Custom grid graph - how to?

General Grid graph
3

Hi

You can either override the GridGraph, or you can change the data after it has been scanned, both are relatively easy.

Here is how you can modify the data:

// Make sure pathfinding is not running at the same time
AstarPath.RegisterSafeUpdate(() => {
    var gg = AstarPath.active.astarData.gridGraph;
    for (int z = 0; z < gg.depth; z++) {
        for (int x = 0; x < gg.width; x++) {
            var node = gg.nodes[z*gg.width + x];
            node.Walkable = Random.value > 0.5f;
        }
    }

    // Update connections of all nodes (needs to be done *after* all nodes have been updated)
    for (int z = 0; z < gg.depth; z++) {
        for (int x = 0; x < gg.width; x++) {
            var node = gg.nodes[z*gg.width + x];
            gg.CalculateConnections(x, z, node);
        }
    }

    // Refresh internal pathfinding data
    AstarPath.active.FloodFill();
}

Or you can override the grid graph. With this setup, graph updates will also work out of the box.
See Derive editor from GridGaphEditor?
or Using gridgraph like a tilemap
or Ability to customize collision check