AR/VR Buttons Question

šŸŒµ Needle Engine
21 
import { Behaviour, GameObject, IPointerDownHandler, USDZExporter } from "@needle-tools/engine";


export class ClickToStartARiOS extends Behaviour  implements IPointerDownHandler{
    private exporter: USDZExporter;

    start() {
        this.exporter = GameObject.findObjectOfType(USDZExporter);
    }

    onPointerDown() {
        if (!this.exporter) return;
        this.exporter.exportAsync();
    }
}```
22

Oooooooo! Fab!!!

THANK YOU!

Iā€™ll try that right now!

by user 908977119781060648

23

YAAAAAAAAAAAAAAAAY! :partying_face::tada::beers::star::dizzy::star2::raised_hands:

It all works perfectly!

A million thanks for your time and expertise!!!

by user 908977119781060648

24

Nice :+1: glad I was able to help! Excited to see what youā€™re building this time :slightly_smiling_face:

25

Okay, a bit of related feedbackā€¦

Iā€™ve been trying out a couple of things and I have actually found a potential use-case for loading an external/pre-existing USDZ rather than going with a USDZExporter-generated one.

Using Blender to create scene assets and then Unity to put them all together, I have a scene which includes a primitive plane that uses a png transparency as its image texture.

The USDZ file format doesnā€™t particularly like png transparencies (as weā€™re all no doubt painfully aware :grimacing: ), however it does manage to display them reasonably properly if a materialā€™s blend mode is set to Alpha Clip (with a Clip Threshold of 0.5 or greater) as opposed to Alpha Blend. The bad news is that setting the material up like that (in anticipation of the scene itā€™s in being compiled for export as a USDZ) often makes the transparent texture look a bit crappy when itā€™s viewed as a GLB in a browser window or as a GLB in AR.

So, my workaround is to create and export a GLB with its png transparency/material set up as originally intended (i.e. with a blend mode of Alpha Blend) so that it looks good via all the regular ways that people might view it. Then I temporarily edit the materialā€™s blend mode to change it to Alpha Clip and export that version as (or convert the resultant GLB to) a USDZ which can be added to Needleā€™s ā€˜Custom USDZ Fileā€™.

Hope what Iā€™ve described makes sense and that it might prove useful? :slightly_smiling_face:

by user 908977119781060648