Panda3D is a game engine, a framework
for 3D rendering and game development for Python and C++ programs. It includes graphics, audio, I/O, collision detection, and other abilities relevant to the creation of 3D games. Also, Panda3D is Open Source and free for any purpose, including commercial ventures. This book will enable you to create finished, marketable computer games
using Panda3D and other entirely open-source tools and then sell those games
without paying a cent for licensing.