title: Aframe: size of model
body: <p>When using a model as a source to an entity, say gltf, is there a way we know the original size? Since the <code>scale</code> attribute works on relative size, it seems to be a trial an error to fit the model to our desired size. I tried using the <code>geometry.getComputingBox()</code> of the mesh of the model but it returns null. Wondering if there is a component that is available that lets us specify the scale in absolute terms. </p>