Installing External Dependencies - tiancode/GamePlay GitHub Wiki
Before attempting to build GamePlay, you will need to install the external dependencies using the scripts provided in the top-level directory of the GamePlay repository, as follows:
Installing on Windows
Run the following command-line from the top-level directory of your GamePlay repository:
install.bat
MacOS X and Linux
Run the following command-line from the top-level directory of your GamePlay repository:
./install.sh
This script requires curl. See the setup instructions for Linux and Mac.
Source
The install scripts pull down a zip archive. This zip archive is created by compiling the http://github.com/gameplay3d/GamePlay-deps project.