How to get distance between two hexagonal tile

[ffbh]

plz check the picture, is there any method existing to calculate the distance? (just the distance, do not care if the cell is walkable or unwalkable)
I need something like this:

int GetDistance(GridNode node1, GridNode node2)

[aron_granberg]

Hi

You can get a node’s coordinates using

x = node.XCoordinateInGrid;
z = node.ZCoordinateInGrid;

then you can use an off-the-shelf hexagon distance metric:

distance = max(
     abs(dest.y - start.y),     
     abs(dest.x - start.x),
     abs((start.x - start.y) - (dest.x - dest.y))
)

(I have not verified that this particular formula works, but if not that, at least a very similar formula for hex distances)

[ffbh]

Yes, it works, and now I want a similar function but the non-walkable should be taken into account for the GetDistance(GridNode node1, GridNode node2)

[aron_granberg]

That sounds like you just want to calculate a path between A and B and check how many nodes it contains.

[ffbh]

that’s it, where can I find the example code

[aron_granberg]

You can find documentation about that here: Searching for paths - A* Pathfinding Project