This step reviews how to enable walkthroughs in your application.
The HOOPS/MVO Classes include an operator called HOpCameraWalk that maps mouse events to walkthrough logic. Let's hook this up by adding a new GUI button that will set the current operator to be HOpCameraWalk. We'll add a new method called CVisualizeView::OnWalkOperator:
void CVisualizeView::OnWalkOperator() { LocalSetOperator(new HOpCameraWalk(m_pHView)); }
Review the operator's interface, and then experiment with it to get a feel for how it functions. While walking through the power_plant.hsf file, you may notice objects refining as they come closer to the view, and being replaced by LOD or bbox representations as they get farther away.