shady is a CLI tool to render GLSL shaders.
I use it to display animations on my LED Cube.
Important notes :
I only managed to install shady
under the 32-bit version of the Raspberry Pi OS.
Under the 64 bits version, I receive the following error :
gcc: error: unrecognized command-line option '-marm'
If you install shady
in a headless OS (without display),
you must still install the X11 libraries. They are necessary for the compilation.
1. Install the OS :
I use the Raspberry Pi OS Lite (32 bits) image with my Raspberry Pi 4 :
2. Make sure the OS is up-to-date :
$ sudo apt update && sudo apt upgrade -y
3. Install dependencies needed for shady :
$ sudo apt install git build-essential libxcursor-dev libxinerama-dev libxi-dev \
libx11-dev libglu1-mesa-dev libxrandr-dev libxxf86vm-dev -y
4. Install the "go" language :
Note: if you are not using bash
as shell, you need to adapt the instructions below.
$ DEST="$HOME/.local/share"
$ mkdir -p $DEST
$ VERSION=1.21.1
$ wget https://dl.google.com/go/go$VERSION.linux-armv6l.tar.gz
$ tar -C $DEST -xzf go$VERSION.linux-armv6l.tar.gz
$ SHELL_RC="$HOME/.bashrc"
$ echo 'export GOPATH=$DEST/go' >> "$SHELL_RC"
$ echo 'export PATH=$DEST/go/bin:$PATH' >> "$SHELL_RC"
$ rm go$VERSION.linux-armv6l.tar.gz
reload .bashrc and check go :
$ source ~/.bashrc
$ go version
go version go1.21.1 linux/arm
5. Install shady :
If you run a headless OS, verify that $DISPLAY
is empty :
$ echo $DISPLAY
If needed, you can force $DISPLAY with :
$ export DISPLAY=
Install shady
:
$ go install github.com/polyfloyd/shady/cmd/shady@latest
shady
will be installed in $DEST/go/bin
:
$ which shady
/home/francois/.local/share/go/bin/shady
Check that shady
runs ok :
$ shady -?