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How can I navigate this book off-line?

Let’s say you have a long trip and you want to use it to teach yourself some shaders. In that case you can make a local copy of this book on your computer and run a local server.

For that you only need PHP, Python 3 and a git client. On MacOS and Raspberry Pi computers Python is installed by default but you still need to install PHP and a git client. For that:

On MacOSX be sure to have homebrew installed and then on your terminal do:

brew update
brew upgrade
brew install git php

On Raspberry Pi you need to get Raspbian, a Debian-based Linux distribution made for Raspberry Pi and then do:

sudo apt-get update
sudo apt-get upgrade
sudo apt-get install git-core glslviewer php

Once you have everything installed you just need to do:

cd ~
git clone --recursive https://github.com/patriciogonzalezvivo/thebookofshaders.git
cd thebookofshaders
git submodule foreach git submodule init && git submodule update
php -S localhost:8000

Then open your browser to http://localhost:8000/