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https://github.com/pipeseroni/weave.sh
Weaving in terminal
https://github.com/pipeseroni/weave.sh
bash math pipeseroni terminal-screensaver weaving
Last synced: 3 days ago
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Weaving in terminal
- Host: GitHub
- URL: https://github.com/pipeseroni/weave.sh
- Owner: pipeseroni
- License: mit
- Created: 2015-05-01T01:53:56.000Z (over 9 years ago)
- Default Branch: master
- Last Pushed: 2015-08-23T18:17:57.000Z (about 9 years ago)
- Last Synced: 2024-08-02T05:13:16.075Z (3 months ago)
- Topics: bash, math, pipeseroni, terminal-screensaver, weaving
- Language: Shell
- Homepage: https://pipeseroni.github.io/
- Size: 160 KB
- Stars: 31
- Watchers: 3
- Forks: 1
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
- awesome-terminal-art - weave.sh
README
weave.sh
========
*Weaving with simple math in terminal.*
It's written intently to be used as a screensaver. To weave, you need to give it an evaluation code as first argument, e.g.
```bash
weave.sh '(((x + y) % 2))'
```
The script draws vertical lines first, then use the supplied code to decide if a horizontal line is weaved over the vertical line. Where `x` is between 1 and terminal width `W` (columns) and `y` is between 1 and terminal height `H` (rows). If it evaluates as true, meaning the final value == 0, then it does that; otherwise go under the vertical line. There is more examples in `sample-screensaver.sh`. You can even write a Bash function if it's too complicated as one-liner:
```bash
triangle() {
(((x + y) % 2)) && ((x * H / W >= (y - 1)))
}
export -f triangle
weave.sh 'triangle'
```
Configuration
-------------
The script has no options, it relies on environment variables entirely, the following is the default values:
```bash
# Characters and colors for vertical and horizontal lines
char_v='|' char_h='-'
color_v='\e[32;1m' color_h='\e[31;1m'
# Sleep delays
sleep_v=0.01 ${sleep_h=0.01
sleep_end=5
eval_h="$1" # Get evaluation code from '$1'
eval_h='(((x+y)%2))' # , or set to a default pattern
show_eval_h=no #"yes" to print out evaluation code
```
For example, if you want to change the characters, you can do
```bash
char_v='┃' char_h='━' weave.sh
```
Screenshots and video
---------------------
Here is a [video of `sample-screensaver.sh`](http://youtu.be/voFiTMweXHs).
[](http://www.flickr.com/photos/livibetter/8778875471/)
`weave.sh '(( $(echo "v=s(($x-1)*2*4*a(1)/$W);scale=0;$H-$H*(v+1)/2 == $y" | bc -l) ))'`
[](http://www.flickr.com/photos/livibetter/8785449798/)
`weave.sh '(((x % 5 + y % 11) % 2))`
Contribution
------------
Feel free to create pull request. Whether make the code better or add some awesome examples to `sample-screensaver.sh`, they are all welcome.
License
-------
Copyright (c) 2013 Yu-Jie Lin
weave.sh is licensed under the MIT License