Time for action—writing descriptions for the Cessna

This time we are going to display a Cessna in the 3D space and provide descriptive texts in front of the rendered scene. A heads-up display (HUD) camera can be used here, which is rendered after the main camera, and only clears the depth buffer for directly updating texts to the frame buffer. The HUD camera will then render its child nodes in a way that is always visible.

  1. Include the necessary headers:
    #include <osg/Camera>
#include <osgDB/ReadFile>
#include <osgText/Font>
#include <osgText/Text>
#include <osgViewer/Viewer>
  2. The osgText::readFontFile() function is used for reading a suitable font file, for instance, an undistorted TrueType font. The OSG data paths (specified with OSG_FILE_PATH) ...

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