orthographic camera for front, left and top view; kept perspective camera for perspective view

helloqube/myglwidget.cpp

@@ -284,7 +284,11 @@ void MyGLWidget::resizeGL(int width, int height){
     glMatrixMode(GL_PROJECTION);//from HelloGL example
     glLoadIdentity();
 
+    if (isPerspective){
         gluPerspective(45.0,p,0.1,1000);//set vof to 45°
+    } else{
+        glOrtho(-2*p,2*p,-2,2,1,1000);
+    }
 
     glMatrixMode(GL_MODELVIEW);