addet translation

A1/hellocube/cubewidget.cpp

@@ -72,7 +72,7 @@ void CubeWidget::paintGL ( )
     glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
     glLoadIdentity();
 
-    glTranslatef(0.0f,0.0f,-zoom);
+    glMultMatrixf(translation->data());
 
     QMatrix4x4 mat = QMatrix4x4();
     mat.rotate(*rotation);
@@ -238,49 +238,35 @@ void CubeWidget::setTessellation(int t)
 
 void CubeWidget::home()
 {
-    zoom = 3;
+    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();
 
-    // if (event->isAccepted())
-    //     return;
-
-    if (event->buttons() & Qt::LeftButton) {
-        lastPos = trackballPoint(event->pos().x(),event->pos().y());
-
-
-        event->accept();
-    } else {
-    }
 
 }
 
 void CubeWidget::mouseMoveEvent(QMouseEvent *event )
 {
-
-    //http://web.cse.ohio-state.edu/~hwshen/781/Site/Slides_files/trackball.pdf
-    //http://doc.qt.io/qt-5/qtwidgets-graphicsview-boxes-example.html
-
-    // if (event->isAccepted())
-    //    return;
-
     if (event->buttons() & Qt::LeftButton) {
-        move(trackballPoint(event->pos().x(),event->pos().y()));
-
-        //m_trackBalls[0].move(pixelPosToViewPos(event->scenePos()), m_trackBalls[2].rotation().conjugate());
+        rotate(trackballPoint(event->pos().x(),event->pos().y()));
+        event->accept();
+    } else  if (event->buttons() & Qt::RightButton) {
+        move(new QPointF(event->screenPos()));
         event->accept();
-    } else {
-        //m_trackBalls[0].release(pixelPosToViewPos(event->scenePos()), m_trackBalls[2].rotation().conjugate());
     }
 }
 
-void CubeWidget::move(QVector3D *newPos )
+void CubeWidget::rotate(QVector3D *newPos )
 {
-    QVector3D axis = QVector3D::crossProduct(*lastPos,*newPos);
+    QVector3D axis = QVector3D::crossProduct(*lastSpeherePos,*newPos);
 
     //warum so besser
     float angle = 180 / M_PI * asin(sqrt(QVector3D::dotProduct(axis, axis)));
@@ -290,15 +276,29 @@ void CubeWidget::move(QVector3D *newPos )
     QQuaternion newRot = QQuaternion::fromAxisAndAngle(axis, angle) * *rotation;
     rotation = new QQuaternion(newRot.toVector4D());
 
-    lastPos = newPos;
+    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;
+    // qDebug()<<"x:"<< x << " y:"<<y;
     xo = ((2.0*x)-width())/ height();
     yo = (height()-(2.0*y))/width();
 
@@ -309,16 +309,17 @@ QVector3D* CubeWidget::trackballPoint(int x, int y){
 
     QVector3D *pos = new QVector3D(xo,yo,zo);
     pos->normalize();
-  //  qDebug()<<"x:"<< xo << " y:"<<yo<<" z:"<<zo;
+    //  qDebug()<<"x:"<< xo << " y:"<<yo<<" z:"<<zo;
     return pos;
 }
 
 void CubeWidget::wheelEvent(QWheelEvent *event )
 {
     if(event->delta()<0)
-        zoom++;
+        //TODO
+        translation->translate(0.0,0.0,1.0);
     else
-        zoom--;
+        translation->translate(0.0,0.0,-1.0);
 
     updateGL();
 }

A1/hellocube/cubewidget.h

@@ -42,8 +42,12 @@ public slots:
 private:
     int tesselation;
     int zoom;
+
+    QVector3D *lastSpeherePos;
+    QPointF * lastScreenPos;
+
     QQuaternion *rotation;
-    QVector3D *lastPos;
+    QMatrix4x4 * translation;
 
     QGLShaderProgram *shader;
 
@@ -51,7 +55,8 @@ private:
 
     void perspective(GLdouble fovy, GLdouble aspect, GLdouble zNear, GLdouble zFar);
     void setMaterial(GLfloat *color );
-    void move(QVector3D *newPos );
+    void rotate(QVector3D *newPos );
+    void move(QPointF *newPos );
     QVector3D *trackballPoint(int x, int y);
 };