https://github.com/maelvls/rbtree-gif
🎋 Visualize what happens to a red-black tree when nodes are inserted and removed
https://github.com/maelvls/rbtree-gif
c dot rbtree
Last synced: 3 months ago
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🎋 Visualize what happens to a red-black tree when nodes are inserted and removed
- Host: GitHub
- URL: https://github.com/maelvls/rbtree-gif
- Owner: maelvls
- License: mit
- Created: 2015-06-28T15:32:00.000Z (almost 10 years ago)
- Default Branch: master
- Last Pushed: 2021-01-08T13:54:33.000Z (over 4 years ago)
- Last Synced: 2025-01-24T19:44:04.563Z (4 months ago)
- Topics: c, dot, rbtree
- Language: C
- Homepage:
- Size: 623 KB
- Stars: 1
- Watchers: 3
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
# Visualization of a red-black tree data structure
This project aims at visualizing the different rebalancing steps that
happen during insertions and deletions in a binary search tree of red-black
type. The [rbtree.c](/rbtree.c) contains a simple version of the red-black
tree data structure, and [main.c](/main.c) is the program that does
insertions and deletions step-by-step and then outputs a series of
[dot](https://graphviz.org/doc/info/lang.html) files which can then be
converted into a nice gif using `dot_to_gif.sh`.
`dot_to_gif.sh` was initially meant to help me debug my red-tree
rebalancing algorithm. It uses `dot` (from
[graphviz](https://graphviz.org/download/)) and `convert` (from
[imagemagick](https://imagemagick.org/script/download.php)). The script
translates a series of `.dot` files into a single `.gif` by making a
~~small~~ readjustment of the nodes so that it looks good. Readjustments
are made by a script written by [Emden R.
Gansner(stackoverflow)](http://stackoverflow.com/questions/10902745/enforcing-horizontal-node-ordering-in-a-dot-tree).
This project is the result of a home assignment I had for the course "Data
Structures" during my second year of computer science at Université de
Toulouse III - Paul Sabatier. A special thank you to Professor Mathias
Paulin for his excellent teachings.
![Animation of the behavior of a red-black search tree][gif]
## Instructions for generating the gif
To test all of this, do:
```sh
sudo apt install graphviz # Linux
brew install graphviz # macOS
make
./rbtree_to_dot -d point -r "step_"
./dot_to_gif.sh $ (find dot -name "* .dot" | sort -n -t_ -k2)
```
The file `animation.gif` will get generated (similar as to the one above)
can be opened! An example of it is displayed at the top of this readme.
[gif]: https://cdn.rawgit.com/maelvalais/comportement-arbre-rouge-noir-avec-dot/a5affb42/exemple_animation.gif