for Desktop

A1/hellocube/cubewidget.cpp

@@ -23,6 +23,7 @@ void CubeWidget::initializeGL ()
 
     tesselation = 0;
     // enable default shading
+    home();
     showFlat();
 
     glEnable(GL_LIGHTING);
@@ -42,9 +43,11 @@ void CubeWidget::paintGL ( )
 {
     glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
     glLoadIdentity();
-    glTranslatef(0.0f,0.0f,-3.0f);
-    glRotated(45,1,0,0);
-    glRotated(45,0,1,0);
+    glTranslatef(0.0f,0.0f,-zoom);
+    QMatrix4x4 mat = QMatrix4x4();
+    mat.rotate(*rotation);
+    glMultMatrixf(mat.data());
+
 
 
     GLfloat red[] = {1.0,0.0,0.0};
@@ -67,12 +70,7 @@ void CubeWidget::paintGL ( )
         }
     }
 
-
     setMaterial(magenta);
-    glVertex3f( 0.5f,-0.5f, 0.5f);
-    glVertex3f(-0.5f,-0.5f, 0.5f);
-    glVertex3f(-0.5f,-0.5f,-0.5f);
-    glVertex3f( 0.5f,-0.5f,-0.5f);
     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);
@@ -132,7 +130,7 @@ void CubeWidget::resizeGL(int width , int height )
     glViewport(0, 0, width, height);
 
     glLoadIdentity();
-    perspective(45.0,1.0*width/height,0.01,5.0);
+    perspective(45.0,1.0*width/height,0.01,100.0);
 
     glMatrixMode(GL_MODELVIEW);
 }
@@ -193,6 +191,29 @@ void CubeWidget::setTessellation(int t)
     qDebug()<<"Tesselation" << t;
 }
 
-void CubeWidget::mousePressEvent(QMouseEvent *event ) {}
-void CubeWidget::mouseMoveEvent(QMouseEvent *event ) {}
-void CubeWidget::wheelEvent(QWheelEvent *event ) {}
+void CubeWidget::home()
+{
+    zoom = 3;
+    rotation = new QQuaternion();
+    updateGL();
+}
+
+void CubeWidget::mousePressEvent(QMouseEvent *event )
+{
+
+}
+
+void CubeWidget::mouseMoveEvent(QMouseEvent *event )
+{
+    //http://web.cse.ohio-state.edu/~hwshen/781/Site/Slides_files/trackball.pdf
+}
+
+void CubeWidget::wheelEvent(QWheelEvent *event )
+{
+    if(event->delta()<0)
+        zoom++;
+    else
+        zoom--;
+
+    updateGL();
+}

A1/hellocube/cubewidget.h

@@ -6,6 +6,8 @@
 #include <QGLFunctions>
 #include <QOpenGLFunctions>
 #include <math.h>
+#include <QMatrix4x4>
+#include <QQuaternion>
 
 
 
@@ -31,11 +33,15 @@ public slots:
     void showFlat();
     void showGouraut();
     void showPhong();
+    void home();
 
     void setTessellation(int t );
 
 private:
     int tesselation;
+    int zoom;
+    QQuaternion *rotation;
+    QPoint *lastPos;
     void perspective(GLdouble fovy, GLdouble aspect, GLdouble zNear, GLdouble zFar);
     void setMaterial(GLfloat *color );
 };

A1/hellocube/mainwindow.cpp

@@ -60,6 +60,7 @@ MainWindow::MainWindow(QWidget *parent)
     connect(aboutAction,SIGNAL(triggered()),this,SLOT(showAboutBox()));
 
     camHome = new QAction(QIcon(":/img/cam_home.png"),"Cam Home", toolBar);
+    connect(camHome, SIGNAL(triggered(bool)),mainWidget,SLOT(home()));
 
     slider = new QSlider(Qt::Horizontal,toolBar);
     slider->setMinimum( 0 );