Install libopenscenegraph-dev by entering the following commands in the terminal:
sudo apt update sudo apt install libopenscenegraph-dev
3D scene graph, development files
A portable, high level graphics toolkit for the development of high performance graphics applications such as flight simulators, games, virtual reality or scientific visualization. Providing an object orientated framework on top of OpenGL, it frees the developer from implementing and optimizing low level graphics calls, and provide many additional utilities for rapid development of graphics applications. . This package contains the development headers.