X-com 2 style graph. Allow for thin walls

Hey there.

In the modern xcom games it seems the path can be blocked between two adjacent nodes(squares), and I was wondering if that was possible with the layered grid graph?

To block a path with the layered grid graph I must block the entire square, but I was wondering if there was a way to only block the path between the two nodes? This would allow for thin walls, similar to xcom which would be ideal for my current project.



When the grid graph is normally scanned this is not possible. However it is possible to do using code.
Something like this:

AstarPath.active.AddWorkItem(new AstarWorkItem(ctx => {
    var node1 = AstarPath.active.GetNearest(position1).node as LevelGridNode;
    var node2 = AstarPath.active.GetNearest(position2).node as LevelGridNode;
    // Remove the connection between these 2 nodes
    for (int i = 0; i < 4; i++) {
        if (node1.GetNeighbourAlongDirection(i) == node2) {
             node1.SetConnectionValue(i, LevelGridNode.NoConnection);
        if (node2.GetNeighbourAlongDirection(i) == node1) {
             node2.SetConnectionValue(i, LevelGridNode.NoConnection);

    // Required to update some metadata after all node connections have been changed

Cheers for your reply, I will give this a go!


Thanks for that, it works quite well. The only Issue I am having now is caused by the funnel modifier because it tries to cut corners and units get stuck.

I am going to experiment a bit though, perhaps I can cut connections next to corners and doorways to allow a wider berth unless you have a nicer solution.



There is a setting on the grid graph called ‘cut corners’, have you tried disabling that? I’m not sure if it will change the output of the funnel modifier though. I think it should be equivalent.

It appears the cut corners option is only available on the grid graph, and not the layered grid graph.
Perhaps there is a way to turn off funneling when pathing through nodes that have cut connections?

Do you think you could show a screenshot of it happening?