How to access Three.js custom objects created on scene?

[RodrigoRVSN]

Question

How can I get the children of the scene, including the custom objects added with addObject3D?

Workaround

I managed to do that using

const viewer = new Cognite3DViewer({
    sdk: client,
    domElement: widget,
    loadingIndicatorStyle: { placement: 'topRight', opacity: 1 },
    antiAliasingHint: 'disabled',
})

console.log(viewer?.models[0].cadNode.parent.children)

With some TS errors (cadNode is not defined in TS), but would like to know if there's a more straightforward way to do that that I'm missing since it looks like getScene() was removed

Context

• Using version ^4.15.1 of library
• The idea of being able to access the children on the scene would be to, in our measurement tool feature created from scratch, be able to intersect with the Raycast the LineSegments, etc. created on the scene

[pramod-cog]

@RodrigoRVSN To get intersection for custom objects added into Reveal, you can use getAnyIntersectionFromPixel() API by enabling options.

reveal/viewer/packages/api/src/public/migration/Cognite3DViewer.ts

Line 1679 in ac47a37

public async getAnyIntersectionFromPixel(

Note: The API is still in Beta, but it can be used.

[RodrigoRVSN]

Thanks for the answer @pramod-cog

I tried to do it like this

    const getHitObject = useCallback(
        async (event: MouseEvent) => {
            const intersection = await viewer?.getAnyIntersectionFromPixel(
                new THREE.Vector2(event.offsetX, event.offsetY),
                {
                    predicate: () => true,
                }
            )
            console.log(intersection)

            return intersection
        },
        [viewer]
    )

It is triggered in a mouvemove event listener (event variable), but for some reason, the intersection returns the cad elements on the scene, ignoring the custom objects created, like the LineSegments, Sprite, etc., and returning undefined for them.

Am I missing something in this implementation?

[pramod-cog]

You need to pass the custom object in predicate callback. e.g Reference

reveal/react-components/src/architecture/base/commands/BaseTool.ts

Line 171 in ac47a37

const predicate = (customObject: ICustomObject): boolean => {