glTF/GLB model size - is there any tool for checking it?

[JMAR09]

Hi guys, is there any tool, where I can check actual size (dimmensions) of glTF/GLB model?

Imagine that we got some 3D models of TV, we would like to use them for AR presentation, but before we would like to be sure, if dimmension of those models is correct.

Hope, that my question is clear.

Thank you in advance

Jan :)

[javagl]

First, a small aside: This repository here is for the glTF Tutorials - so this issue does not really belong here. Questions like this could probably better fit into the forum at https://community.khronos.org/c/gltf-general/45

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However, in general, glTF models SHOULD always have "the right size", and this size should always be given in meters. A strongly related question has been brought up recently, at KhronosGroup/glTF-Sample-Assets#63 .

But of course, it can make sense to check that, because ... you never know what that GLB might contain. According to what Don said in that other issue, the https://github.com/donmccurdy/glTF-Transform tools already offer that functionality, namely computing the bounds of a whole scene or node. The relevant function is https://github.com/donmccurdy/glTF-Transform/blob/main/packages/core/src/utils/bounds.ts

Some rough draft of how you could do this would be

import { NodeIO } from '@gltf-transform/core';
import { bounds } from '@gltf-transform/core';
...
    const document = io.read('C:/yourFile.glb');
    const {min, max} = bounds(document.getRoot().listScenes()[0])    
    const sizeX = max[0] - min[0];
    const sizeY = max[1] - min[1];
    const sizeZ = max[2] - min[2];

    if (sizeX > ...) console.log("Nope, that's too large...");
    ...

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[donmccurdy]

The bounds can also be found by CLI or on a website if that's easier:

(1) CLI

npm install --global @gltf-transform/cli
gltf-transform inspect input.glb

(2) https://gltf.report/