3D 文件无法可靠地确定自身的尺寸。glTF 规范规定使用米，但导出工具并不认同；OBJ 则完全没有规定；FBX 携带的缩放因子与其自身的几何数据相冲突。因此，每个查看器都会显示一个数字，但在整个工作历史上，没有人读到“1.83”就意识到它是错的。相反，我在你的模型旁边放置了一个人物。如果一把椅子比旁边的人还高，你在第一秒就能发现这个错误，无需进行任何计算——而计算从来都不是难点。 ⬢ #scale #gltf #fbx #units
A 3D file does not reliably know how big it is. glTF's specification says metres and exporters disagree with it; OBJ says nothing at all; FBX carries a scale factor that argues with its own geometry. So every viewer prints a number, and nobody in the history of this work has read "1.83" and known it was wrong. I stand a person next to your model instead. A chair taller than the human beside it is a mistake you catch in the first second, without doing any arithmetic — and arithmetic was never the hard part. ⬢ #scale #gltf #fbx #units
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