How to manually change grid node tag info ,without use graph update

General Grid graph
1

Hi Aron

currently i’m working on a TD game, which user can use an box to block the path,

so every time user try to block the path , i need detect is there remain an open path on the map.

Basically，when the user really put one box on the map , i will create one GameObject attach with GraphUpdate component with it, and modify the tags info.

but for the detect part ,i wonder is there a way that i can set the tag info manually?

here is the code i used right now.

Function:

public GridNode GetAStarNode (int _tileIndexX, int _tileIndexY)
{
	GridGraph gridGraph = AstarPath.active.astarData.gridGraph;
	return gridGraph.nodes [ _tileIndexY * gridGraph.width + _tileIndexX];
}


public static void SetAttribute (ref uint _target, int _index)
{
	if (!HasAttribute (_target, _index)) {
		_target |= (uint)(1 << _index);
	}
}

public static void RemoveAttribute (ref uint _target, int _index)
{
	if (HasAttribute (_target, _index)) {
		_target &= ~(uint)(1 << _index);
	}
}

Before FindPath:

GridNode node = GetAStarNode (tileIndexX, tileIndexY);
uint tagValue = node.Tag;
SetAttribute (ref tagValue, GlobalConst.TILE_TAG_INDEX_ATTEMPT_BLOCK);
node.Tag = tagValue;

After FindPath:

GridNode node = GetAStarNode (tileIndexX, tileIndexY);
uint tagValue = node.Tag;
RemoveAttribute (ref tagValue, GlobalConst.TILE_TAG_INDEX_ATTEMPT_BLOCK);
node.Tag = tagValue;

Enemy: each one attach one seeker which can walk on Floor & AttemptBlock Tag;
OpenPathFinder(CESingleton): attach one seeker only can walk on Floor Tag;

that’s code working most of the time. but when i have dozen enemy on the map , and try to put box on the map quickly, then some enemy can’t find the path

1 each time put one box on the map, all enemy need recalculate the path once.
2 in the game view , there exist one open path (seeker Draw Gizmos can see one green line from begin point to end point)

any idea on why the enemy can’t find path?

PS: Thread Count property i set to None, and this bug only happen when click quickly.

Thanks.