Displaying path from pointgraph in the scene

Beginner Questions
#1

I am using the point graph system, and i’m curious as to how i would go about adding a line that correctly depicts the shortest path between two nodes in said point graph. I’m aware that i should use the line renderer, although i’m not sure where/how to add script to accomplish this.

Thanks,

#2

Does anyone know how to render lines from node to node?

#3

Hi

You can use the Unity LineRenderer to draw lines. It should be relatively straight forward to get the path on the callback and then simply assign the points to a LineRenderer.
If you have the pro version, the example scene PathTypes does just that.

Something like this:

public void OnPathComplete (Path p) { List<Vector3> path = p.vectorPath; lineRenderer.SetVertexCount (path.Count); for (int i=0;i<path.Count;i++) lineRenderer.SetPosition (i, path[i]); }

Visualising agent's path in game by line renderer
#4

I’m not too keen on c# code and transcribing it to javascript. Could you possibly give the javascript code for this? Thanks!

#5

And would it be possible to reference the last path completed and only use that path to render?

#6

Hi

If you use that code, it would replace the contents of the line renderer every time a path is completed, so it will always show the last path.

I’m not too good at javascript, but I will try:

`
var lineRenderer : LineRenderer;

function OnPathComplete (p : Path) {
List path = p.vectorPath;
lineRenderer.SetVertexCount (path.Count);
for (var i = 0;i < path.Count; i++) {
lineRenderer.SetPosition (i, path[i]);
}
}`

#7

I think something like this is closer. Import the lib for lists.

import System.Collections.Generic;

then try this

var drawpath : List.<Vector3> = p.vectorPath; var lineRenderer : LineRenderer = gameObject.AddComponent(LineRenderer); lineRenderer.SetVertexCount (drawpath.Count); for (var i = 0;i < drawpath.Count; i++) { lineRenderer.SetPosition (i, drawpath[i]); }