Time for action—animating the switch node

The osg::Switch class can display specified child nodes while hiding others. It could be used to represent the animation states of various objects, for instance, traffic lights. However, a typical osg::Switch node is not able to automatically switch between children at different times. Based on this idea, we will develop a new AnimatingSwitch node, which will display its children at one time, and reverse the switch states according to a user-defined internal counter.

  1. Include the necessary headers:
    #include <osg/Switch>
#include <osgDB/ReadFile>
#include <osgViewer/Viewer>
  2. Declare the AnimatingSwitch class. This will be derived from the osg::Switch class to take advantage of the setValue() method. We also ...

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