Added a Cube

.gitignore

+/A1/build-hellocube-Desktop_Qt_5_4_2_MSVC2013_OpenGL_64bit-Debug
+/A1/hellocube/*.user

A1/hellocube/cubewidget.cpp

@@ -20,22 +20,92 @@ QSize CubeWidget::sizeHint() const
 
 void CubeWidget::initializeGL ()
 {
-
+    glClearColor(0.0, 0.0, 0.0, 0.0);
     glEnable(GL_DEPTH_TEST);
-/*    glEnable(GL_CULL_FACE);
-    glShadeModel(GL_SMOOTH);
-    glEnable(GL_MULTISAMPLE);
-    glEnable(GL_LIGHTING);
+   glEnable(GL_CULL_FACE);
+
+
+    // enable default shading
+    glShadeModel(GL_FLAT);
+
+   // glEnable(GL_LIGHTING);
     glEnable(GL_LIGHT0);
     static GLfloat lightPosition[4] = { 0.5, 0.0, 2.0, 1.0 };
     glLightfv(GL_LIGHT0, GL_POSITION, lightPosition);
-*/
+}
+
+
+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);
+
+    glBegin(GL_QUADS);                                  // Draw A Quad
+            glColor3f(0.0f,1.0f,0.0f);
+            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);
+
+            glColor3f(0.0f,1.0f,1.0f);
+            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);
+
+            glColor3f(1.0f,0.0f,0.0f);
+            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);
+
+            glColor3f(1.0f,0.0f,1.0f);
+            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);
 
+            glColor3f(0.0f,0.0f,1.0f);
+            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);
+
+            glColor3f(1.0f,1.0f,0.0f);
+            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);
+        glEnd();
 }
 
+void CubeWidget::resizeGL(int width , int height )
+{
+    glMatrixMode(GL_PROJECTION);
+
+    glViewport(0, 0, width, height);
+
+    glLoadIdentity();
+    perspective(45.0,1.0*width/height,0.01,5.0);
+
+    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::paintGL ( ) {}
-void CubeWidget::resizeGL(int width , int height ) {}
 void CubeWidget::mousePressEvent(QMouseEvent *event ) {}
 void CubeWidget::mouseMoveEvent(QMouseEvent *event ) {}
 void CubeWidget::wheelEvent(QWheelEvent *event ) {}

A1/hellocube/cubewidget.h

@@ -22,6 +22,9 @@ public:
 
     QSize minimumSizeHint() const;
     QSize sizeHint() const;
+
+private:
+    void perspective(GLdouble fovy, GLdouble aspect, GLdouble zNear, GLdouble zFar);
 };
 
 #endif // CUBEWIDGET_H