Displaying an object with the proper relative size in the given scene

[Domthegrom]

Description

QUESTION

This is more of a question. I've been playin wtih gLTF files and usdz files of objects like a couch or lamp and then rendering them into the scene viewer using the model-viewer tag and every time I try to render in the object it scales up to 100% by default and is extremely large floor to ceiling level large.

I am trying to find a way to set a static object size so that when it renders in it's relative to the real size of the object. Like a couch I wouldn't want to be able to manipulate its size in the scene viewer because I want the size to be true to the real product.

Live Demo

I've got a very very simple demo running here: https://admiring-euler-6bba35.netlify.com/

Browser Affected

Not a bug but I've been testing in:

• [x ] Chrome
• Edge
• Firefox
• Helios
• IE
• [x ] Safari

OS

not a bug but I've been testing in

• Android
• iOS
• Linux
• [x ] MacOS
• Windows

Versions

• model-viewer: vX.X.X
• three.js: rXX

[cdata]

@Domthegrom in general, APIs are starting to align on 1 model unit = 1 meter, and <model-viewer> and Scene Viewer align to this as well. So, if you make a model that is 1 unit x 1 unit x 1 unit in your design tool, it will be 1m x 1m x 1m in AR if you are using WebXR or Scene Viewer.

For Apple purposes, I understand that .usdz has a way to configure the meters-per-unit in the model, so getting the model to be the right size might come down to how you produce your .usdz. We have an outstanding discussion on this topic in #559 where it was requested that we document this detail more thoroughly, but we haven't gotten around to it yet.

[elalish]

@Domthegrom In addition to ensuring the model's units are correct, you can also use our ar-scale attribute, which when set to fixed disables user scaling in SceneViewer so that the model is always at 100%.