The recommended format for importing and exporting assets is glTF (GL Transmission Format). Because glTF is focused on runtime asset delivery, it is compact to transmit and fast to load.
three.js provides loaders for many other popular formats like FBX, Collada or OBJ as well. Nevertheless, you should always try to establish a glTF based workflow in your projects first. For more information, see [link:#manual/introduction/Loading-3D-models loading 3D models].
<p>[link:https://developer.apple.com/library/content/documentation/AppleApplications/Reference/SafariWebContent/UsingtheViewport/UsingtheViewport.html Safari: Using the Viewport]</p>
<p>[link:https://developer.mozilla.org/en/Mobile/Viewport_meta_tag MDN: Using the viewport meta tag]</p>
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<h2>How can scene scale be preserved on resize?</h2>
<h2>如何在窗口调整大小时保持场景比例不变？</h2>
<p>
We want all objects, regardless of their distance from the camera, to appear the same size, even as the window is resized.
The key equation to solving this is this formula for the visible height at a given distance:
This could be because of face culling. Faces have an orientation that decides which side is which. And the culling removes the backside in normal circumstances. To see if this is your problem, change the material side to THREE.DoubleSide.
