Install castle-game-engine-src by entering the following commands in the terminal:
sudo apt update sudo apt install castle-game-engine-src
Castle Game Engine - Source code for Lazarus integration
Castle Game Engine is a set of LGPL licenced libraries that are intended to ease developing 3D games with FreePascal / Lazarus. . It provides an excellent support for the VRML / X3D 3D data format. Other 3D formats are also supported. . It features many advanced graphic effects and easy to use API on top of OpenGL. . This package contains source code for integration with Lazarus RAD IDE.