ndarray-pathfinder v0.2.0

ndarray-pathfinder

A* pathfinding through an ndarray of cost values.

Implemented by wrapping ndarray accessors around abstract-pathfinder.

Installation:

npm install --save ndarray-pathfinder

Usage:

var finder = require('ndarray-pathfinder')

// array through which to pathfinding
var arr = new ndarray(new Float32Array(25), [5, 5])

// barriers
arr.set(1, 1, 100)
arr.set(2, 1, 100)
arr.set(3, 1, 100)

// start/end nodes
var start = [0, 0]
var goal = [3, 3]

// returns path as array of n-length arrays
var path = finder(arr, start, goal)
// path: [ [0,0], [0,1], ... ]

Optional arguments:

var preferDiag = true
var costFcn = function(value) {
    if (value < 0) return -1
    return 1 + value
}
var path = finder(arr, start, goal, preferDiagonal, costFcn)

• preferDiagonal - a flag that adds a small term to the heuristic to prefer cells closer the goal
• costFunction - a function to convert ndarray values to movement costs

Notes:

• Orthogonal (l1) moves only for now
• Should work in any dimension (2D or above)

By:

Andy Hall. MIT license.