如何从aframe中的3D对象获取包围盒信息？ [英] How to get bounding box information from a 3D object in aframe?

问题描述

我正在一个aframe项目中，该项目涉及将未知大小的3D对象加载到我的场景中。自然，我想在将对象放入场景之前将其调整为一定大小（例如固定高度）。但是，如何从对象的边界框中提取宽度，高度和深度之类的信息呢？

I am working on an aframe project that involves loading 3D objects of unknown sizes into my scene. Naturally I would want to resize the object to a certain size (like fixed height) before I put it in the scene. But how do I extract information like width, height and depth from the object's bounding box?

推荐答案

您需要使用A -Frame的基础three.js API。该答案已发布了三个。 js之前，但这里是A-Frame版本：

You'll need to use A-Frame's underlying three.js APIs here. That answer has been posted for three.js before, but here's an A-Frame version:

// get three.js object from aframe entity
var el = document.querySelector('#my-element');
var object = el.getObject3D('mesh');

// compute bounding box
var bbox = new THREE.Box3().setFromObject(obj);
console.log(bbox.min, bbox.max)

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