A* Pathfinding Project: How to get remaining distance on the path

Unity Engine
,
1

I want to make a very simple script that gonna do only that, show how far it is to the target using A* pathfinding, i am a complete noob at coding so explanation would be appreciated.

2

This can give you good start.

Seeker.StartPath(start, target, OnPathCalculated, graphMask);
  
   void OnPathCalculated(Path path){

       if(path.error){
           return;
       }

        float pathLength = path.GetTotalLength()
}

Edit:I have assumed you are using A* Pathfinding by aron granberg.

3

yes, i using that asset, but the free version of it

4 
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using Pathfinding;

public class PFing : MonoBehaviour
{

    Seeker.StartPath(start, target, OnPathCalculated, graphMask);
   void OnPathCalculated(Path path)
    {

        if (path.error)
        {
            return;
        }

        float pathLength = path.GetTotalLength()
}

}

for every field in this “Seeker.StartPath(start, target, OnPathCalculated, graphMask);” line it tells me that “it does not exist in the current context” what am i missing?

5

Ok i see you are real beginner.
Try this.

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using Pathfinding;

public class PFing : MonoBehaviour
{

public Seeker seeker;


void Start(){
    seeker.StartPath(start, target, OnPathCalculated);
}

   void OnPathCalculated(Path path)
    {

        if (path.error)
        {
            return;
        }

        float pathLength = path.GetTotalLength()
}

}
6

huh, is it supposed to return length in console instead of public float or am i missing something?

7

May I ask what are you need it for ?
Because it looks like your programming skill is “Hello World” level.
And it might be good idea to start with a basics.

8

i make an xcom like game and want to get the path length to see if it’s more or less then a treshold to spawn a tile that player can click on, and i use playmaker so most of the logic i made in it, but there is no action for astar to get the length of the path which is the crucial for field of movement visualization, i managed to make it with unity navmesh but it’s too slow, so i need astar

9

and yes, my coding skills are low, i do understand principles but my problem is syntax and what even can i do, and i have no clue where to look for things i need, i look at astar documentation but it’s just confusing for me

10

I will not help you with playmaker and how to grab data from component to playmaker since I don’t use it.
But since it is a turn based game and you are just a beginner I suggest using:

        var path = Pathfinding.ABPath.Construct(start, end);
        AstarPath.BlockUntilCalculated(path);

This will block thread until path is completed.

11

where can i found an extensive explanation on astar functions? i tried to google what “path.GetTotalLength” actually do, but all the documentations i found doesn’t really tell much

12

You are joking, right ?

Here is a documentation:
https://arongranberg.com/astar/docs/

13

oh, there were a search bar… didn’t saw it for all this time for some reason