A visualization tool for various pathfinding algorithms.

Last update: Dec 27, 2022

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Overview

Pathfinding Visualizer

Welcome to Pathfinding Visualizer! I built this application because I was fascinated by pathfinding algorithms, and I wanted to visualize them in action. I hope that you enjoy playing around with this visualization tool just as much as I enjoyed building it. You can access it here (use Google Chrome!): https://clementmihailescu.github.io/Pathfinding-Visualizer/

Meet the Algorithms

This application supports the following algorithms:

Dijkstra's Algorithm (weighted): the father of pathfinding algorithms; guarantees the shortest path

A Search* (weighted): arguably the best pathfinding algorithm; uses heuristics to guarantee the shortest path much faster than Dijkstra's Algorithm

Greedy Best-first Search (weighted): a faster, more heuristic-heavy version of A*; does not guarantee the shortest path

Swarm Algorithm (weighted): a mixture of Dijkstra's Algorithm and A*; does not guarantee the shortest-path

Convergent Swarm Algorithm (weighted): the faster, more heuristic-heavy version of Swarm; does not guarantee the shortest path

Bidirectional Swarm Algorithm (weighted): Swarm from both sides; does not guarantee the shortest path

Breath-first Search (unweighted): a great algorithm; guarantees the shortest path

Depth-first Search (unweighted): a very bad algorithm for pathfinding; does not guarantee the shortest path

On top of the pathfinding algorithms listed above, I implemented a Recursive Division Maze Generation algorithm.

More about the Swarm Algorithm

The Swarm Algorithm is an algorithm that I - at least presumably so (I was unable to find anything close to it online) - co-developed with a good friend and colleague, Hussein Farah. The algorithm is essentially a mixture of Dijkstra's Algorithm and A* Search; more precisely, while it converges to the target node like A* , it still explores quite a few neighboring nodes surrounding the start node like Dijkstra's. The algorithm differentiates itself from A* through its use of heuristics: it continually updates nodes' distance from the start node while taking into account their estimated distance from the target node. This effectively "balances" the difference in total distance between nodes closer to the start node and nodes closer to the target node, which results in the triangle-like shape of the Swarm Algorithm. We named the algorithm "Swarm" because one of its potential applications could be seen in a video-game where a character must keep track of a boss with high priority (the target node), all the while keeping tracking of neighboring enemies that might be swarming nearby.

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Comments

Made some changes to improve user experience. Read the comment for more.
First of all... Big fan Clement! :)

I love this project. But, when I was checking out the project, it felt a little buggy while creating walls. So I've added these 3 features to make it better:

Disabled right click context menu within board. Previously, right click on the board would open up the context menu. This is unnecessary and so it is disabled.

Separated left and right mouse button functionalities. Previously, both left and right mouse buttons could add as well as delete walls. Now, left mouse button will only be able to add walls and right mouse button will only be able to delete walls.

Added mouseup and mousedown functions on body. Previously, when creating walls, it seemed to be kind of buggy. Also, when the user drags out of the page, on bringing the cursor back, it would continue to create walls. Now, mouseup function has been added to body to reduce buggy feeling and also, mouseleave function has been added to stop creating walls after leaving the page and returning back. NOTE: This was only done for normal elements and NOT special elements.

Let me know if I need to change anything before this can be merged. Cheers :)
opened by Nirmal-Palanichamy 1
Thank you for this tool

Hello

Just a quick message to thank you for this tool. I used it yesterday for a talk about Algorithms and Heuristics. A lot of people love it.

Have a nice day

opened by aloisdg 0

A visualization tool for various pathfinding algorithms.

Related tags

Overview

Pathfinding Visualizer

Meet the Algorithms

More about the Swarm Algorithm

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Comments

Made some changes to improve user experience. Read the comment for more.

Thank you for this tool

Owner

Clément Mihailescu

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