Does It Support Staggered Isometric Grids?

Beginner Questions
#1

I wanted to know if this project supports staggered isometric grids directly? If not, are there any recommended third-party tools or resources that cater specifically to staggered isometric grids in Unity? Any insights or experiences shared would be greatly appreciated.

Thanks in advance for your help!

#2

Hi

This package only supports rectangular grids. However, wasting some grid area on empty space is not too bad.

#3

Hi Aron, as you suggested I tried to create a rectangular area inside the diamond shape and set all outer nodes as not walkable but it didn’t work.

//...
gridGraph.GetNode(x, y).Walkable = false;

After I print the node it was still true.

#4

Hi

Would you mind showing the full code that you used?

#5

Sure, I tried something like this:

using Pathfinding;
using UnityEngine;

public class GraphConstraint : MonoBehaviour
{
    public float leftBound = -10f;
    public float rightBound = 10f;
    public float topBound = 10f;
    public float bottomBound = -10f;

    void Start()
    {
        GridGraph gridGraph = AstarPath.active.data.gridGraph;

        for (int x = 0; x < gridGraph.width; x++)
        {
            for (int y = 0; y < gridGraph.depth; y++)
            {
                Vector3 worldPoint = (Vector3)gridGraph.GetNode(x, y).position;
                
                if (worldPoint.x > leftBound && worldPoint.x < rightBound &&
                    worldPoint.z > bottomBound && worldPoint.z < topBound)
                {
                    gridGraph.GetNode(x, y).Walkable = true;
                }
                else
                {
                    gridGraph.GetNode(x, y).Walkable = false;
                }
            }
        }

        AstarPath.active.Scan();
    }
}
#6

Hi

By calling Scan at the end, you’ll be destroying all nodes and re-creating it from scratch.
Instead, I’d recommend something like:

AstarPath.active.AddWorkItem(new AstarWorkItem(ctx => {
    var gg = AstarPath.active.data.gridGraph;
    gg.GetNodes(node => {
        Vector3 worldPoint = (Vector3)node.position;
        if (worldPoint.x > leftBound && worldPoint.x < rightBound &&
            worldPoint.z > bottomBound && worldPoint.z < topBound) {
            node.Walkable = false;
        }
    });

    // Recalculate all grid connections
    // This is required because we have updated the walkability of some nodes
    // Note: In a future update, you'll want to change this to gg.RecalculateAllConnections, for performance.
    gg.GetNodes(node => gg.CalculateConnections((GridNodeBase)node));
}));

See also Graph Updates during Runtime - A* Pathfinding Project

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