NavMesh

🌵 Needle Engine
1

Hi Needle Team,

I would like to create games which use IA. When I’m watching how to do it on unity, they use NavMesh a lot.
Do Needle implement it ? I didn’t find it on the documentation.

Have a good day

Original Post on Discord

by user 224464722878005248

2

Hi, we dont have a NavMesh implementation right now but it should be relatively easy to get something going with GitHub - donmccurdy/three-pathfinding: Navigation mesh utilities for three.js, based on PatrolJS.

3

Oh thank you very much !

by user 224464722878005248

4

Hi, it’s me, again

I’m currently working on adding NavMesh custom component by using needle to simplify Navigation for other project.
But I have a difficulty about the file extension NavMesh from unity.

Basically, the library PathFinding use the NavMesh as a glb file and it’s load separatly than the model (the level model)

Problem : in Unity it’s a NavMesh.asset which is used as information file in the scene
Not as a 3D Mesh.

Do you have an idea of how automatically export it as glb ? (I tried to find how do it manually on unity it seems that it can’t)
Or extract the mesh from the asset ?

by user 224464722878005248

5

It uses the mesh doesnt it?

6

Multiple meshes in fact

by user 224464722878005248

7

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by user 224464722878005248

8

Have you tried just adding a field for the navmesh agent to your C# component and then use the serializer to export it?

9

You can use codegen too if you match the type name or use //@type UnityEngine.NavMeshAssetType above the typescript field (not sure about the full name here)

10

Then you should get the data from Unity. Not sure what the format is tho

11

Oh yes, I tried to serialise it but I failed, I will try it and watch what’s in there

by user 224464722878005248

12

Failed how?

13

To add a field in my custom component to get the Nav Mesh in my script to console.log it

by user 224464722878005248

14

I forgot that the //@type exist

by user 224464722878005248

15

Yeah you can always also write a c# component by hand or add stuff outside the codegen guards (// NEEDLE_CODEGEN_END) or extend the partial class elsewhere

16

there’s an example in the docs for that too

17

Does it work? :slightly_smiling_face:

18

Nop, I tried to load the NavMeshData as a mesh to use this function :

// Initialisation of pathFinding
        const pathfinding = new Pathfinding();
        const pathfindinghelper = new PathfindingHelper();
        this.context.scene.add(pathfindinghelper)

        const ZONE = 'level1';
        let groupId;
        let navpath;
        pathfinding.setZoneData(ZONE,     Pathfinding.createZone(this.myNavmesh?.geometry));

But the geometry of the NavMesh seems to be empty

by user 224464722878005248

19

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by user 224464722878005248

20

So it generates an error

by user 224464722878005248