Hi @krisztian_toth!
It seems from your question that you're using the Forma SDK. Given that you have the URN, there are two steps to downloading the geometry data:
1. Get the element using:
const { element } = await Forma.elements.get({
urn: <insert-urn-here>,
})
2. From the representation you want on that element, you will need to get the Blob of that element's representation:
// The blob is unknown data. For volumeMesh, you will get binary GLB.
const blobResponse = await Forma.elements.blobs.get({
blobId: element.representations.volumeMesh.blobId,
})
const arrayBuffer: ArrayBuffer = blobResponse.data
See the Blob API for more information: https://app.autodeskforma.com/forma-embedded-view-sdk/docs/classes/elements.BlobsApi.html
Here are the different representations and what data they will include: https://app.autodeskforma.com/forma-embedded-view-sdk/docs/modules/elements.Representation.html
As for selection, you can use the Selection API to subscribe to when the selection in the scene changes. See https://app.autodeskforma.com/forma-embedded-view-sdk/docs/classes/scene_selection.SelectionApi.html...
Please let me know if this helps you
