We now have all the 2D GUI elements in place. Any 2D GUI that will now be built will be a modification of these elements.
Another important aspect of building these primitive elements is that we have now laid down a basic structure of how the elements should look like. Anything can now be built similarly.
After the 2D GUI elements, we now have to build a follower menu. A follower menu for a 3D element is a menu that follows the element around when it moves and yet faces the camera at all times. A single follower element is easy to implement using
vtkFollower but we need an aggregate of actors to follow. For this,
vtkAssembly needs to be used.
Therefore, the next task is getting
vtkAssembly to work along with