Detecting the Node Link

Beginner Questions
#1

Hi, I’ve recently started using this and I was wondering if there a way to make a certain action play while the Ai is in a certain part of the map or performing a certain action.

I read in the script for Node Link 2 that you can detect if you are on this node. How would I be able to go about doing this? I would like to play a jump animation or be able to increase the movement speed while on the jump node for example. Thanks in advance.

#2

Hi

If you are using the RichAI movement script (which is the only one that has some reasonable support for off mesh links I’m afraid) you can use the RichAI.onTraverseOffMeshLink callback.

#3

Still it is not possible if it is not RichAI and it is custom one ?

#7

@aron_granberg I really need your answer.

#8

Hi

The movement scripts other than RichAI do not have support for detecting off mesh links at the moment.

If you have a node reference you can detect if it is part of a link by using the NodeLink2.GetNodeLink static method which will return null if it is not part of a link.

Also please do not spam the forum to bump the topic. As the forum banner clearly indicates I am currently on vacation and I am not able to answer forum posts as frequently as usual.

#9

I use Link1 on grid graph.
What if I tag nodes which start and end points of links are on them ?
How did you implement it in RichAI and can’t have it in custom or other movement scripts ?

#10

Hi

Link1 cannot be detected by any script. It is indistinguishable from the normal links in the pathfinding graph. NodeLink2 can be detected using the method I described above (and this is what RichAI does).
You can tag the start and end I suppose, but there may be cases where the path just moves across one of them but doesn’t go through the link.

#11

@aron_granberg I get reference to node with GetNearest and then when I use it in NodeLink2.GetNodeLink, it always return null.

Could you explain more how to achieve what you did in RichAI in my custom movement script ?

Edit: As I noticed because it doesn’t get nearest one on point graph. How can I find out what is the current graph which ai is on it ?

#12

You can get the closest node on a specific graph using

var nn = NNConstraint.Default;
// Search only the fourth graph (index 3)
nn.graphMask = 1 << 3;
AstarPath.active.GetNearest(point, nn);

You can find out which graph a node belongs to by accessing its node.Graph property.
See https://arongranberg.com/astar/docs/graphnode.html#Graph