AstarPath.active.graphs[index1].nodes[index2].connections always equals null

Beginner Questions
1

Hello,
I am trying to get a listing of all the connecting nodes to each node of every graph. The variable ‘connections’ is a type of Pathfinding.Node[]. I read the documentation on it only to find that ‘connections’ is supposed to store an array of all the connecting nodes (which I want), but whenever I use ‘connections’, it always equals null.

AstarPath.active.graphs[index1].nodes[index2]

returns a valid node if my 2 indexes are in range, but using

AstarPath.active.graphs[index1].nodes[index2].connections

always returns null, and using

AstarPath.active.graphs[index1].nodes[index2] .connections[index3]

then gives me an error even though AstarPath.active.graphs[index1].nodes[index2] has connecting nodes to it.

Is there any way to fix this problem so that the connections array will work?

                    Thank you,
                             Michael S. Lowe
2

Why doesn’t the connections property work? Anyone? No matter what, connections always equals null so I have no access to any of its indexes. connections is an array of Pathfinding.Node.

3

From the node class:

`/** List of all connections from this node. This node's neighbour nodes are stored in this array.
 * \
ote Not all connections are stored in this array, some node types (such as Pathfinding.GridNode) use custom connection systems which they store somewhere else.
 * \\see #connectionCosts */
public Node[] connections;`

So that might be what you are running into if you are using a GridGraph.

Looks like this is how you would get other nodes from a GridNode. (Code from GetConnections method in GridNode)

`
			GridGraph graph = gridGraphs[indices >> 24];
			
			int index = GetIndex ();
			
			int[] neighbourOffsets = graph.neighbourOffsets;
			Node[] nodes = graph.nodes;
			
			for (int i=0;i<8;i++) {
				if (((flags >> i) & 1) == 1) {
					
					Node node = nodes[index+neighbourOffsets[i]];
					
					callback (node);
				}
			}
`

Might just want to set up using GetConnections rather than iterating through them yourself (assuming you have no islands in your graph.)

4

I found it.