NullEngine bug on latest preview version

Bugs
1

Hello,

I wanted to report an issue with version 5.0.0-alpha.63.
I am trying to create the headless version of Babylon using NullEngine but I get the following error :

TypeError: e._getDrawWrapper is not a function

Worth noting that it worked with the latest stable version, I recently upgraded to try the WebGPU port.

Cheers.

2

Adding @Evgeni_Popov who built the draw wrapper. Could you provide a repro of the code you use with nullEngine to pin point the culprit ?

3

It’s tough to provide a repro but should be fairly easy to reproduce. It always gives the error if the scene has at least one mesh and it fails on the first render call.

4

I’m not able to reproduce the problem:

https://playground.babylonjs.com/#RNJVMT

5

I was able to reproduce when it happens but I doubt it needs to be tested on Node.
So basically the issue comes up when adding a render outline like this :

sphere.renderOutline = true;
sphere.outlineWidth = 0.02;
sphere.outlineColor = BABYLON.Color3.Black();

Obviously you don’t need an outline serverside but I am using shared components thus the issue. I wasn’t able to reproduce it in the playground as well.

6

It still does not seem to break in the playground: https://playground.babylonjs.com/#RNJVMT#1 are you sure it is only this that made it break for you ?

7

Yup, I suspect it doesn’t break the playground since it still renders on a browser. Maybe if it’s tested in a NodeJS environment would be easier to replicate.

1 Like
8

Would it be possible for you to create a tiny repro on Github ? This would be amazingly helpful to troubleshoot. I am not able to repro in our unit tests and the only places I am seeing _getDrawWrapper in the outline do not make much senses :frowning:

Actually this does not fail on node:

import { NullEngine, Scene, FreeCamera, Vector3, HemisphericLight, MeshBuilder, Color3 } from '@babylonjs/core'

const engine = new NullEngine()

const scene = new Scene(engine);
new FreeCamera("camera1", new Vector3(0, 5, -10), scene);
new HemisphericLight("light", new Vector3(0, 1, 0), scene);

MeshBuilder.CreateGround("ground", {width: 6, height: 6}, scene);

const sphere = MeshBuilder.CreateSphere("sphere", {diameter: 2, segments: 32}, scene);
sphere.renderOutline = true;
sphere.outlineWidth = 0.02;
sphere.outlineColor = Color3.Black();

engine.runRenderLoop(() => {
    scene.render();
});

with

image
image823×203 19.1 KB

1 Like
9

Hi @Null just checking in, were you able to create a repro? :slight_smile:

10

Hey there, nope, I did a workaround by removing the outline in the Server side. Repro is tough given that I would need to provide the whole webpack based solution together with the wrapper I have used for Bjs.

11

I’ll try this one and let you know.

1 Like