_STEREO		((GLenum) 121)
+#endif
+#if (GLUT_API_VERSION >= 3)
+#define GLUT_WINDOW_CURSOR		((GLenum) 122)
+#endif
+#define GLUT_SCREEN_WIDTH		((GLenum) 200)
+#define GLUT_SCREEN_HEIGHT		((GLenum) 201)
+#define GLUT_SCREEN_WIDTH_MM		((GLenum) 202)
+#define GLUT_SCREEN_HEIGHT_MM		((GLenum) 203)
+#define GLUT_MENU_NUM_ITEMS		((GLenum) 300)
+#define GLUT_DISPLAY_MODE_POSSIBLE	((GLenum) 400)
+#define GLUT_INIT_WINDOW_X		((GLenum) 500)
+#define GLUT_INIT_WINDOW_Y		((GLenum) 501)
+#define GLUT_INIT_WINDOW_WIDTH		((GLenum) 502)
+#define GLUT_INIT_WINDOW_HEIGHT		((GLenum) 503)
+#define GLUT_INIT_DISPLAY_MODE		((GLenum) 504)
+#if (GLUT_API_VERSION >= 2)
+#define GLUT_ELAPSED_TIME		((GLenum) 700)
+#endif
+#if (GLUT_API_VERSION >= 4 || GLUT_XLIB_IMPLEMENTATION >= 13)
+#define GLUT_WINDOW_FORMAT_ID		((GLenum) 123)
+#endif
+
+#if (GLUT_API_VERSION >= 2)
+/* glutDeviceGet parameters. */
+#define GLUT_HAS_KEYBOARD		((GLenum) 600)
+#define GLUT_HAS_MOUSE			((GLenum) 601)
+#define GLUT_HAS_SPACEBALL		((GLenum) 602)
+#define GLUT_HAS_DIAL_AND_BUTTON_BOX	((GLenum) 603)
+#define GLUT_HAS_TABLET			((GLenum) 604)
+#define GLUT_NUM_MOUSE_BUTTONS		((GLenum) 605)
+#define GLUT_NUM_SPACEBALL_BUTTONS	((GLenum) 606)
+#define GLUT_NUM_BUTTON_BOX_BUTTONS	((GLenum) 607)
+#define GLUT_NUM_DIALS			((GLenum) 608)
+#define GLUT_NUM_TABLET_BUTTONS		((GLenum) 609)
+#endif
+#if (GLUT_API_VERSION >= 4 || GLUT_XLIB_IMPLEMENTATION >= 13)
+#define GLUT_DEVICE_IGNORE_KEY_REPEAT   ((GLenum) 610)
+#define GLUT_DEVICE_KEY_REPEAT          ((GLenum) 611)
+#define GLUT_HAS_JOYSTICK		((GLenum) 612)
+#define GLUT_OWNS_JOYSTICK		((GLenum) 613)
+#define GLUT_JOYSTICK_BUTTONS		((GLenum) 614)
+#define GLUT_JOYSTICK_AXES		((GLenum) 615)
+#define GLUT_JOYSTICK_POLL_RATE		((GLenum) 616)
+#endif
+
+#if (GLUT_API_VERSION >= 3)
+/* glutLayerGet parameters. */
+#define GLUT_OVERLAY_POSSIBLE           ((GLenum) 800)
+#define GLUT_LAYER_IN_USE		((GLenum) 801)
+#define GLUT_HAS_OVERLAY		((GLenum) 802)
+#define GLUT_TRANSPARENT_INDEX		((GLenum) 803)
+#define GLUT_NORMAL_DAMAGED		((GLenum) 804)
+#define GLUT_OVERLAY_DAMAGED		((GLenum) 805)
+
+#if (GLUT_API_VERSION >= 4 || GLUT_XLIB_IMPLEMENTATION >= 9)
+/* glutVideoResizeGet parameters. */
+#define GLUT_VIDEO_RESIZE_POSSIBLE	((GLenum) 900)
+#define GLUT_VIDEO_RESIZE_IN_USE	((GLenum) 901)
+#define GLUT_VIDEO_RESIZE_X_DELTA	((GLenum) 902)
+#define GLUT_VIDEO_RESIZE_Y_DELTA	((GLenum) 903)
+#define GLUT_VIDEO_RESIZE_WIDTH_DELTA	((GLenum) 904)
+#define GLUT_VIDEO_RESIZE_HEIGHT_DELTA	((GLenum) 905)
+#define GLUT_VIDEO_RESIZE_X		((GLenum) 906)
+#define GLUT_VIDEO_RESIZE_Y		((GLenum) 907)
+#define GLUT_VIDEO_RESIZE_WIDTH		((GLenum) 908)
+#define GLUT_VIDEO_RESIZE_HEIGHT	((GLenum) 909)
+#endif
+
+/* glutUseLayer parameters. */
+#define GLUT_NORMAL			((GLenum) 0)
+#define GLUT_OVERLAY			((GLenum) 1)
+
+/* glutGetModifiers return mask. */
+#define GLUT_ACTIVE_SHIFT               1
+#define GLUT_ACTIVE_CTRL                2
+#define GLUT_ACTIVE_ALT                 4
+
+/* glutSetCursor parameters. */
+/* Basic arrows. */
+#define GLUT_CURSOR_RIGHT_ARROW		0
+#define GLUT_CURSOR_LEFT_ARROW		1
+/* Symbolic cursor shapes. */
+#define GLUT_CURSOR_INFO		2
+#define GLUT_CURSOR_DESTROY		3
+#define GLUT_CURSOR_HELP		4
+#define GLUT_CURSOR_CYCLE		5
+#define GLUT_CURSOR_SPRAY		6
+#define GLUT_CURSOR_WAIT		7
+#define GLUT_CURSOR_TEXT		8
+#define GLUT_CURSOR_CROSSHAIR		9
+/* Directional cursors. */
+#define GLUT_CURSOR_UP_DOWN		10
+#define GLUT_CURSOR_LEFT_RIGHT		11
+/* Sizing cursors. */
+#define GLUT_CURSOR_TOP_SIDE		12
+#define GLUT_CURSOR_BOTTOM_SIDE		13
+#define GLUT_CURSOR_LEFT_SIDE		14
+#define GLUT_CURSOR_RIGHT_SIDE		15
+#define GLUT_CURSOR_TOP_LEFT_CORNER	16
+#define GLUT_CURSOR_TOP_RIGHT_CORNER	17
+#define GLUT_CURSOR_BOTTOM_RIGHT_CORNER	18
+#define GLUT_CURSOR_BOTTOM_LEFT_CORNER	19
+/* Inherit from parent window. */
+#define GLUT_CURSOR_INHERIT		100
+/* Blank cursor. */
+#define GLUT_CURSOR_NONE		101
+/* Fullscreen crosshair (if available). */
+#define GLUT_CURSOR_FULL_CROSSHAIR	102
+#endif
+
+/* GLUT initialization sub-API. */
+GLUTAPI void APIENTRY glutInit(int *argcp, char **argv);
+#if defined(_WIN32) && !defined(GLUT_DISABLE_ATEXIT_HACK)
+GLUTAPI void APIENTRY __glutInitWithExit(int *argcp, char **argv, void (__cdecl *exitfunc)(int));
+#ifndef GLUT_BUILDING_LIB
+static void APIENTRY glutInit_ATEXIT_HACK(int *argcp, char **argv) { __glutInitWithExit(argcp, argv, exit); }
+#define glutInit glutInit_ATEXIT_HACK
+#endif
+#endif
+GLUTAPI void APIENTRY glutInitDisplayMode(unsigned int mode);
+#if (GLUT_API_VERSION >= 4 || GLUT_XLIB_IMPLEMENTATION >= 9)
+GLUTAPI void APIENTRY glutInitDisplayString(const char *string);
+#endif
+GLUTAPI void APIENTRY glutInitWindowPosition(int x, int y);
+GLUTAPI void APIENTRY glutInitWindowSize(int width, int height);
+GLUTAPI void APIENTRY glutMainLoop(void);
+
+/* GLUT window sub-API. */
+GLUTAPI int APIENTRY glutCreateWindow(const char *title);
+#if defined(_WIN32) && !defined(GLUT_DISABLE_ATEXIT_HACK)
+GLUTAPI int APIENTRY __glutCreateWindowWithExit(const char *title, void (__cdecl *exitfunc)(int));
+#ifndef GLUT_BUILDING_LIB
+static int APIENTRY glutCreateWindow_ATEXIT_HACK(const char *title) { return __glutCreateWindowWithExit(title, exit); }
+#define glutCreateWindow glutCreateWindow_ATEXIT_HACK
+#endif
+#endif
+GLUTAPI int APIENTRY glutCreateSubWindow(int win, int x, int y, int width, int height);
+GLUTAPI void APIENTRY glutDestroyWindow(int win);
+GLUTAPI void APIENTRY glutPostRedisplay(void);
+#if (GLUT_API_VERSION >= 4 || GLUT_XLIB_IMPLEMENTATION >= 11)
+GLUTAPI void APIENTRY glutPostWindowRedisplay(int win);
+#endif
+GLUTAPI void APIENTRY glutSwapBuffers(void);
+GLUTAPI int APIENTRY glutGetWindow(void);
+GLUTAPI void APIENTRY glutSetWindow(int win);
+GLUTAPI void APIENTRY glutSetWindowTitle(const char *title);
+GLUTAPI void APIENTRY glutSetIconTitle(const char *title);
+GLUTAPI void APIENTRY glutPositionWindow(int x, int y);
+GLUTAPI void APIENTRY glutReshapeWindow(int width, int height);
+GLUTAPI void APIENTRY glutPopWindow(void);
+GLUTAPI void APIENTRY glutPushWindow(void);
+GLUTAPI void APIENTRY glutIconifyWindow(void);
+GLUTAPI void APIENTRY glutShowWindow(void);
+GLUTAPI void APIENTRY glutHideWindow(void);
+#if (GLUT_API_VERSION >= 3)
+GLUTAPI void APIENTRY glutFullScreen(void);
+GLUTAPI void APIENTRY glutSetCursor(int cursor);
+#if (GLUT_API_VERSION >= 4 || GLUT_XLIB_IMPLEMENTATION >= 9)
+GLUTAPI void APIENTRY glutWarpPointer(int x, int y);
+#endif
+
+/* GLUT overlay sub-API. */
+GLUTAPI void APIENTRY glutEstablishOverlay(void);
+GLUTAPI void APIENTRY glutRemoveOverlay(void);
+GLUTAPI void APIENTRY glutUseLayer(GLenum layer);
+GLUTAPI void APIENTRY glutPostOverlayRedisplay(void);
+#if (GLUT_API_VERSION >= 4 || GLUT_XLIB_IMPLEMENTATION >= 11)
+GLUTAPI void APIENTRY glutPostWindowOverlayRedisplay(int win);
+#endif
+GLUTAPI void APIENTRY glutShowOverlay(void);
+GLUTAPI void APIENTRY glutHideOverlay(void);
+#endif
+
+/* GLUT menu sub-API. */
+GLUTAPI int APIENTRY glutCreateMenu(void (GLUTCALLBACK *func)(int));
+#if defined(_WIN32) && !defined(GLUT_DISABLE_ATEXIT_HACK)
+GLUTAPI int APIENTRY __glutCreateMenuWithExit(void (GLUTCALLBACK *func)(int), void (__cdecl *exitfunc)(int));
+#ifndef GLUT_BUILDING_LIB
+static int APIENTRY glutCreateMenu_ATEXIT_HACK(void (GLUTCALLBACK *func)(int)) { return __glutCreateMenuWithExit(func, exit); }
+#define glutCreateMenu glutCreateMenu_ATEXIT_HACK
+#endif
+#endif
+GLUTAPI void APIENTRY glutDestroyMenu(int menu);
+GLUTAPI int APIENTRY glutGetMenu(void);
+GLUTAPI void APIENTRY glutSetMenu(int menu);
+GLUTAPI void APIENTRY glutAddMenuEntry(const char *label, int value);
+GLUTAPI void APIENTRY glutAddSubMenu(const char *label, int submenu);
+GLUTAPI void APIENTRY glutChangeToMenuEntry(int item, const char *label, int value);
+GLUTAPI void APIENTRY glutChangeToSubMenu(int item, const char *label, int submenu);
+GLUTAPI void APIENTRY glutRemoveMenuItem(int item);
+GLUTAPI void APIENTRY glutAttachMenu(int button);
+GLUTAPI void APIENTRY glutDetachMenu(int button);
+
+/* GLUT window callback sub-API. */
+GLUTAPI void APIENTRY glutDisplayFunc(void (GLUTCALLBACK *func)(void));
+GLUTAPI void APIENTRY glutReshapeFunc(void (GLUTCALLBACK *func)(int width, int height));
+GLUTAPI void APIENTRY glutKeyboardFunc(void (GLUTCALLBACK *func)(unsigned char key, int x, int y));
+GLUTAPI void APIENTRY glutMouseFunc(void (GLUTCALLBACK *func)(int button, int state, int x, int y));
+GLUTAPI void APIENTRY glutMotionFunc(void (GLUTCALLBACK *func)(int x, int y));
+GLUTAPI void APIENTRY glutPassiveMotionFunc(void (GLUTCALLBACK *func)(int x, int y));
+GLUTAPI void APIENTRY glutEntryFunc(void (GLUTCALLBACK *func)(int state));
+GLUTAPI void APIENTRY glutVisibilityFunc(void (GLUTCALLBACK *func)(int state));
+GLUTAPI void APIENTRY glutIdleFunc(void (GLUTCALLBACK *func)(void));
+GLUTAPI void APIENTRY glutTimerFunc(unsigned int millis, void (GLUTCALLBACK *func)(int value), int value);
+GLUTAPI void APIENTRY glutMenuStateFunc(void (GLUTCALLBACK *func)(int state));
+#if (GLUT_API_VERSION >= 2)
+GLUTAPI void APIENTRY glutSpecialFunc(void (GLUTCALLBACK *func)(int key, int x, int y));
+GLUTAPI void APIENTRY glutSpaceballMotionFunc(void (GLUTCALLBACK *func)(int x, int y, int z));
+GLUTAPI void APIENTRY glutSpaceballRotateFunc(void (GLUTCALLBACK *func)(int x, int y, int z));
+GLUTAPI void APIENTRY glutSpaceballButtonFunc(void (GLUTCALLBACK *func)(int button, int state));
+GLUTAPI void APIENTRY glutButtonBoxFunc(void (GLUTCALLBACK *func)(int button, int state));
+GLUTAPI void APIENTRY glutDialsFunc(void (GLUTCALLBACK *func)(int dial, int value));
+GLUTAPI void APIENTRY glutTabletMotionFunc(void (GLUTCALLBACK *func)(int x, int y));
+GLUTAPI void APIENTRY glutTabletButtonFunc(void (GLUTCALLBACK *func)(int button, int state, int x, int y));
+#if (GLUT_API_VERSION >= 3)
+GLUTAPI void APIENTRY glutMenuStatusFunc(void (GLUTCALLBACK *func)(int status, int x, int y));
+GLUTAPI void APIENTRY glutOverlayDisplayFunc(void (GLUTCALLBACK *func)(void));
+#if (GLUT_API_VERSION >= 4 || GLUT_XLIB_IMPLEMENTATION >= 9)
+GLUTAPI void APIENTRY glutWindowStatusFunc(void (GLUTCALLBACK *func)(int state));
+#endif
+#if (GLUT_API_VERSION >= 4 || GLUT_XLIB_IMPLEMENTATION >= 13)
+GLUTAPI void APIENTRY glutKeyboardUpFunc(void (GLUTCALLBACK *func)(unsigned char key, int x, int y));
+GLUTAPI void APIENTRY glutSpecialUpFunc(void (GLUTCALLBACK *func)(int key, int x, int y));
+GLUTAPI void APIENTRY glutJoystickFunc(void (GLUTCALLBACK *func)(unsigned int buttonMask, int x, int y, int z), int pollInterval);
+#endif
+#endif
+#endif
+
+/* GLUT color index sub-API. */
+GLUTAPI void APIENTRY glutSetColor(int, GLfloat red, GLfloat green, GLfloat blue);
+GLUTAPI GLfloat APIENTRY glutGetColor(int ndx, int component);
+GLUTAPI void APIENTRY glutCopyColormap(int win);
+
+/* GLUT state retrieval sub-API. */
+GLUTAPI int APIENTRY glutGet(GLenum type);
+GLUTAPI int APIENTRY glutDeviceGet(GLenum type);
+#if (GLUT_API_VERSION >= 2)
+/* GLUT extension support sub-API */
+GLUTAPI int APIENTRY glutExtensionSupported(const char *name);
+#endif
+#if (GLUT_API_VERSION >= 3)
+GLUTAPI int APIENTRY glutGetModifiers(void);
+GLUTAPI int APIENTRY glutLayerGet(GLenum type);
+#endif
+
+/* GLUT font sub-API */
+GLUTAPI void APIENTRY glutBitmapCharacter(void *font, int character);
+GLUTAPI int APIENTRY glutBitmapWidth(void *font, int character);
+GLUTAPI void APIENTRY glutStrokeCharacter(void *font, int character);
+GLUTAPI int APIENTRY glutStrokeWidth(void *font, int character);
+#if (GLUT_API_VERSION >= 4 || GLUT_XLIB_IMPLEMENTATION >= 9)
+GLUTAPI int APIENTRY glutBitmapLength(void *font, const unsigned char *string);
+GLUTAPI int APIENTRY glutStrokeLength(void *font, const unsigned char *string);
+#endif
+
+/* GLUT pre-built models sub-API */
+GLUTAPI void APIENTRY glutWireSphere(GLdouble radius, GLint slices, GLint stacks);
+GLUTAPI void APIENTRY glutSolidSphere(GLdouble radius, GLint slices, GLint stacks);
+GLUTAPI void APIENTRY glutWireCone(GLdouble base, GLdouble height, GLint slices, GLint stacks);
+GLUTAPI void APIENTRY glutSolidCone(GLdouble base, GLdouble height, GLint slices, GLint stacks);
+GLUTAPI void APIENTRY glutWireCube(GLdouble size);
+GLUTAPI void APIENTRY glutSolidCube(GLdouble size);
+GLUTAPI void APIENTRY glutWireTorus(GLdouble innerRadius, GLdouble outerRadius, GLint sides, GLint rings);
+GLUTAPI void APIENTRY glutSolidTorus(GLdouble innerRadius, GLdouble outerRadius, GLint sides, GLint rings);
+GLUTAPI void APIENTRY glutWireDodecahedron(void);
+GLUTAPI void APIENTRY glutSolidDodecahedron(void);
+GLUTAPI void APIENTRY glutWireTeapot(GLdouble size);
+GLUTAPI void APIENTRY glutSolidTeapot(GLdouble size);
+GLUTAPI void APIENTRY glutWireOctahedron(void);
+GLUTAPI void APIENTRY glutSolidOctahedron(void);
+GLUTAPI void APIENTRY glutWireTetrahedron(void);
+GLUTAPI void APIENTRY glutSolidTetrahedron(void);
+GLUTAPI void APIENTRY glutWireIcosahedron(void);
+GLUTAPI void APIENTRY glutSolidIcosahedron(void);
+
+#if (GLUT_API_VERSION >= 4 || GLUT_XLIB_IMPLEMENTATION >= 9)
+/* GLUT video resize sub-API. */
+GLUTAPI int APIENTRY glutVideoResizeGet(GLenum param);
+GLUTAPI void APIENTRY glutSetupVideoResizing(void);
+GLUTAPI void APIENTRY glutStopVideoResizing(void);
+GLUTAPI void APIENTRY glutVideoResize(int x, int y, int width, int height);
+GLUTAPI void APIENTRY glutVideoPan(int x, int y, int width, int height);
+
+/* GLUT debugging sub-API. */
+GLUTAPI void APIENTRY glutReportErrors(void);
+#endif
+
+#if (GLUT_API_VERSION >= 4 || GLUT_XLIB_IMPLEMENTATION >= 13)
+/* GLUT device control sub-API. */
+/* glutSetKeyRepeat modes. */
+#define GLUT_KEY_REPEAT_OFF		0
+#define GLUT_KEY_REPEAT_ON		1
+#define GLUT_KEY_REPEAT_DEFAULT		2
+
+/* Joystick button masks. */
+#define GLUT_JOYSTICK_BUTTON_A		1
+#define GLUT_JOYSTICK_BUTTON_B		2
+#define GLUT_JOYSTICK_BUTTON_C		4
+#define GLUT_JOYSTICK_BUTTON_D		8
+
+GLUTAPI void APIENTRY glutIgnoreKeyRepeat(int ignore);
+GLUTAPI void APIENTRY glutSetKeyRepeat(int repeatMode);
+GLUTAPI void APIENTRY glutForceJoystickFunc(void);
+
+/* GLUT game mode sub-API. */
+/* glutGameModeGet. */
+#define GLUT_GAME_MODE_ACTIVE           ((GLenum) 0)
+#define GLUT_GAME_MODE_POSSIBLE         ((GLenum) 1)
+#define GLUT_GAME_MODE_WIDTH            ((GLenum) 2)
+#define GLUT_GAME_MODE_HEIGHT           ((GLenum) 3)
+#define GLUT_GAME_MODE_PIXEL_DEPTH      ((GLenum) 4)
+#define GLUT_GAME_MODE_REFRESH_RATE     ((GLenum) 5)
+#define GLUT_GAME_MODE_DISPLAY_CHANGED  ((GLenum) 6)
+
+GLUTAPI void APIENTRY glutGameModeString(const char *string);
+GLUTAPI int APIENTRY glutEnterGameMode(void);
+GLUTAPI void APIENTRY glutLeaveGameMode(void);
+GLUTAPI int APIENTRY glutGameModeGet(GLenum mode);
+#endif
+
+#ifdef __cplusplus
+}
+
+#endif
+
+#ifdef GLUT_APIENTRY_DEFINED
+# undef GLUT_APIENTRY_DEFINED
+# undef APIENTRY
+#endif
+
+#ifdef GLUT_WINGDIAPI_DEFINED
+# undef GLUT_WINGDIAPI_DEFINED
+# undef WINGDIAPI
+#endif
+
+#ifdef GLUT_DEFINED___CDECL
+# undef GLUT_DEFINED___CDECL
+# undef __cdecl
+#endif
+
+#ifdef GLUT_DEFINED__CRTIMP
+# undef GLUT_DEFINED__CRTIMP
+# undef _CRTIMP
+#endif
+
+#endif                  /* __glut_h__ */

A4/glview.cpp

+#include "glview.h"
+#include <QMatrix4x4>
+#include <QDebug>
+
+
+
+GLView::GLView(Scene *scene,Camera * camera,Controler *controler )
+{
+    this->camera = camera;
+    this->scene = scene;
+    this->controler = controler;
+    gridSize = 5;
+    gridStepSize = 1;
+    isGridEnabled = false;
+    MIP = false;
+    afterInit = false;
+}
+
+QSize GLView::minimumSizeHint() const
+{
+    return QSize(50, 50);
+}
+
+QSize GLView::sizeHint() const
+{
+    return QSize(600, 400);
+}
+
+
+void GLView::initializeGL ( ) {
+    Q_ASSERT(initializeOpenGLFunctions());
+
+    glClearColor(0.0, 0.0, 0.0, 0.0);
+    glEnable(GL_DEPTH_TEST);
+
+
+    glEnable(GL_LIGHTING);
+    glEnable(GL_LIGHT0);
+    static GLfloat lightPosition[4] = { 0.0, 0.0, 4.0, 1.0 };
+    glLightfv(GL_LIGHT0, GL_POSITION, lightPosition);
+
+
+    uchar *trans = new uchar[4*256];
+
+    for(int i = 0; i < 256; i+=1){
+        int index = i*4;
+        trans[index] = i;
+        trans[index+1] = i;
+        trans[index+2] = i;
+        trans[index+3] = i;
+    }
+
+    loadTransfer(trans);
+
+    //Shader Setup
+    initShader();
+    shader->bind();
+    afterInit = true;
+}
+
+void GLView::initShader()
+{
+    QGLShader *vertex = new QGLShader(QGLShader::Vertex);
+    if(!vertex->compileSourceFile(QLatin1String(":/phong.vert")))
+        qCritical()<< "Vertex Shader failed"<< vertex->log();
+
+    QGLShader *fragment = new QGLShader(QGLShader::Fragment);
+    if(!fragment->compileSourceFile(QLatin1String(":/phong.frag")))
+        qCritical()<< "Fragment Shader failed"<< fragment->log();
+
+    shader = new QGLShaderProgram(this);
+    shader->addShader(vertex);
+    shader->addShader(fragment);
+    shader->bindAttributeLocation("pickID",4);
+    if(!shader->link()){
+        qCritical()<< "Linking  failed"<<shader->log();
+    }
+
+
+
+    vertex = new QGLShader(QGLShader::Vertex);
+    if(!vertex->compileSourceFile(QLatin1String(":/display.vert")))
+        qCritical()<< "Vertex Shader 2 failed"<< vertex->log();
+
+    fragment = new QGLShader(QGLShader::Fragment);
+    if(!fragment->compileSourceFile(QLatin1String(":/display.frag")))
+        qCritical()<< "Fragment Shader 2 failed"<< fragment->log();
+
+    displayShader = new QGLShaderProgram(this);
+    displayShader->addShader(vertex);
+    displayShader->addShader(fragment);
+    if(!displayShader->link()){
+        qCritical()<< "Linking 2 failed:"<<displayShader->log();
+    }
+
+}
+
+void GLView::home(){
+    camera->home();
+    updateGL();
+}
+
+void GLView::setMIP(bool mip){
+    this->MIP = mip;
+    updateGL();
+}
+
+
+
+void GLView::paintGL ()
+{
+    bool useFBO = true;
+    //QOpenGLFunctions functions = QOpenGLContext::currentContext()->functions();
+    // QGLFunctions functions = QGLFunctions(this->context());
+
+
+    shader->bind();
+    if(useFBO){
+        glBindFramebuffer(GL_FRAMEBUFFER,fbo);
+        GLenum buffers[] = {GL_COLOR_ATTACHMENT0,GL_COLOR_ATTACHMENT1,GL_COLOR_ATTACHMENT2,GL_COLOR_ATTACHMENT3};
+        glDrawBuffers(4,buffers);
+
+        //http://stackoverflow.com/questions/7207422/setting-up-opengl-multiple-render-targets
+    }
+
+
+    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+    glEnable(GL_DEPTH_TEST);
+    glDisable(GL_CULL_FACE);
+
+    glViewport(0,0,this->width(),this->height());
+
+    glMatrixMode (GL_MODELVIEW);
+    glLoadIdentity ();
+    glMatrixMode (GL_PROJECTION);
+    glLoadIdentity ();
+
+
+
+    shader->setUniformValue("shaded",true);
+
+
+    //set Projection and Camera Rotation
+    camera->setupCamera(aspect);
+
+    //draw Scene
+    scene->draw(shader);
+
+    shader->setAttributeValue(3,0);
+
+    if(isGridEnabled){
+        drawGrid();
+    }
+
+
+
+    if(isActive){
+        glDisable(GL_DEPTH_TEST);
+        glMatrixMode (GL_MODELVIEW);
+        glLoadIdentity ();
+        glMatrixMode (GL_PROJECTION);
+        glLoadIdentity ();
+        shader->setUniformValue("shaded",false);
+        glLineWidth(10);
+        GLfloat color[] = {1.0,1.0,0.0};
+        glMaterialfv(GL_FRONT,GL_AMBIENT,color);
+        glMaterialfv(GL_FRONT,GL_DIFFUSE,color);
+        glMaterialfv(GL_FRONT,GL_SPECULAR,color);
+        glMaterialf(GL_FRONT,GL_SHININESS,128);
+
+        glBegin (GL_LINE_LOOP);
+        glVertex3i (-1, -1, 0);
+        glVertex3i (1, -1, 0);
+        glVertex3i (1, 1, 0);
+        glVertex3i (-1, 1, 0);
+        glEnd ();
+    }
+
+    shader->release();
+    if(useFBO){
+        displayShader->bind();
+        displayShader->setUniformValue("MIP", MIP);
+
+        QMatrix4x4 mat = QMatrix4x4();
+        mat.rotate(*camera->rotation);
+        displayShader->setUniformValue("NormalMatrix",mat.inverted().transposed());
+        //
+
+        glBindFramebuffer(GL_FRAMEBUFFER,0);
+        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+        glViewport(0,0,this->width(),this->height());
+        glMatrixMode (GL_MODELVIEW);
+        glLoadIdentity ();
+        glMatrixMode (GL_PROJECTION);
+        glLoadIdentity ();
+
+        glActiveTexture(GL_TEXTURE0);
+        glBindTexture(GL_TEXTURE_2D,color);
+        displayShader->setUniformValue("Texture",0);
+
+        glActiveTexture(GL_TEXTURE1);
+        glBindTexture(GL_TEXTURE_2D,picID);
+        displayShader->setUniformValue("PickID",1);
+
+        glActiveTexture(GL_TEXTURE2);
+        glBindTexture(GL_TEXTURE_2D,startRay);
+        displayShader->setUniformValue("StartRay",2);
+
+        glActiveTexture(GL_TEXTURE3);
+        glBindTexture(GL_TEXTURE_2D,stopRay);
+        displayShader->setUniformValue("StopRay",3);
+
+        glActiveTexture(GL_TEXTURE4);
+        glBindTexture(GL_TEXTURE_3D,texture3D);
+        displayShader->setUniformValue("volumeData",4);
+
+        glActiveTexture(GL_TEXTURE5);
+        glBindTexture(GL_TEXTURE_1D,transferFunction);
+        displayShader->setUniformValue("transferData",5);
+
+        //displayShader->setUniformValue("active",scene->getActive()->getID());
+
+        glBegin (GL_QUADS);
+        glTexCoord2d(0,0);
+        glVertex3i (-1, -1, 0);
+        glTexCoord2d(1,0);
+        glVertex3i (1, -1, 0);
+        glTexCoord2d(1,1);
+        glVertex3i (1, 1, 0);
+        glTexCoord2d(0,1);
+        glVertex3i (-1, 1, 0);
+        glEnd ();
+
+
+
+        displayShader->release();
+
+    }
+
+}
+
+
+void GLView::drawGrid()
+{
+    shader->release();
+
+    GLfloat specularColor[] = {0,0,0};
+    GLfloat shininess[] = {128};
+    glMaterialfv(GL_FRONT,GL_SPECULAR,specularColor);
+    glMaterialfv(GL_FRONT,GL_SHININESS, shininess);
+    GLfloat grey[] = {1,0.5,0.5};
+    glMaterialfv(GL_FRONT,GL_DIFFUSE,grey);
+    glNormal3f(0,1,0);
+
+    glDisable(GL_LIGHTING);
+    glEnable(GL_COLOR_MATERIAL);
+
+    glLineWidth(1);
+    glPolygonMode(GL_FRONT_AND_BACK,GL_LINES);
+    glBegin(GL_LINES);
+    float stepSize = gridStepSize;
+    float x = stepSize;
+    float y = stepSize;
+    if (stepSize <= 0) stepSize = 1;
+
+    for(; x < gridSize; x += stepSize){
+        glVertex3f(x,0,-gridSize);
+        glVertex3f(x,0,gridSize);
+        glVertex3f(-x,0,-gridSize);
+        glVertex3f(-x,0,gridSize);
+    }
+    for (; y < gridSize; y += stepSize){
+        glVertex3f(-gridSize, 0, y);
+        glVertex3f(gridSize,0,y);
+        glVertex3f(-gridSize,0,-y);
+        glVertex3f(gridSize,0,-y);
+    }
+    glEnd();
+
+    glBegin(GL_LINES);
+    x = stepSize;
+    y = stepSize;
+    if (stepSize <= 0) stepSize = 1;
+
+    for(; x < gridSize; x += stepSize){
+        glVertex3f(0,x,-gridSize);
+        glVertex3f(0,x,gridSize);
+        glVertex3f(0,-x,-gridSize);
+        glVertex3f(0,-x,gridSize);
+    }
+    for (; y < gridSize; y += stepSize){
+        glVertex3f(0,-gridSize,  y);
+        glVertex3f(0,gridSize,y);
+        glVertex3f(0,-gridSize,-y);
+        glVertex3f(0,gridSize,-y);
+    }
+    glEnd();
+
+    glBegin(GL_LINES);
+    x = stepSize;
+    y = stepSize;
+    if (stepSize <= 0) stepSize = 1;
+
+    for(; x < gridSize; x += stepSize){
+        glVertex3f(x,-gridSize,0);
+        glVertex3f(x,gridSize,0);
+        glVertex3f(-x,-gridSize,0);
+        glVertex3f(-x,gridSize,0);
+    }
+    for (; y < gridSize; y += stepSize){
+        glVertex3f(-gridSize, y,0);
+        glVertex3f(gridSize,y,0);
+        glVertex3f(-gridSize,-y,0);
+        glVertex3f(gridSize,-y,0);
+    }
+    glEnd();
+
+    glBegin(GL_LINES);
+    glVertex3f(0,0,-gridSize);
+    glVertex3f(0,0,gridSize);
+    glEnd();
+    glBegin(GL_LINES);
+    glVertex3f(-gridSize,0,0);
+    glVertex3f(gridSize,0,0);
+    glEnd();
+    glBegin(GL_LINES);
+    glVertex3f(0,-gridSize,0);
+    glVertex3f(0,gridSize,0);
+    glEnd();
+
+
+
+
+    glPolygonMode(GL_FRONT,GL_FILL);
+    glEnable(GL_LIGHTING);
+    shader->bind();
+
+}
+
+void GLView::resizeGL(int width , int height )
+{
+    aspect = 1.0*width/height;
+
+    //QGLFunctions functions = QGLFunctions(this->context());
+    //QOpenGLFunctions_4_3_Core functions = *this;
+
+    glGenFramebuffers(1, &fbo);
+    glBindFramebuffer(GL_FRAMEBUFFER,fbo);
+
+
+
+    // Create the color buffer
+    glGenTextures(1, &color);
+    glBindTexture(GL_TEXTURE_2D, color);
+    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
+
+
+    // Create the pcik buffer
+    glGenTextures(1, &picID);
+    glBindTexture(GL_TEXTURE_2D, picID);
+    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
+
+
+    // Create the pcik startRay
+    glGenTextures(1, &startRay);
+    glBindTexture(GL_TEXTURE_2D, startRay);
+    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
+
+    // Create the pcik stopRay
+    glGenTextures(1, &stopRay);
+    glBindTexture(GL_TEXTURE_2D, stopRay);
+    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
+
+
+
+    // Create the depth buffer
+    glGenRenderbuffers(1, &depth);
+    glBindRenderbuffer(GL_RENDERBUFFER, depth);
+    glRenderbufferStorage(GL_RENDERBUFFER,GL_DEPTH_COMPONENT,width,height);
+
+    glFramebufferTexture2D(GL_FRAMEBUFFER,GL_COLOR_ATTACHMENT0,GL_TEXTURE_2D,color,0);
+    glFramebufferTexture2D(GL_FRAMEBUFFER,GL_COLOR_ATTACHMENT1,GL_TEXTURE_2D,picID,0);
+    glFramebufferTexture2D(GL_FRAMEBUFFER,GL_COLOR_ATTACHMENT2,GL_TEXTURE_2D,startRay,0);
+    glFramebufferTexture2D(GL_FRAMEBUFFER,GL_COLOR_ATTACHMENT3,GL_TEXTURE_2D,stopRay,0);
+    glFramebufferRenderbuffer(GL_FRAMEBUFFER,GL_DEPTH_ATTACHMENT,GL_RENDERBUFFER,depth);
+
+    GLenum err = glCheckFramebufferStatus(GL_FRAMEBUFFER);
+    if(err == GL_FRAMEBUFFER_COMPLETE){
+        // qDebug()<<"FBO OK";
+    } else {
+        qDebug()<<"FBO ERROR"<<err;
+    }
+
+    glBindFramebuffer(GL_FRAMEBUFFER, 0);
+
+
+}
+
+void GLView::loadData(int width, int height, int depth, char* data, int type  )
+{
+
+    glEnable(GL_TEXTURE_3D);
+    glGenTextures( 1, &texture3D );
+    glBindTexture(GL_TEXTURE_3D, texture3D);
+
+    // Filtering
+    glTexParameteri( GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
+    glTexParameteri( GL_TEXTURE_3D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
+
+    // Wrap
+    glTexParameteri( GL_TEXTURE_3D, GL_TEXTURE_WRAP_S, GL_CLAMP );
+    glTexParameteri( GL_TEXTURE_3D, GL_TEXTURE_WRAP_T, GL_CLAMP );
+    glTexParameteri( GL_TEXTURE_3D, GL_TEXTURE_WRAP_R, GL_CLAMP );
+
+    glTexImage3D( GL_TEXTURE_3D, 0, GL_R8,//
+                  width, height, depth,  0,
+                  GL_RED,type , data); // Imagedata as ByteBuffer
+}
+
+void GLView::loadTransfer(uchar* data )
+{
+//    uchar *test = new uchar[4*256];
+
+//    for(int i = 0; i< 4*256;i++){
+//       test[i] = data[i];
+//    }
+    glGenTextures( 1, &transferFunction );
+    glBindTexture(GL_TEXTURE_1D, transferFunction);
+
+    // Filtering
+    glTexParameteri( GL_TEXTURE_1D, GL_TEXTURE_MIN_FILTER, GL_NEAREST );
+    glTexParameteri( GL_TEXTURE_1D, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
+
+    // Wrap
+    glTexParameteri( GL_TEXTURE_1D, GL_TEXTURE_WRAP_S, GL_CLAMP );
+
+    glTexImage1D(GL_TEXTURE_1D,0,GL_RGBA,256,0,GL_RGBA,GL_UNSIGNED_BYTE,data);
+   if(afterInit) updateGL();
+}
+
+
+
+void GLView::setAcive(bool active)
+{
+    this->isActive = active;
+    updateGL();
+}
+
+Camera *GLView::getCamera()
+{
+    return this->camera;
+}
+
+
+void GLView::mousePressEvent(QMouseEvent *event )
+{
+    controler->mousePressed(this,event);
+}
+
+void GLView::mouseMoveEvent(QMouseEvent *event )
+{
+    controler->mouseMoveEvent(this,event);
+}
+
+void GLView::wheelEvent(QWheelEvent *event )
+{
+    controler->wheelEvent(this,event);
+}
+

A4/glview.h

+#ifndef GLVIEW_H
+#define GLVIEW_H
+
+#include <QtGui>
+#include <QtOpenGL>
+
+#include <controler.h>
+#include <camera.h>
+#include <scene.h>
+#include <gl/GLU.h>
+#include <QGLFunctions>
+#include <QOpenGLFunctions_4_3_Core>
+
+class GLView : public QGLWidget, public QOpenGLFunctions_4_3_Core
+{
+    Q_OBJECT
+protected :
+    void initializeGL ( ) ;
+    void paintGL ( ) ;
+    void resizeGL(int width , int height ) ;
+    void mousePressEvent(QMouseEvent *event ) ;
+    void mouseMoveEvent(QMouseEvent *event ) ;
+    void wheelEvent(QWheelEvent *event ) ;
+
+public slots:
+    void home();
+    void setGridSize(int size){gridSize = size;}
+    void setGridStepSize(int size){gridStepSize = size;}
+    void showGrid(bool bo){isGridEnabled = bo;}
+    void loadData(int width, int height, int depth, char* data, int type);
+    void loadTransfer(uchar* data);
+    void setMIP(bool mip);
+
+public:
+    GLView(Scene *scene,Camera * camera,Controler *controler );
+    void setHome(QQuaternion *rotation, QVector3D *translation);
+
+
+    QSize minimumSizeHint() const;
+    QSize sizeHint() const;
+
+
+    void setAcive(bool active);
+    Camera *getCamera();
+
+private:
+    bool afterInit;
+    QGLShaderProgram *shader;
+    QGLShaderProgram *displayShader;
+    Scene *scene;
+
+    Controler *controler;
+    Camera *camera;
+
+    bool isActive;
+
+    GLdouble aspect;
+
+    GLuint fbo;
+    GLuint color;
+    GLuint picID;
+    GLuint depth;
+
+    GLuint startRay;
+    GLuint stopRay;
+
+    GLuint texture3D;
+    GLuint transferFunction;
+     bool MIP;
+
+
+    void drawGrid();
+    void initShader();
+
+    float gridStepSize;
+    float gridSize;
+    bool isGridEnabled;
+};
+
+#endif // GLVIEW_H

A4/hellocube.pro

+#-------------------------------------------------
+#
+# Project created by QtCreator 2015-10-20T21:54:27
+#
+#-------------------------------------------------
+
+QT       += core gui opengl
+
+greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
+
+TARGET = hellocube
+TEMPLATE = app
+
+LIBS += -lglut64
+LIBS += -L$$PWD/glut
+
+SOURCES += main.cpp\
+        mainwindow.cpp \
+    cubewidget.cpp \
+    glview.cpp \
+    scene.cpp \
+    controler.cpp \
+    camera.cpp \
+    sceneprimitive.cpp \
+    sceneobject.cpp \
+    scenenode.cpp \
+    treedelegate.cpp \
+    scenevolume.cpp \
+    transferfunctioneditor.cpp
+
+HEADERS  += mainwindow.h \
+    cubewidget.h \
+    glview.h \
+    scene.h \
+    controler.h \
+    camera.h \
+    sceneprimitive.h \
+    sceneobject.h \
+    scenenode.h \
+    glut.h \
+    treedelegate.h \
+    scenevolume.h \
+    transferfunctioneditor.h
+
+RESOURCES += \
+    hellocube.qrc
+
+DISTFILES += \
+    phong.frag \
+    phong.vert \
+    display.frag \
+    display.vert
+
+FORMS +=

A4/hellocube.pro.user

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A4/hellocube.qrc

+<RCC>
+    <qresource prefix="/">
+        <file>img/cam_home.png</file>
+        <file>img/flat.png</file>
+        <file>img/gouraud.png</file>
+        <file>img/phong.png</file>
+        <file>img/wireframe.png</file>
+        <file>phong.frag</file>
+        <file>phong.vert</file>
+        <file>img/box.png</file>
+        <file>img/camera.png</file>
+        <file>img/cone.png</file>
+        <file>img/cylinder.png</file>
+        <file>img/select.png</file>
+        <file>img/sphere.png</file>
+        <file>img/torus.png</file>
+        <file>img/view-dual.png</file>
+        <file>img/viewports.png</file>
+        <file>img/view-single.png</file>
+        <file>img/delete.png</file>
+        <file>display.frag</file>
+        <file>display.vert</file>
+    </qresource>
+</RCC>

A4/main.cpp

+#include "mainwindow.h"
+#include <QApplication>
+
+
+int main(int argc, char *argv[])
+{
+    QApplication a(argc, argv);
+    MainWindow w;
+    w.show();
+
+    return a.exec();
+}

A4/mainwindow.cpp

+#include "mainwindow.h"
+#include <treedelegate.h>
+
+
+void MainWindow::initViews()
+{
+    Camera *perspectiveCam = new Camera(true);
+    perspectiveView = new GLView(scene,perspectiveCam,controler);
+
+    Camera *frontCam = new Camera(false);
+    frontCam->setHome(new QQuaternion(), new QVector3D(0.0,0.0,-4.0));
+    frontView = new GLView(scene,frontCam,controler);
+
+
+    Camera *leftCam = new Camera(false);
+    leftCam->setHome(new QQuaternion(QQuaternion::fromAxisAndAngle(0.0,1.0,0.0,90.0).toVector4D()),
+                     new QVector3D(0.0,0.0,-4.0));
+    leftView = new GLView(scene,leftCam,controler);
+
+    Camera *topCam = new Camera(false);
+    topCam->setHome(new QQuaternion(QQuaternion::fromAxisAndAngle(1.0,0.0,0.0,90.0).toVector4D()),
+                    new QVector3D(0.0,0.0,-4.0));
+    topView = new GLView(scene,topCam,controler);
+
+    views = new GLView*[4];
+    views[0] = perspectiveView;
+    views[1] = frontView;
+    views[2] = leftView;
+    views[3] = topView;
+
+
+}
+
+void MainWindow::initSplits()
+{
+    viewGoup = new QActionGroup(this);
+    viewMenu = new QMenu("View",this);
+
+    topSplit = new QSplitter(Qt::Horizontal,this);
+    bottomSplit = new QSplitter(Qt::Horizontal,this);
+    verticalSplit = new QSplitter(Qt::Vertical,this);
+
+    topSplit->addWidget(perspectiveView);
+    topSplit->addWidget(frontView);
+
+    bottomSplit->addWidget(leftView);
+    bottomSplit->addWidget(topView);
+
+    verticalSplit->addWidget(topSplit);
+    verticalSplit->addWidget(bottomSplit);
+
+    setCentralWidget(verticalSplit);
+
+    showQuad();
+    //
+
+    //View Actions
+    singleView = new QAction("Single View",this);
+    singleView->setShortcut(QKeySequence("1"));
+    singleView->setCheckable(true);
+
+    singleView->setIcon(QIcon(":/img/view-single.png"));
+    connect(singleView, SIGNAL(triggered()), this, SLOT(showSingle()));
+    viewGoup->addAction(singleView);
+
+    dualView = new QAction("Dual View",this);
+    dualView->setShortcut(QKeySequence("2"));
+    dualView->setCheckable(true);
+    dualView->setIcon(QIcon(":/img/view-dual.png"));
+    connect(dualView, SIGNAL(triggered()), this, SLOT(showDual()));
+    viewGoup->addAction(dualView);
+
+    quadView = new QAction("Quad View",this);
+    quadView->setShortcut(QKeySequence("4"));
+    quadView->setCheckable(true);
+    quadView->setChecked(true);
+    quadView->setIcon(QIcon(":/img/viewports.png"));
+
+    connect(quadView, SIGNAL(triggered()), this, SLOT(showQuad()));
+    viewGoup->addAction(quadView);
+
+    viewMenu->addAction(singleView);
+    viewMenu->addAction(dualView);
+    viewMenu->addAction(quadView);
+}
+
+void MainWindow::initToolbar()
+{
+    toolBar->addAction(cameraMode);
+    toolBar->addAction(editMode);
+
+    toolBar->addSeparator();
+    toolBar->addAction(camHome);
+    toolBar->addSeparator();
+
+    toolBar->addWidget(showGridButton);
+    toolBar->addWidget(gridSizeInput);
+    toolBar->addWidget(gridStepInput);
+    toolBar->addWidget(MIPButton);
+
+    toolBar->addSeparator();
+
+
+    QToolButton* toolButton = new QToolButton();
+    toolButton->setIcon(QIcon(":/img/viewports.png"));
+    toolButton->setMenu(viewMenu);
+    toolButton->setPopupMode(QToolButton::InstantPopup);
+    QWidgetAction* toolButtonAction = new QWidgetAction(this);
+    toolButtonAction->setDefaultWidget(toolButton);
+    toolBar->addAction(toolButtonAction);
+
+
+    QToolButton* primitives = new QToolButton();
+    primitives->setIcon(QIcon(":/img/box.png"));
+    primitives->setMenu(primitivesMenu);
+    primitives->setPopupMode(QToolButton::InstantPopup);
+    QWidgetAction* primitiveActione = new QWidgetAction(this);
+    primitiveActione->setDefaultWidget(primitives);
+    toolBar->addAction(primitiveActione);
+
+    toolBar->addWidget(slider);
+
+    addToolBar( toolBar);
+
+}
+
+void MainWindow::initGrid()
+{
+    showGridButton = new QToolButton(toolBar);
+
+    showGridButton->setCheckable(true);
+
+    gridSizeInput = new QSpinBox(toolBar);
+    gridSizeInput->setRange(0,100);
+    gridSizeInput->setValue(5);
+
+    gridSizeInput->setToolTip("Grid Size");
+
+    gridStepInput = new QSpinBox(toolBar);
+    gridStepInput->setRange(1,10);
+
+    gridStepInput->setToolTip("Grid Step Size");
+
+    connect(gridSizeInput,SIGNAL(valueChanged(int)),perspectiveView,SLOT(setGridSize(int)));
+    connect(gridStepInput,SIGNAL(valueChanged(int)),perspectiveView,SLOT(setGridStepSize(int)));
+    connect(showGridButton,SIGNAL(clicked(bool)),perspectiveView,SLOT(showGrid(bool)));
+
+    connect(gridSizeInput,SIGNAL(valueChanged(int)),topView,SLOT(setGridSize(int)));
+    connect(gridStepInput,SIGNAL(valueChanged(int)),topView,SLOT(setGridStepSize(int)));
+    connect(showGridButton,SIGNAL(clicked(bool)),topView,SLOT(showGrid(bool)));
+
+    connect(gridSizeInput,SIGNAL(valueChanged(int)),leftView,SLOT(setGridSize(int)));
+    connect(gridStepInput,SIGNAL(valueChanged(int)),leftView,SLOT(setGridStepSize(int)));
+    connect(showGridButton,SIGNAL(clicked(bool)),leftView,SLOT(showGrid(bool)));
+
+    connect(gridSizeInput,SIGNAL(valueChanged(int)),frontView,SLOT(setGridSize(int)));
+    connect(gridStepInput,SIGNAL(valueChanged(int)),frontView,SLOT(setGridStepSize(int)));
+    connect(showGridButton,SIGNAL(clicked(bool)),frontView,SLOT(showGrid(bool)));
+
+    connect(gridSizeInput,SIGNAL(valueChanged(int)),this,SLOT(updateGL()));
+    connect(gridStepInput,SIGNAL(valueChanged(int)),this,SLOT(updateGL()));
+    connect(showGridButton,SIGNAL(clicked(bool)),this,SLOT(updateGL()));
+}
+
+void MainWindow::initPrimitivesMenu()
+{
+    primitivesMenu = new QMenu("Primitives",this);
+
+    spheresAdd = new QAction("Sphere",this);
+    spheresAdd->setIcon(QIcon(":/img/sphere.png"));
+    connect(spheresAdd, SIGNAL(triggered()), scene, SLOT(addSphere()));
+
+    boxesAdd = new QAction("Box",this);
+    boxesAdd->setIcon(QIcon(":/img/box.png"));
+    connect(boxesAdd, SIGNAL(triggered()), scene, SLOT(addCube()));
+
+    cylindersAdd = new QAction("Cylinder",this);
+    cylindersAdd->setIcon(QIcon(":/img/cylinder.png"));
+    connect(cylindersAdd, SIGNAL(triggered()), scene, SLOT(addCylinder()));
+
+    coneAdd = new QAction("Cone",this);
+    coneAdd->setIcon(QIcon(":/img/cone.png"));
+    connect(coneAdd, SIGNAL(triggered()), scene, SLOT(addCone()));
+
+    torusAdd = new QAction("Torus",this);
+    torusAdd->setIcon(QIcon(":/img/torus.png"));
+    connect(torusAdd, SIGNAL(triggered()), scene, SLOT(addTorus()));
+
+    groupAdd = new QAction("Group",this);
+    groupAdd->setIcon(QIcon(":/img/wireframe.png"));
+    connect(groupAdd, SIGNAL(triggered()), scene, SLOT(addNode()));
+
+    activeDelete = new QAction("Delete",this);
+    activeDelete->setIcon(QIcon(":/img/delete.png"));
+    connect(activeDelete, SIGNAL(triggered()), scene, SLOT(deletActive()));
+
+    volumeAdd = new QAction("Volume",this);
+    //activeDelete->setIcon(QIcon(":/img/delete.png"));
+    connect(volumeAdd, SIGNAL(triggered()), controler, SLOT(addVolume()));
+
+
+    primitivesMenu->addAction(spheresAdd);
+    primitivesMenu->addAction(boxesAdd);
+    primitivesMenu->addAction(cylindersAdd);
+    primitivesMenu->addAction(coneAdd);
+    primitivesMenu->addAction(torusAdd);
+    primitivesMenu->addAction(groupAdd);
+    primitivesMenu->addAction(activeDelete);
+    primitivesMenu->addAction(volumeAdd);
+}
+
+MainWindow::MainWindow(QWidget *parent)
+    : QMainWindow(parent)
+{
+    setWindowTitle("Hello Cube");
+
+    menuBar = new QMenuBar();
+    toolBar = new QToolBar("Shading",this);
+    statusBar = new QStatusBar(this);
+
+    //Views
+    scene = new Scene();
+    scene->setTesselation(1);
+    connect(scene,SIGNAL(activChanged()),this,SLOT(updateStatusBar()));
+    connect(scene,SIGNAL(activChanged()),this,SLOT(updateGL()));
+
+
+    controler = new Controler(this,scene);
+
+    initViews();
+
+    camHome = new QAction(QIcon(":/img/cam_home.png"),"Cam Home", toolBar);//vor set Active View
+    setActiveView(perspectiveView);
+
+    initSplits();
+
+
+    //File Menu Actions
+    fileMenu = new QMenu("&File");
+
+
+
+    exitAction = new QAction("E&xit",fileMenu);
+    exitAction->setShortcut(QKeySequence::Quit);
+    connect(exitAction, SIGNAL(triggered()), this, SLOT(close()));
+
+
+    MIPButton = new QToolButton(toolBar);
+    MIPButton->setCheckable(true);
+    connect(MIPButton, SIGNAL(clicked(bool)), perspectiveView, SLOT(setMIP(bool)));
+    connect(MIPButton, SIGNAL(clicked(bool)), frontView, SLOT(setMIP(bool)));
+    connect(MIPButton, SIGNAL(clicked(bool)), leftView, SLOT(setMIP(bool)));
+    connect(MIPButton, SIGNAL(clicked(bool)), topView, SLOT(setMIP(bool)));
+
+
+
+    //Interaction Actions
+    interactionGroup = new QActionGroup(this);
+    interactionMenu = new QMenu("Interaction",this);
+
+    cameraMode = new QAction("Camera",this);
+    cameraMode->setCheckable(true);
+    cameraMode->setIcon(QIcon(":/img/camera.png"));
+    cameraMode->setChecked(true);
+    connect(cameraMode, SIGNAL(triggered()), controler, SLOT(setCamMode()));
+    interactionGroup->addAction(cameraMode);
+
+    editMode = new QAction("Edit",this);
+    editMode->setCheckable(true);
+    editMode->setIcon(QIcon(":/img/select.png"));
+    connect(editMode, SIGNAL(triggered()), controler, SLOT(setEditMode()));
+    interactionGroup->addAction(editMode);
+
+
+    //Other Actions
+    aboutAction = new QAction("About",menuBar);
+    connect(aboutAction,SIGNAL(triggered()),this,SLOT(showAboutBox()));
+
+    slider = new QSlider(Qt::Horizontal,toolBar);
+    slider->setMinimum( 0 );
+    slider->setMaximum( 4 );
+    connect(slider,SIGNAL(valueChanged(int)),scene,SLOT(setTesselation(int)));
+    slider->setValue( 1 );
+
+    // Add Primitives
+
+    initPrimitivesMenu();
+
+    initGrid();
+
+
+
+
+
+    // Assemble Menus
+    fileMenu->addAction(exitAction);
+    menuBar->addMenu(fileMenu);
+    menuBar->addMenu(primitivesMenu);
+    menuBar->addAction(aboutAction);
+
+    setMenuBar(menuBar);
+
+    //Assemble Tool Bar
+    initToolbar();
+
+    timer= new QTimer(this);
+
+    connect(timer, SIGNAL(timeout()),this,SLOT(initScene()));
+    timer->start(1000);
+
+    setStatusBar(statusBar);
+    initDoc();
+
+
+}
+
+void MainWindow::initScene(){
+    //scene->simpleScene();
+    // controler->addVolume("D:/Projekte/GraPa/A3/MRI-head.raw");
+
+    timer->stop();
+}
+
+
+void MainWindow::initDoc()
+{
+    QDockWidget *dock = new QDockWidget("Scene", this);
+    dock->setAllowedAreas(Qt::LeftDockWidgetArea | Qt::RightDockWidgetArea);
+
+    sceneView = new QTreeView(this);
+    sceneView->setSelectionBehavior(QAbstractItemView::SelectRows);
+    sceneView->expandAll();
+    sceneView->setModel(scene);
+    TreeDelegate *delegate = new TreeDelegate();
+    sceneView->setItemDelegate(delegate);
+    connect(sceneView,SIGNAL(clicked(QModelIndex)),scene, SLOT(objectSelected(QModelIndex)));
+    connect(delegate,SIGNAL(nameChanged()),this, SLOT(updateStatusBar()));
+
+    dock->setWidget(sceneView);
+
+    //Transfer Function Doc
+    QDockWidget *transferDock = new QDockWidget("Transfer Function Editor",this);
+    transferDock->setAllowedAreas(Qt::LeftDockWidgetArea | Qt::RightDockWidgetArea);
+
+    transEditor = new TransferFunctionEditor(this);
+
+    connect(transEditor,SIGNAL(dataChanged(uchar*)),perspectiveView,SLOT(loadTransfer(uchar*)));
+    connect(transEditor,SIGNAL(dataChanged(uchar*)),frontView,SLOT(loadTransfer(uchar*)));
+    connect(transEditor,SIGNAL(dataChanged(uchar*)),leftView,SLOT(loadTransfer(uchar*)));
+    connect(transEditor,SIGNAL(dataChanged(uchar*)),topView,SLOT(loadTransfer(uchar*)));
+    connect(transEditor,SIGNAL(dataChanged(uchar*)),this,SLOT(updateGL()));
+
+
+
+    QPushButton *save = new QPushButton("Save");
+    connect(save,SIGNAL(released()),transEditor,SLOT(save()));
+    QPushButton *load = new QPushButton("Load");
+    connect(load,SIGNAL(released()),transEditor,SLOT(load()));
+    QPushButton *reset = new QPushButton("Reset");
+    connect(reset,SIGNAL(released()),transEditor,SLOT(reset()));
+    QPushButton *Smooth = new QPushButton("smooth");
+    connect(Smooth,SIGNAL(released()),transEditor,SLOT(smooth()));
+
+    QCheckBox *red = new QCheckBox("red");
+    red->setChecked(true);
+    connect(red,SIGNAL(clicked(bool)),transEditor,SLOT(paintRed(bool)));
+
+    QCheckBox *green = new QCheckBox("green");
+    green->setChecked(true);
+    connect(green,SIGNAL(clicked(bool)),transEditor,SLOT(paintGreen(bool)));
+
+    QCheckBox *blue = new QCheckBox("blue");
+    blue->setChecked(true);
+    connect(blue,SIGNAL(clicked(bool)),transEditor,SLOT(paintBlue(bool)));
+
+    QCheckBox *alpha = new QCheckBox("alpha");
+    alpha->setChecked(true);
+    connect(alpha,SIGNAL(clicked(bool)),transEditor,SLOT(paintAlpha(bool)));
+
+
+    QWidget *all = new QWidget;
+    QWidget *buttons = new QWidget;
+    QWidget *left = new QWidget;
+    QWidget *right = new QWidget;
+
+    QVBoxLayout *checkLayout = new QVBoxLayout;
+    checkLayout->addWidget(red);
+    checkLayout->addWidget(green);
+    checkLayout->addWidget(blue);
+    checkLayout->addWidget(alpha);
+    right->setLayout(checkLayout);
+
+    QGridLayout *butLayout = new QGridLayout;
+    butLayout->addWidget(save,0,0);
+    butLayout->addWidget(load,0,1);
+    butLayout->addWidget(reset,1,0);
+    butLayout->addWidget(Smooth,1,1);
+    left->setLayout(butLayout);
+
+    QHBoxLayout *buttonsLayout = new QHBoxLayout;
+    buttonsLayout->addWidget(left);
+    buttonsLayout->addWidget(right);
+    buttons->setLayout(buttonsLayout);
+
+    QVBoxLayout *allLayout = new QVBoxLayout;
+    allLayout->addWidget(transEditor);
+    allLayout->addWidget(buttons);
+    all->setLayout(allLayout);
+
+    transferDock->setWidget(all);
+
+    transferDock->setSizePolicy(QSizePolicy::Maximum,QSizePolicy::Maximum);
+    addDockWidget(Qt::RightDockWidgetArea, transferDock);
+    addDockWidget(Qt::RightDockWidgetArea, dock);
+}
+
+void MainWindow::updateStatusBar()
+{
+    QString text = scene->getActive()->getName();
+    statusBar->showMessage(text);
+}
+
+void MainWindow::showSingle(){
+    perspectiveView->show();
+    frontView->hide();
+    leftView->hide();
+    topView->hide();
+}
+void MainWindow::showDual(){
+
+    perspectiveView->show();
+    frontView->show();
+    leftView->hide();
+    topView->hide();
+}
+
+void MainWindow::showQuad(){
+
+    perspectiveView->show();
+    frontView->show();
+    leftView->show();
+    topView->show();
+
+}
+
+void MainWindow::updateGL()
+{
+    perspectiveView->updateGL();
+    frontView->updateGL();
+    leftView->updateGL();
+    topView->updateGL();
+}
+
+GLView** MainWindow::getViews(){
+    return views;
+
+}
+
+
+
+
+void MainWindow::setActiveView(GLView * active)
+{
+    perspectiveView->setAcive((perspectiveView == active));
+
+    frontView->setAcive((frontView == active));
+    leftView->setAcive((leftView == active));
+    topView->setAcive((topView == active));
+    disconnect(camHome, SIGNAL(triggered(bool)),perspectiveView,SLOT(home()));
+    disconnect(camHome, SIGNAL(triggered(bool)),frontView,SLOT(home()));
+    disconnect(camHome, SIGNAL(triggered(bool)),leftView,SLOT(home()));
+    disconnect(camHome, SIGNAL(triggered(bool)),topView,SLOT(home()));
+
+    connect(camHome, SIGNAL(triggered(bool)),active,SLOT(home()));
+}
+
+
+
+MainWindow::~MainWindow()
+{
+
+}
+
+void MainWindow::showAboutBox()
+{
+    QMessageBox msgBox;
+    msgBox.setWindowTitle("About Hello Cube!");
+    msgBox.setText("Written by Kai Westerkamp");
+    msgBox.exec();
+}

A4/mainwindow.h

+#ifndef MAINWINDOW_H
+#define MAINWINDOW_H
+
+#include <QMainWindow>
+#include <QMenu>
+#include <QMenuBar>
+#include <QAction>
+#include <QActionGroup>
+#include <QIcon>
+#include <QMessageBox>
+#include <QToolBar>
+#include <QStatusBar>
+#include <QSlider>
+#include <QSplitter>
+#include <QPushButton>
+
+#include <glview.h>
+#include <scene.h>
+#include <camera.h>
+#include <controler.h>
+#include <transferfunctioneditor.h>
+
+class MainWindow : public QMainWindow
+{
+    Q_OBJECT
+
+private:
+    QMenuBar *menuBar;
+
+    QMenu *fileMenu;
+    QAction *exitAction;
+
+    QMenu *interactionMenu;
+    QActionGroup *interactionGroup;
+    QAction *cameraMode;
+    QAction *editMode;
+
+    QMenu *viewMenu;
+    QActionGroup *viewGoup;
+    QAction *singleView;
+    QAction *dualView;
+    QAction *quadView;
+
+    QAction *aboutAction;
+
+    QAction *camHome;
+
+    QMenu *primitivesMenu;
+    QAction *spheresAdd;
+    QAction *boxesAdd;
+    QAction *cylindersAdd;
+    QAction *coneAdd;
+    QAction *torusAdd;
+    QAction *groupAdd;
+    QAction *activeDelete;
+    QAction *volumeAdd;
+
+
+    QToolBar *toolBar;
+    QStatusBar *statusBar;
+    QSlider *slider;
+
+    Scene* scene;
+    Controler *controler;
+
+    QSplitter *topSplit;
+    QSplitter *bottomSplit;
+    QSplitter *verticalSplit;
+
+    GLView *perspectiveView;
+    GLView *frontView;
+    GLView *leftView;
+    GLView *topView;
+    GLView **views;
+
+    QTreeView *sceneView;
+
+    QSpinBox* gridSizeInput;
+    QSpinBox* gridStepInput;
+    QToolButton* showGridButton;
+
+     QToolButton* MIPButton;
+
+    QTimer *timer;
+
+
+
+    void initDoc();
+
+    void initViews();
+
+public:
+    MainWindow(QWidget *parent = 0);
+    ~MainWindow();
+    void setActiveView(GLView * active);
+
+    GLView** getViews();
+
+    void initSplits();
+
+    void initToolbar();
+
+    void initGrid();
+
+    void initPrimitivesMenu();
+
+
+    TransferFunctionEditor *transEditor;
+
+public slots:
+    void updateGL();
+    void updateStatusBar();
+    void showAboutBox();
+    void showSingle();
+    void showDual();
+    void showQuad();
+     void initScene();
+};
+
+#endif // MAINWINDOW_H

A4/phong.frag

+uniform bool shaded;
+
+uniform bool volume;
+uniform sampler3D volumeData;
+
+varying vec4 pick;
+
+varying vec3 position;
+varying vec3 normal;
+
+void main(void)
+{
+    vec3 V = normalize(-position);
+
+     if(shaded){
+        vec3 N = normalize(normal);
+        vec3 L = normalize(gl_LightSource[0].position.xyz-position);
+
+        vec4 diffuse = vec4(max(dot(L,N),0.0));
+
+        vec4 Iamb = gl_FrontLightProduct[0].ambient;
+        vec4 Idiff = gl_FrontLightProduct[0].diffuse*diffuse;
+        Idiff = clamp(Idiff, 0.0, 1.0);
+
+
+        vec3 R = normalize(reflect(-L,N));
+
+        float specular = pow(max(dot(R,V),0.0),gl_FrontMaterial.shininess);//);
+        vec4 Ispec = gl_FrontLightProduct[0].specular * specular;
+        Ispec = clamp(Ispec, 0.0, 1.0);
+
+        vec4 color = (Iamb + Idiff + Ispec );
+
+        gl_FragData[0] =  color;
+    } else
+        gl_FragData[0] = vec4(1,1,0,1);
+
+    //gl_FragData[1] = pick;
+    gl_FragData[1] = vec4(abs(normal),1);
+
+    if(volume){
+        if(gl_FrontFacing){
+            gl_FragData[2] = gl_TexCoord[0];
+        //    gl_FragData[3] = vec4(0);
+
+        } else{
+         //   gl_FragData[2] = vec4(0);
+            gl_FragData[3] = gl_TexCoord[0];
+        }
+    } else {
+        gl_FragData[2] = vec4(0,0,0,1);
+        gl_FragData[3] = vec4(0,0,0,1);
+    }
+}

A4/phong.vert

+attribute vec4 gl_Vertex;
+attribute vec3 gl_Normal;
+
+attribute int pickID;
+
+
+uniform mat4 gl_ModelViewProjectionMatrix;
+uniform mat4 gl_ModelViewMatrix;
+uniform mat3 gl_NormalMatrix;
+
+varying vec3 position;
+varying vec3 normal;
+varying vec4 pick;
+
+
+void main(void)
+{
+    normal = normalize(gl_NormalMatrix * gl_Normal);
+    position = vec3(gl_ModelViewMatrix *gl_Vertex);
+
+    pick = vec4(pickID);
+    gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;
+
+    gl_TexCoord[0] = gl_MultiTexCoord0;
+
+
+}
+

A4/scene.cpp

+#include "scene.h"
+
+
+
+Scene::Scene(      )
+{
+    root = new SceneNode();
+    root->setName("<NONE>");
+    active = root;
+    activeIndex = QModelIndex();
+}
+
+Scene::~Scene(      )
+{
+    delete root;
+}
+
+int Scene::simpleScene()
+{
+    /*
+    addCube();
+    moveActive(QVector3D(4,0,0));
+
+    addSphere();
+    moveActive(QVector3D(1.5,0,0));
+
+    addCylinder();
+    moveActive(QVector3D(0,1.5,-1.5));
+
+    // addNode();
+
+    addTorus();
+    moveActive(QVector3D(0,0,-3));
+
+    addCone();
+    moveActive(QVector3D(0,-1.5,-1.5));
+    */
+
+    return active->getID();
+
+}
+
+void Scene::addSceneObjectTaActive(SceneObject *obj){
+
+    SceneNode* parent;
+    QModelIndex parentIndex;
+
+
+    if(active->isNode()){
+        parent = static_cast<SceneNode*>(active);
+        parentIndex = activeIndex;
+
+    } else {
+        parent  = static_cast<SceneNode*>(active->getParent());
+        parentIndex = activeIndex.parent();
+    }
+
+    beginInsertRows(parentIndex, parent->childCount(), parent->childCount());
+    parent->add(obj);
+    obj->setParent(parent);
+    endInsertRows();
+
+    activeIndex = index(parent->childCount()-1,0,parentIndex);
+    active = obj;
+    //qDebug()<<"Adding"<<obj->getName()<<" to "<<getItem(parentIndex)->getName()<<" Active"<<getItem(activeIndex)->getName();
+
+    emit activChanged();
+}
+
+void Scene::addCube()
+{
+    float color[] = {0.0,0.0,1.0};
+    ScenePrimitive *primitive = new ScenePrimitive(PrimitiveType::Quader,tesselation);
+    primitive->setMaterial(color);
+    addSceneObjectTaActive(primitive);
+}
+
+void Scene::addSphere()
+{
+    float color[] = {0.0,1.0,0.0};
+    ScenePrimitive *primitive = new ScenePrimitive(PrimitiveType::Sphere,tesselation);
+    primitive->setMaterial(color);
+    addSceneObjectTaActive(primitive);
+}
+
+void Scene::addCylinder()
+{
+    float color[] = {1.0,0.0,0.0};
+    ScenePrimitive *primitive = new ScenePrimitive(PrimitiveType::Cylinder,tesselation);
+    primitive->setMaterial(color);
+    addSceneObjectTaActive(primitive);
+}
+
+void Scene::addTorus()
+{
+    float color[] = {1.0,0.0,1.0};
+    ScenePrimitive *primitive = new ScenePrimitive(PrimitiveType::Torus,tesselation);
+    primitive->setMaterial(color);
+    addSceneObjectTaActive(primitive);
+}
+
+void Scene::addCone()
+{
+    float color[] = {0.0,1.0,1.0};
+    ScenePrimitive *primitive = new ScenePrimitive(PrimitiveType::Cone,tesselation);
+    primitive->setMaterial(color);
+    addSceneObjectTaActive(primitive);
+}
+
+void Scene::addNode()
+{
+    SceneNode *node = new SceneNode();
+    node->setName("Graph Node");
+    addSceneObjectTaActive(node);
+}
+
+void Scene::deletActive()
+{
+    QModelIndex parentIndex = activeIndex.parent();
+
+    SceneNode *parent  = static_cast<SceneNode*>(active->getParent());
+
+    int pos = active->childNumber();
+    //qDebug()<<"Delet Active in Scene"<<parentIndex<<parent->childCount()<<pos;
+    //foreach (SceneObject * t, parent->getChildren()) {
+     //   qDebug()<<t->getName()<<t->childNumber();
+    //}
+
+    beginRemoveRows(parentIndex, pos, pos);
+    parent->remove(pos);
+    endRemoveRows();
+    active = parent;
+    activeIndex = parentIndex;
+   // qDebug()<<"Delet Active in Scene"<<active<<activeIndex<<active->getName();
+
+    emit activChanged();
+
+}
+
+void Scene::setTesselation(int tesselation)
+{
+    this->tesselation = tesselation;
+}
+
+SceneObject *Scene::setActive(int id){
+    active = root->find(id);
+    emit activChanged();
+    return active;
+}
+
+SceneObject *Scene::getActive(){
+    return active;
+}
+
+void Scene::draw(QGLShaderProgram *shader)
+{
+    root->draw(shader);
+}
+
+SceneNode *Scene::getRoot()
+{
+    return root;
+}
+
+void Scene::moveActive(QVector3D dir)
+{
+
+    if(active != NULL){
+        active->move(dir);
+        //qDebug()<<"Move Active"<<active->getName()<<dir;
+    }
+
+}
+
+void Scene::rotateActive(QQuaternion rot)
+{
+    if(active != NULL)
+        active->rotate(rot);
+}
+
+//Model funktions
+SceneObject *Scene::getItem(const QModelIndex &index) const
+{
+    if (index.isValid()) {
+        SceneObject *item = static_cast<SceneObject*>(index.internalPointer());
+        if (item)
+            return item;
+    }
+    return root;
+}
+
+int Scene::rowCount(const QModelIndex &parent) const
+{
+    SceneObject *parentItem = getItem(parent);
+    // qDebug()<<"ChildCount:"<<parentItem->childCount();
+
+    return parentItem->childCount();
+}
+
+int Scene::columnCount(const QModelIndex & parent ) const
+{
+    SceneObject *item = getItem(parent);
+
+    // qDebug()<<"ColumnCount:"<<item->columnCount();
+    return item->columnCount();
+}
+
+Qt::ItemFlags Scene::flags(const QModelIndex &index) const
+{
+    if (!index.isValid())
+        return 0;
+
+    return Qt::ItemIsEditable | QAbstractItemModel::flags(index);
+}
+
+QModelIndex Scene::index(int row, int column, const QModelIndex &parent) const
+{
+    if (parent.isValid() && parent.column() != 0)
+        return QModelIndex();
+
+    SceneObject *parentItem = getItem(parent);
+
+    SceneObject *childItem = parentItem->children(row);
+    if (childItem)
+        return createIndex(row, column, childItem);
+    else
+        return QModelIndex();
+}
+
+QModelIndex Scene::parent(const QModelIndex &index) const
+{
+    if (!index.isValid())
+        return QModelIndex();
+
+    SceneObject *childItem = getItem(index);
+    SceneObject *parentItem = childItem->getParent();
+
+    if (parentItem == root)
+        return QModelIndex();
+
+    return createIndex(parentItem->childNumber(), 0, parentItem);
+}
+
+QVariant Scene::data(const QModelIndex &index, int role) const
+{
+    if (!index.isValid())
+        return QVariant();
+
+    if (role != Qt::DisplayRole && role != Qt::EditRole)
+        return QVariant();
+
+    SceneObject *item = getItem(index);
+
+    return item->data(index.column());
+}
+
+QVariant Scene::headerData(int section, Qt::Orientation orientation,
+                           int role) const
+{
+
+    if (orientation == Qt::Horizontal && role == Qt::DisplayRole)
+        return root->data(section);
+
+    return QVariant();
+}
+
+
+void Scene::objectSelected(QModelIndex index)
+{
+
+    activeIndex = index;
+    active = getItem(index);
+    emit activChanged();
+
+}
+

A4/scene.h

+#ifndef SCENE_H
+#define SCENE_H
+
+#include <QObject>
+#include <QtOpenGL>
+#include <QGLFunctions>
+#include <QOpenGLFunctions>
+#include <QFile>
+
+#include <scenenode.h>
+#include <sceneobject.h>
+#include <sceneprimitive.h>
+#include <scenevolume.h>
+
+class Scene: public QAbstractItemModel // QAbstractItemModel
+{
+    Q_OBJECT
+public:
+    Scene();
+    ~Scene();
+    void draw(QGLShaderProgram *shader);
+
+    int simpleScene();
+
+
+    void moveActive(QVector3D dir);
+    void rotateActive(QQuaternion rot);
+
+    void addSceneObjectTaActive(SceneObject *obj);
+    SceneObject *getActive();
+    SceneObject *setActive(int id);
+
+
+    QVariant data(const QModelIndex &index, int role) const Q_DECL_OVERRIDE;
+    QVariant headerData(int section, Qt::Orientation orientation,
+                        int role = Qt::DisplayRole) const Q_DECL_OVERRIDE;
+
+    QModelIndex index(int row, int column,
+                      const QModelIndex &parent = QModelIndex()) const Q_DECL_OVERRIDE;
+    QModelIndex parent(const QModelIndex &index) const Q_DECL_OVERRIDE;
+
+    int rowCount(const QModelIndex &parent = QModelIndex()) const Q_DECL_OVERRIDE;
+    int columnCount(const QModelIndex &parent = QModelIndex()) const Q_DECL_OVERRIDE;
+
+     Qt::ItemFlags flags(const QModelIndex &index) const Q_DECL_OVERRIDE;
+
+    int tesselation;
+
+public slots:
+    void objectSelected(QModelIndex index);
+    void setTesselation(int tesselation);
+    void addCube();
+    void addSphere();
+    void addCylinder();
+    void addTorus();
+    void addCone();
+    void addNode();
+    void deletActive();
+
+
+signals:
+    void activChanged();
+    void changedVolumeData(int width, int height, int depth, byte* data);
+
+private:
+    SceneNode *root;
+    SceneObject *active;
+    QModelIndex activeIndex;
+    SceneObject *getItem(const QModelIndex &index) const;
+
+
+    SceneNode *getRoot();
+
+
+};
+
+#endif // SCENE_H

A4/scenenode.cpp

+#include "scenenode.h"
+
+
+
+
+SceneNode::SceneNode()
+    :SceneObject()
+{
+    childs = QList<SceneObject*>();
+}
+
+SceneNode::~SceneNode()
+{
+    qDeleteAll(childs);
+}
+
+
+SceneObject *SceneNode::children(int number)
+{
+    return childs.value(number);
+}
+
+int SceneNode::childCount() const
+{
+    return childs.count();
+}
+
+
+
+void SceneNode::add(SceneObject *child)
+{
+    childs.append(child);
+}
+
+ void SceneNode::remove(int number)
+ {
+     delete childs.takeAt(number);
+ }
+
+SceneObject *SceneNode::find(int id)
+{
+    foreach (SceneObject *obj, childs) {
+        SceneObject *temp = obj->find(id);
+        if(temp != NULL)
+            return temp;
+    }
+
+    return NULL;
+
+}
+
+
+void SceneNode::draw(QGLShaderProgram *shader)
+{
+    glPushMatrix();
+    applyTransformation();
+    foreach (SceneObject *obj, childs) {
+        obj->draw(shader);
+    }
+
+    glPopMatrix();
+}

A4/scenenode.h

+#ifndef SCENENODE_H
+#define SCENENODE_H
+
+#include <sceneobject.h>
+#include <QList>
+
+class SceneNode : public SceneObject
+{
+    Q_OBJECT
+private:
+    QList<SceneObject*> childs;
+
+public:
+    SceneNode();
+    ~SceneNode();
+    SceneObject *children(int number);
+    int childCount() const;
+    QList<SceneObject*> getChildren(){return childs;}
+
+
+    virtual bool isNode(){return true;qDebug()<<"isNode";}
+
+    SceneObject *find(int id);
+    void draw(QGLShaderProgram *shader);
+    void add(SceneObject *child);
+    void remove(int number);
+
+};
+
+#endif // SCENENODE_H

A4/sceneobject.cpp

+#include "sceneobject.h"
+#include "scenenode.h"
+
+
+int SceneObject::idCount = 1;
+
+SceneObject::SceneObject()
+{
+    id = idCount;
+    idCount++;
+    name = QString("Scene Object "+id);
+    rotation = QQuaternion();
+    translation = QVector3D();
+    parent = NULL;
+}
+
+
+SceneObject *SceneObject::getParent()
+{
+    return parent;
+}
+
+SceneObject *SceneObject::children(int /* number*/)
+{
+    return NULL;
+}
+
+int SceneObject::childCount() const
+{
+    return 0;
+}
+
+int SceneObject::childNumber() const
+{
+    if (parent){
+        SceneNode* node = static_cast<SceneNode*>(parent);
+        return node->getChildren().indexOf(const_cast<SceneObject*>(this));
+    }
+     return 0;
+}
+
+int SceneObject::columnCount() const
+{
+    return 1+itemData.count();
+}
+
+QVariant SceneObject::data(int column) const
+{
+    if(column == 0) return name;
+
+    return itemData.value(column);
+}
+
+bool SceneObject::setData(int column, const QVariant &value)
+{
+     qDebug()<<"Set Data called";
+    if (column < 0 || column >= itemData.size())
+        return false;
+
+    if(column == 0) setName(value.toString());
+    else itemData[column] = value;
+    return true;
+}
+
+
+
+
+
+int SceneObject::getID(){return id;}
+
+QString SceneObject::getName(){return name;}
+
+QQuaternion SceneObject::getGlobalRotation(){
+    if(parent == NULL)
+        return QQuaternion();
+    else
+        return parent->getGlobalRotation() *rotation;
+}
+
+
+void SceneObject::move(QVector3D dir)
+{
+    QQuaternion rot = parent->getGlobalRotation();
+    translation+=rot.conjugate().rotatedVector(dir);
+}
+
+void SceneObject::rotate(QQuaternion rot)
+{
+
+    rotation = rot * rotation;
+
+
+}
+
+void SceneObject::draw(QGLShaderProgram *shader){qDebug()<<"Drawing abstract Scene Element";}
+
+SceneObject *SceneObject::find(int id)
+{
+   if(this->id == id){
+       return this;
+   } else{
+       return NULL;
+   }
+
+}
+
+
+ void SceneObject::applyTransformation()
+ {
+     QMatrix4x4 mat = QMatrix4x4();
+     mat.translate(translation);
+     glMultMatrixf(mat.data());
+
+     mat = QMatrix4x4();
+     mat.rotate(rotation);
+     glMultMatrixf(mat.data());
+ }

A4/sceneobject.h

+#ifndef SCENEOBJECT_H
+#define SCENEOBJECT_H
+
+#include <QObject>
+#include <QQuaternion>
+#include <QVector3D>
+#include <QVector>
+#include <QtOpenGL>
+#include <gl/GLU.h>
+
+class SceneObject : public QObject
+{
+    Q_OBJECT
+
+    static int idCount;
+protected:
+    QQuaternion rotation;
+    QVector3D translation;
+    int id;
+    QString name;
+    void applyTransformation();
+
+    QVector<QVariant> itemData;
+
+    SceneObject *parent;
+
+public:
+    SceneObject();
+
+    void setParent(SceneObject *parent){this->parent = parent;}
+    SceneObject *getParent();
+    virtual SceneObject *children(int number);
+
+    virtual bool isNode(){return false;}
+
+    int childNumber() const;
+    virtual int childCount() const;
+    int columnCount() const;
+    QVariant data(int column) const;
+    bool setData(int column, const QVariant &value);
+
+    virtual void draw(QGLShaderProgram *shader);
+    virtual SceneObject *find(int id);
+    int getID();
+    QString getName();
+    void setName(QString name){this->name = name;}
+    void move(QVector3D dir);
+    void rotate(QQuaternion rot);
+
+    QQuaternion getGlobalRotation();
+
+};
+
+#endif // SCENEOBJECT_H

A4/sceneprimitive.cpp

+#include "sceneprimitive.h"
+#include "algorithm"
+
+
+int ScenePrimitive::quaderCount = 1;
+int ScenePrimitive::sphereCount = 1;
+int ScenePrimitive::cylinderCount = 1;
+int ScenePrimitive::torusCount = 1;
+int ScenePrimitive::coneCount = 1;
+
+
+ScenePrimitive::ScenePrimitive(PrimitiveType type, int tesselation)
+    :SceneObject()
+{
+    this->type = type;
+    this->tesselation = tesselation;
+
+    qobj = gluNewQuadric();
+    gluQuadricNormals(qobj, GLU_SMOOTH);
+
+    this->color = new float[3];
+    this->color[0] = 0.0;
+    this->color[1] = 0.0;
+    this->color[2] = 0.0;
+
+    switch (this->type) {
+    case Quader:
+         name = QString("Quader %1").arg(ScenePrimitive::quaderCount);
+         ScenePrimitive::quaderCount++;
+         this->tesselation = pow(2,tesselation);
+        break;
+    case Sphere:
+        name = QString("Sphere %1").arg(ScenePrimitive::sphereCount);
+        ScenePrimitive::sphereCount++;
+        this->tesselation = 5*pow(2,tesselation);
+        break;
+    case Cylinder:
+        name = QString("Cylinder %1").arg(ScenePrimitive::cylinderCount);
+        ScenePrimitive::cylinderCount++;
+        this->tesselation = 5*pow(2,tesselation);
+        break;
+    case Torus:
+        name = QString("Torus %1").arg(ScenePrimitive::torusCount);
+        ScenePrimitive::torusCount++;
+        this->tesselation = 5*pow(2,tesselation);
+        break;
+    case Cone:
+        name = QString("Cone %1").arg(ScenePrimitive::coneCount);
+        ScenePrimitive::coneCount++;
+        this->tesselation = 5*pow(2,tesselation);
+        break;
+    default:
+        qDebug()<<"Enum Error";
+        break;
+    }
+ //   qDebug()<<"Tesselation"<<this->tesselation<<getName();
+}
+
+void ScenePrimitive::draw(QGLShaderProgram *shader){
+    shader->setAttributeValue(4,getID());
+    glPushMatrix();
+    applyTransformation();
+//    qDebug()<<this->getName()<<"Matrial"<<*color<<"Trans"<<translation<<"Rot"<<rotation;
+    glMaterialfv(GL_FRONT,GL_AMBIENT,color);
+    GLfloat white[] = {1.0,1.0,1.0};
+    glMaterialfv(GL_FRONT,GL_DIFFUSE,color);
+    glMaterialfv(GL_FRONT,GL_SPECULAR,white);
+
+    GLfloat mShininess[] = {128};
+    glMaterialfv(GL_FRONT,GL_SHININESS,mShininess);
+
+    int radius = 1;
+
+    switch (this->type) {
+    case Quader:
+        drawCube(tesselation);
+        break;
+    case Sphere:
+        gluSphere(qobj,1,tesselation,tesselation);
+        break;
+    case Cylinder:
+
+        gluCylinder(qobj,radius,radius,3,tesselation,tesselation);
+        gluQuadricOrientation(qobj,GLU_INSIDE);
+        gluDisk( qobj, 0.0, radius, tesselation, 1);
+        glTranslatef(0,0,3);
+        gluQuadricOrientation(qobj,GLU_OUTSIDE);
+        gluDisk( qobj, 0.0 , radius, tesselation, 1);
+        break;
+    case Cone:
+        gluQuadricOrientation(qobj,GLU_OUTSIDE);
+        gluCylinder(qobj,radius,0,3,tesselation,tesselation);
+        gluQuadricOrientation(qobj,GLU_INSIDE);
+        gluDisk( qobj, 0.0, radius, tesselation, 1);
+        break;
+    case Torus:
+        glutSolidTorus(1, 2, tesselation, tesselation);
+        break;
+    default:
+        qDebug()<<"Enum Error";
+        break;
+    }
+
+
+    glPopMatrix();
+}
+
+void ScenePrimitive::setMaterial(float *color )
+{
+
+
+    this->color = new float[3];
+    this->color[0] = color[0];
+    this->color[1] = color[1];
+    this->color[2] = color[2];
+   // qDebug()<< *this->color<<" "<<this->color[0]<<" "<<this->color[1]<<" "<<this->color[2];
+
+}
+
+
+void ScenePrimitive::drawCube(int tesselation)
+{
+    float increment = 1.0/tesselation;
+
+    glBegin(GL_QUADS);
+    glNormal3f(0,1,0);
+    for (float x = -0.5; x < 0.5 ; x+= increment) {
+        for (float y = -0.5; y < 0.5 ; y+= increment ) {
+            glVertex3f( x+increment, 0.5f,y);
+            glVertex3f(x, 0.5f,y);
+            glVertex3f(x, 0.5f, y+increment);
+            glVertex3f( x+increment, 0.5f, y+increment);
+        }
+    }
+    glEnd();
+
+    glBegin(GL_QUADS);
+    glNormal3f(0,-1,0);
+    for (float x = -0.5; x < 0.5 ; x+= increment) {
+        for (float y = -0.5; y < 0.5 ; y+= increment ) {
+            glVertex3f( x+increment, -0.5f,y+increment);
+            glVertex3f(x, -0.5f,y+increment);
+            glVertex3f(x, -0.5f, y);
+            glVertex3f( x+increment, -0.5f, y);
+        }
+    }
+    glEnd();
+
+    glBegin(GL_QUADS);
+    glNormal3f(0,0,1);
+    for (float x = -0.5; x < 0.5 ; x+= increment) {
+        for (float y = -0.5; y < 0.5 ; y+= increment ) {
+            glVertex3f( x+increment,y+increment, 0.5f);
+            glVertex3f(x, y+increment, 0.5f);
+            glVertex3f(x,  y, 0.5f);
+            glVertex3f( x+increment, y, 0.5f);
+        }
+    }
+    glEnd();
+
+    glBegin(GL_QUADS);
+    glNormal3f(0,0,-1);
+    for (float x = -0.5; x < 0.5 ; x+= increment) {
+        for (float y = -0.5; y < 0.5 ; y+= increment ) {
+            glVertex3f( x+increment,y, -0.5f);
+            glVertex3f(x, y,-0.5f);
+            glVertex3f(x, y+increment,-0.5f);
+            glVertex3f( x+increment,y+increment, -0.5f);
+        }
+    }
+    glEnd();
+
+    glBegin(GL_QUADS);
+    glNormal3f(-1,0,0);
+    for (float x = -0.5; x < 0.5 ; x+= increment) {
+        for (float y = -0.5; y < 0.5 ; y+= increment ) {
+            glVertex3f( -0.5f, x+increment,y+increment);
+            glVertex3f( -0.5f,x+increment,y);
+            glVertex3f( -0.5f,x, y);
+            glVertex3f(  -0.5f,x, y+increment);
+        }
+    }
+    glEnd();
+
+    glBegin(GL_QUADS);
+    glNormal3f(1,0,0);
+    for (float x = -0.5; x < 0.5 ; x+= increment) {
+        for (float y = -0.5; y < 0.5 ; y+= increment ) {
+            glVertex3f( 0.5f, x+increment,y);
+            glVertex3f( 0.5f,x+increment,y+increment);
+            glVertex3f( 0.5f,x, y+increment);
+            glVertex3f(  0.5f,x, y);
+        }
+    }
+    glEnd();
+}
+

A4/sceneprimitive.h

+#ifndef SCENEPRIMITIVE_H
+#define SCENEPRIMITIVE_H
+
+#include <sceneobject.h>
+#include <glut.h>
+
+enum PrimitiveType{Quader=0,Sphere,Cylinder,Torus,Cone};
+
+class ScenePrimitive : public SceneObject
+{
+   Q_OBJECT
+private:
+    static int quaderCount;
+    static int sphereCount;
+    static int cylinderCount ;
+    static int torusCount;
+     static int coneCount;
+
+    PrimitiveType type;
+    int tesselation;
+    GLUquadric *qobj;
+    float *color;
+
+    void drawCube(int tesselation);
+
+public:
+
+
+    void draw(QGLShaderProgram *shader);
+
+
+    void setMaterial(float *color);
+    ScenePrimitive(PrimitiveType type, int tesselation);
+};
+
+#endif // SCENEPRIMITIVE_H

A4/scenevolume.cpp

+#include "scenevolume.h"
+
+SceneVolume::SceneVolume(int width,int height, int depth, double dx, double dy, double dz)
+{
+    this->width = width;
+    this->height = height;
+    this->depth = depth;
+
+    this->dx = dx;
+    this->dy = dy;
+    this->dz = dz;
+
+    lx = width*dx;
+    ly = height*dy;
+    lz = depth*dz;
+
+    qDebug()<<lx<<ly<<lz;
+
+    double max = qMax(lx,qMax(ly,lz));
+
+
+
+    lx = lx/max;
+    ly = ly/max;
+    lz = lz/max;
+
+    qDebug()<<max<<lx<<ly<<lz;
+
+    this->setName("Volume");
+
+}
+
+
+void SceneVolume::draw(QGLShaderProgram *shader){
+    glPushMatrix();
+    applyTransformation();
+
+    shader->setUniformValue("volume", true);
+
+    QMatrix4x4 mat = QMatrix4x4();
+    mat.rotate(getGlobalRotation().conjugate());
+    glMultMatrixf(mat.data());
+
+ //   shader->setUniformValue("volumeRot",mat);
+
+    glDisable(GL_DEPTH_TEST);
+    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+    glEnable( GL_BLEND );
+
+    float x = lx/2;
+    float y = ly/2;
+    float z = lz/2;
+
+    glBegin(GL_QUADS);
+    glNormal3f(0,1,0);
+    glTexCoord3i(1,1,0);
+    glVertex3f(  x,  y, -z);
+    glTexCoord3i(0,1,0);
+    glVertex3f( -x,  y, -z);
+    glTexCoord3i(0,1,1);
+    glVertex3f( -x,  y,  z);
+    glTexCoord3i(1,1,1);
+    glVertex3f(  x,  y,  z);
+    glEnd();
+
+    glBegin(GL_QUADS);
+    glNormal3f(0,-1,0);
+    glTexCoord3i(1,0,1);
+    glVertex3f(  x,  -y,  z);
+    glTexCoord3i(0,0,1);
+    glVertex3f( -x,  -y,  z);
+    glTexCoord3i(0,0,0);
+    glVertex3f( -x,  -y, -z);
+    glTexCoord3i(1,0,0);
+    glVertex3f(  x,  -y, -z);
+    glEnd();
+
+    glBegin(GL_QUADS);
+    glNormal3f(0,0,1);
+    glTexCoord3i(1,1,1);
+    glVertex3f(  x,  y,  z);
+    glTexCoord3i(0,1,1);
+    glVertex3f( -x,  y,  z);
+    glTexCoord3i(0,0,1);
+    glVertex3f( -x,  -y,  z);
+    glTexCoord3i(1,0,1);
+    glVertex3f(  x,  -y,  z);
+    glEnd();
+
+    glBegin(GL_QUADS);
+    glNormal3f(0,0,-1);
+    glTexCoord3i(1,0,0);
+    glVertex3f(  x,  -y,  -z);
+    glTexCoord3i(0,0,0);
+    glVertex3f( -x,  -y,  -z);
+    glTexCoord3i(0,1,0);
+    glVertex3f( -x,  y,  -z);
+    glTexCoord3i(1,1,0);
+    glVertex3f(  x,  y,  -z);
+    glEnd();
+
+    glBegin(GL_QUADS);
+    glNormal3f(-1,0,0);
+    glTexCoord3i(0,1,1);
+    glVertex3f(  -x,  y,  z);
+    glTexCoord3i(0,1,0);
+    glVertex3f( -x,  y,  -z);
+    glTexCoord3i(0,0,0);
+    glVertex3f( -x,  -y,  -z);
+    glTexCoord3i(0,0,1);
+    glVertex3f(  -x,  -y,  z);
+    glEnd();
+
+    glBegin(GL_QUADS);
+    glNormal3f(1,0,0);
+    glTexCoord3i(1,1,0);
+    glVertex3f(  x,  y,  -z);
+    glTexCoord3i(1,1,1);
+    glVertex3f( x,  y,  z);
+    glTexCoord3i(1,0,1);
+    glVertex3f( x,  -y,  z);
+    glTexCoord3i(1,0,0);
+    glVertex3f(  x,  -y,  -z);
+    glEnd();
+
+    shader->setUniformValue("volume", false);
+    shader->setUniformValue("shaded", false);
+    glLineWidth(2);
+    if(true){
+        glBegin(GL_LINES);
+        glVertex3f(  x,  y, -z);
+        glVertex3f(  x,  y, z);
+        glVertex3f(  -x,  y, -z);
+        glVertex3f(  -x,  y, z);
+        glVertex3f(  x,  -y, -z);
+        glVertex3f(  x,  -y, z);
+        glVertex3f(  -x,  -y, -z);
+        glVertex3f(  -x,  -y, z);
+
+        glVertex3f(  x,  -y, z);
+        glVertex3f(  x,  y, z);
+        glVertex3f(  -x,  -y, z);
+        glVertex3f(  -x,  y, z);
+        glVertex3f(  x,  -y, -z);
+        glVertex3f(  x,  y, -z);
+        glVertex3f(  -x,  -y, -z);
+        glVertex3f(  -x,  y, -z);
+
+        glVertex3f(  -x,  y, z);
+        glVertex3f(  x,  y, z);
+        glVertex3f(  -x,  -y, z);
+        glVertex3f(  x,  -y, z);
+        glVertex3f(  -x,  y, -z);
+        glVertex3f(  x,  y, -z);
+        glVertex3f(  -x,  -y, -z);
+        glVertex3f(  x,  -y, -z);
+        glEnd();
+
+    }
+    shader->setUniformValue("shaded", true);
+
+     glEnable(GL_DEPTH_TEST);
+     glDisable( GL_BLEND );
+
+    glPopMatrix();
+
+
+
+
+}

A4/scenevolume.h

+#ifndef SCENEVOLUME_H
+#define SCENEVOLUME_H
+
+#include <QObject>
+#include <sceneobject.h>
+
+class SceneVolume : public SceneObject
+{
+
+private:
+    double lx,ly,lz;
+    double dx,dy,dz;
+    int width,height,depth;
+public:
+    SceneVolume(int width,int height, int depth, double dx, double dy, double dz);
+    void draw(QGLShaderProgram *shader);
+};
+
+#endif // SCENEVOLUME_H

A4/transferfunctioneditor.cpp

+#include "transferfunctioneditor.h"
+
+TransferFunctionEditor::TransferFunctionEditor(QWidget *parent) :
+    QWidget(parent)
+{
+
+    histogram = new int[256];
+
+    for(int i = 0; i < 256; i++)
+    {
+        histogram[i] = 0;
+    }
+    histoMax = 1;
+
+
+
+    this->setFixedSize(256,256);
+
+    red = true;
+    green = true;
+    blue = true;
+    alpha = true;
+
+    temp = 3;
+
+    trans = new uchar[4*256];
+    this->reset();
+
+}
+
+void TransferFunctionEditor::setHistogram(int *his){
+    histogram = his;
+
+    histoMax = 0;
+    for(int i = 0; i < 256; i++)
+    {
+
+        histoMax = qMax(histoMax,histogram[i]);
+    }
+}
+
+void TransferFunctionEditor::setTransferFunction(uchar *trans){
+    this->trans = trans;
+}
+
+
+uchar* TransferFunctionEditor::getTransferFunctin(){
+    return trans;
+}
+
+
+TransferFunctionEditor::~TransferFunctionEditor()
+{
+
+}
+
+
+void TransferFunctionEditor::paintEvent(QPaintEvent *event){
+    QPainter painter(this);
+
+    QPen pen(QColor(100,100,100,100));
+
+    for(int i = 0; i < 256; i++)
+    {
+        painter.setPen(pen);
+        int top = histogram[i]*256/histoMax;
+        //qDebug()<<i<<top;
+        painter.drawLine(i,256,i,256-top);
+    }
+
+    if(red){
+        pen = QPen(QColor(255,0,0,255));
+        painter.setPen(pen);
+        for(int i = 0; i < 4*255; i+=4){
+            painter.drawLine(i/4,256-trans[i],i/4+1,256-trans[i+4]);
+        }
+    }
+
+    if(green){
+        pen = QPen(QColor(0,255,0,255));
+        painter.setPen(pen);
+        for(int i = 1; i < 4*255; i+=4){
+            painter.drawLine(i/4,256-trans[i],i/4+1,256-trans[i+4]);
+        }
+    }
+
+    if(blue){
+        pen = QPen(QColor(0,0,255,255));
+        painter.setPen(pen);
+        for(int i = 2; i < 4*255; i+=4){
+            painter.drawLine(i/4,256-trans[i],i/4+1,256-trans[i+4]);
+        }
+    }
+
+    if(alpha){
+        pen = QPen(QColor(0,0,0,255));
+        painter.setPen(pen);
+        for(int i = 3; i < 4*255; i+=4){
+            painter.drawLine(i/4,256-trans[i],i/4+1,256-trans[i+4]);
+        }
+    }
+
+}
+
+void TransferFunctionEditor::paintRed(bool paint){
+    this->red =paint;
+    this->repaint();
+}
+
+void TransferFunctionEditor::paintGreen(bool paint){
+    this->green =paint;
+    this->repaint();
+}
+void TransferFunctionEditor::paintBlue(bool paint){
+    this->blue =paint;
+    this->repaint();
+}
+void TransferFunctionEditor::paintAlpha(bool paint){
+    this->alpha =paint;
+    this->repaint();
+}
+
+
+void TransferFunctionEditor::save(){
+    QString fn = QFileDialog::getSaveFileName(NULL, tr("Save Transfer Function..."),
+                                              QString("D:\\Projekte\\GraPa\\A3"), tr("TransferFunction (*.tf )"));
+    if(fn.isEmpty())
+        return;
+    qDebug()<<"Save"<< fn;
+
+    QFile file(fn);
+    if(!file.open(QIODevice::WriteOnly)) {
+        QMessageBox::information(0, "error", file.errorString());
+    }
+    qDebug()<<*(trans+5);
+    file.write((char*)this->trans,4*256);
+    file.close();
+}
+
+void TransferFunctionEditor::load(){
+    QString fn = QFileDialog::getOpenFileName(NULL, tr("Open Transfer Function..."),
+                                              QString("D:\\Projekte\\GraPa\\A3"), tr("TransferFunction (*.tf )"));
+    if(fn.isEmpty())
+        return;
+    qDebug()<<"Open"<< fn;
+
+    QFile file(fn);
+    if(!file.open(QIODevice::ReadOnly)) {
+        QMessageBox::information(0, "error", file.errorString());
+    }
+    QByteArray data = file.readAll();
+   // trans = reinterpret_cast<uchar*>(data.data());
+
+    for(int i = 0; i < 4*256; i+=1){
+        trans[i] = data.at(i);
+    }
+
+    file.close();
+
+    emit dataChanged(trans);
+    this->repaint();
+}
+void TransferFunctionEditor::reset(){
+
+    for(int i = 0; i < 256; i+=1){
+        int index = i*4;
+        if(red) trans[index] = i;
+        if(green) trans[index+1] = i;
+        if(blue)trans[index+2] = i;
+        if(alpha) trans[index+3] = i;
+    }
+    emit dataChanged(trans);
+    this->repaint();
+    qDebug()<<"reset";
+}
+void TransferFunctionEditor::smooth(){
+    uchar* smothed = new uchar[4*256];
+
+    qDebug()<<"smooth";
+
+
+    for(int i = 0; i < 1024; i++){
+        if(i < 1020 && (red && i % 4 == 0
+                        ||green && i % 4 == 1
+                        ||blue && i % 4 == 2
+                        ||alpha && i % 4 == 3)){
+            int im2=i-2*4;
+            for(;im2<0;im2+=4);
+
+            int im1=i-4;
+            for(;im1<0;im1+=4);
+
+            int ip1=i+4;//1020
+            for(;ip1>1023;ip1-=4);
+
+            int ip2=i+2*4;
+            for(;ip2>1023;ip2-=4);
+
+            //            if(i % 4 == 0) qDebug()<<"r"<<im2<<im1<<i<<ip1<<ip2;
+            //            if(i % 4 == 1) qDebug()<<"g"<<im2<<im1<<i<<ip1<<ip2;
+            //            if(i % 4 == 2) qDebug()<<"b"<<im2<<im1<<i<<ip1<<ip2;
+            //            if(i % 4 == 3) qDebug()<<"a"<<im2<<im1<<i<<ip1<<ip2;
+
+            smothed[i] = (trans[im2]+2*trans[im1]+4*trans[i]+2*trans[ip1]+trans[ip2])/10;
+            //qDebug()<<trans[i]<<"->"<<smothed[i];
+        } else{
+            smothed[i] = trans[i];
+        }
+
+    }
+
+    trans = smothed;
+    emit dataChanged(trans);
+    this->repaint();
+}
+
+void TransferFunctionEditor::mousePressEvent(QMouseEvent *event ){
+    // qDebug()<<event->pos().x()<< event->pos().y();
+    int value = 255 - event->pos().y();
+    if(red){
+        trans[event->pos().x()*4] = value;
+    }
+    if(green){
+        trans[event->pos().x()*4+1] = value;
+    }
+    if(blue){
+        trans[event->pos().x()*4+2] = value;
+    }
+    if(alpha){
+        trans[event->pos().x()*4+3] = value;
+    }
+
+
+    for(int i = 1; i < 10; i++){
+        float step = 1.0/pow(1.1,i);
+        if(red){
+            int pos = event->pos().x()*4;
+            trans[pos + 4*i ] = trans[pos + 4*i]+ (value- trans[pos + 4*i])*step;
+            trans[pos - 4*i ] = trans[pos - 4*i]+ (value- trans[pos - 4*i])*step;
+        }
+        if(green){
+            int pos = event->pos().x()*4+1;
+            trans[pos + 4*i ] = trans[pos + 4*i]+ (value- trans[pos + 4*i])*step;
+            trans[pos - 4*i ] = trans[pos - 4*i]+ (value- trans[pos - 4*i])*step;
+        }
+        if(blue){
+            int pos = event->pos().x()*4+2;
+            trans[pos + 4*i ] = trans[pos + 4*i]+ (value- trans[pos + 4*i])*step;
+            trans[pos - 4*i ] = trans[pos - 4*i]+ (value- trans[pos - 4*i])*step;
+        }
+        if(alpha){
+            int pos = event->pos().x()*4+3;
+            trans[pos + 4*i ] = trans[pos + 4*i]+ (value- trans[pos + 4*i])*step;
+            trans[pos - 4*i ] = trans[pos - 4*i]+ (value- trans[pos - 4*i])*step;
+        }
+    }
+    emit dataChanged(trans);
+    this->repaint();
+
+}

A4/transferfunctioneditor.h

+#ifndef TRANSFERFUNCTIONEDITOR_H
+#define TRANSFERFUNCTIONEDITOR_H
+
+#include <QWidget>
+#include <QPainter>
+#include <QDebug>
+#include <QFileDialog>
+#include <QtGui>
+#include <QObject>
+#include <QMessageBox>
+
+class TransferFunctionEditor : public QWidget
+{
+    Q_OBJECT
+
+public:
+    TransferFunctionEditor(QWidget *parent = 0);
+    ~TransferFunctionEditor();
+
+    void setHistogram(int *histogram);
+    void setTransferFunction(uchar *trans);
+    uchar* getTransferFunctin();
+
+     void mousePressEvent(QMouseEvent *event ) ;
+
+public slots:
+    void paintRed(bool paint);
+    void paintGreen(bool paint);
+    void paintBlue(bool paint);
+    void paintAlpha(bool paint);
+
+    void save();
+    void load();
+    void reset();
+    void smooth();
+
+signals:
+    void dataChanged(uchar* function);
+
+protected:
+    void paintEvent(QPaintEvent *event);
+
+private:
+    uchar *trans;
+    int *histogram;
+
+    int histoMax;
+
+    bool red;
+    bool green;
+    bool blue;
+    bool alpha;
+
+    int temp = 0;
+};
+
+#endif // TRANSFERFUNCTIONEDITOR_H

A4/treedelegate.cpp

+#include "treedelegate.h"
+#include <QDebug>
+#include <QLineEdit>
+#include <QString>
+#include <scene.h>
+
+TreeDelegate::TreeDelegate()
+{
+
+}
+
+void TreeDelegate::setModelData(QWidget *editor, QAbstractItemModel  *model,
+                                const QModelIndex &index) const
+{
+    qDebug()<<"out";
+    QLineEdit *lineEdit = qobject_cast<QLineEdit *>(editor);
+    if (!lineEdit->isModified()) {
+        return;
+    }
+    QString text = lineEdit->text();
+    text = text.trimmed();
+    if (text.isEmpty()) {
+        // If text is empty, do nothing - preserve the old value.
+        return;
+    } else {
+        if (index.isValid()) {
+            SceneObject *item = static_cast<SceneObject*>(index.internalPointer());
+            if (item)
+                item->setName(text);
+        }
+        emit nameChanged();
+    }
+}
+

A4/treedelegate.h

+#ifndef TREEDELEGATE_H
+#define TREEDELEGATE_H
+
+#include <QItemDelegate>
+
+class TreeDelegate : public QItemDelegate
+{
+        Q_OBJECT;
+public:
+    TreeDelegate();
+    void setModelData(QWidget *editor, QAbstractItemModel *model,
+                          const QModelIndex &index) const;
+signals:
+    void nameChanged() const;
+};
+
+#endif // TREEDELEGATE_H