X-com 2 style graph. Allow for thin walls

General Grid graph
#1

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.

Cheers

Grid Graph: Walkable from direction?
#2

Hi

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
    ctx.QueueFloodFill();
}));
#3

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

#4

Hey!

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.

Cheers

#5

Hi

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.

#6

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?

#7

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