Unity-2d-pathfinding

A very simple 2d tile-based pathfinding for unity, with tiles price supported.

NEW REPO

I moved this script to a dedicated repo for Unity utilities.

A newer version can be found here along with other useful Unity scripts.

This repo will remain online but won’t be maintained.

About

This code is mostly based on the code from this tutorial, with the following modifications:

• Removed all rendering and debug components.
• Converted it into a script-only solution, that relay on grid input via code.
• Separated into files, some docs.
• A more simple straight-forward API.
• Added support in tiles price, eg tiles that cost more to walk on.

But overall most of the credit belongs to Sebastian Lague, so show him your love.

How to use

First, copy the folder ‘PathFinding’ to anywhere you want your asset scripts folder. Once you have it use pathfinding like this:

// create the tiles map
float[,] tilesmap = new float[width, height];
// set values here....
// every float in the array represent the cost of passing the tile at that position.
// use 0.0f for blocking tiles.
// create a grid
PathFind.Grid grid = new PathFind.Grid(width, height, tilesmap);
// create source and target points
PathFind.Point _from = new PathFind.Point(1, 1);
PathFind.Point _to = new PathFind.Point(10, 10);
// get path
// path will either be a list of Points (x, y), or an empty list if no path is found.
List<PathFind.Point> path = PathFind.Pathfinding.FindPath(grid, _from, _to);

If you don’t care about price of tiles (eg tiles can only be walkable or blocking), you can also pass a 2d array of booleans when creating the grid:

// create the tiles map
bool[,] tilesmap = new bool[width, height];
// set values here....
// true = walkable, false = blocking
// create a grid
PathFind.Grid grid = new PathFind.Grid(width, height, tilesmap);
// rest is the same..