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Add option to specify wall value #61

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Add option to specify wall value #61

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11 changes: 7 additions & 4 deletions astar.js
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Original file line number Diff line number Diff line change
Expand Up @@ -44,12 +44,15 @@ var astar = {
path to the closest node if the target is unreachable.
* @param {Function} [options.heuristic] Heuristic function (see
* astar.heuristics).
* @param {Number} [options.isWall] Specifies a wall value with
* an initial / undefined value of 0.
*/
search: function(graph, start, end, options) {
graph.cleanDirty();
options = options || {};
var heuristic = options.heuristic || astar.heuristics.manhattan;
var closest = options.closest || false;
var isWall = options.isWall || 0;

var openHeap = getHeap();
var closestNode = start; // set the start node to be the closest if required
Expand Down Expand Up @@ -78,7 +81,7 @@ var astar = {
for (var i = 0, il = neighbors.length; i < il; ++i) {
var neighbor = neighbors[i];

if (neighbor.closed || neighbor.isWall()) {
if (neighbor.closed || neighbor.isWall(isWall)) {
// Not a valid node to process, skip to next neighbor.
continue;
}
Expand Down Expand Up @@ -272,8 +275,8 @@ GridNode.prototype.getCost = function(fromNeighbor) {
return this.weight;
};

GridNode.prototype.isWall = function() {
return this.weight === 0;
GridNode.prototype.isWall = function(isWall) {
return this.weight === isWall;
};

function BinaryHeap(scoreFunction) {
Expand Down Expand Up @@ -401,4 +404,4 @@ return {
Graph: Graph
};

});
});