Install libplib-doc by entering the following commands in the terminal:
sudo apt update sudo apt install libplib-doc
Description:
Portability Libraries: documentation and examples
The Portability Libraries plib provide a Joystick interface, a simple GUI built on top of OpenGL, some standard geometry functions, a sound library and a simple scene graph API built on top of OpenGL. . This package contains HTML documentation and examples for plib. The documentation is a copy of the documentation which can be found online at http://plib.sourceforge.net/
Homepage: http://plib.sourceforge.net/
Version: 1:1.8.5-3.1
Section: universe/doc